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Mondello SE, Young L, Dang V, Fischedick AE, Tolley NM, Wang T, Bravo MA, Lee D, Tucker B, Knoernschild M, Pedigo BD, Horner PJ, Moritz CT. Optogenetic spinal stimulation promotes new axonal growth and skilled forelimb recovery in rats with sub-chronic cervical spinal cord injury. J Neural Eng 2023; 20:056005. [PMID: 37524080 PMCID: PMC10496592 DOI: 10.1088/1741-2552/acec13] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 07/17/2023] [Accepted: 07/31/2023] [Indexed: 08/02/2023]
Abstract
Objective.Spinal cord injury (SCI) leads to debilitating sensorimotor deficits that greatly limit quality of life. This work aims to develop a mechanistic understanding of how to best promote functional recovery following SCI. Electrical spinal stimulation is one promising approach that is effective in both animal models and humans with SCI. Optogenetic stimulation is an alternative method of stimulating the spinal cord that allows for cell-type-specific stimulation. The present work investigates the effects of preferentially stimulating neurons within the spinal cord and not glial cells, termed 'neuron-specific' optogenetic spinal stimulation. We examined forelimb recovery, axonal growth, and vasculature after optogenetic or sham stimulation in rats with cervical SCI.Approach.Adult female rats received a moderate cervical hemicontusion followed by the injection of a neuron-specific optogenetic viral vector ipsilateral and caudal to the lesion site. Animals then began rehabilitation on the skilled forelimb reaching task. At four weeks post-injury, rats received a micro-light emitting diode (µLED) implant to optogenetically stimulate the caudal spinal cord. Stimulation began at six weeks post-injury and occurred in conjunction with activities to promote use of the forelimbs. Following six weeks of stimulation, rats were perfused, and tissue stained for GAP-43, laminin, Nissl bodies and myelin. Location of viral transduction and transduced cell types were also assessed.Main Results.Our results demonstrate that neuron-specific optogenetic spinal stimulation significantly enhances recovery of skilled forelimb reaching. We also found significantly more GAP-43 and laminin labeling in the optogenetically stimulated groups indicating stimulation promotes axonal growth and angiogenesis.Significance.These findings indicate that optogenetic stimulation is a robust neuromodulator that could enable future therapies and investigations into the role of specific cell types, pathways, and neuronal populations in supporting recovery after SCI.
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Affiliation(s)
- Sarah E Mondello
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA 98195, United States of America
- Center for Neurotechnology, Seattle, WA 98195, United States of America
| | - Lisa Young
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA 98195, United States of America
| | - Viet Dang
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA 98195, United States of America
| | - Amanda E Fischedick
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA 98195, United States of America
| | - Nicholas M Tolley
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA 98195, United States of America
- Center for Neurotechnology, Seattle, WA 98195, United States of America
| | - Tian Wang
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA 98195, United States of America
| | - Madison A Bravo
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA 98195, United States of America
- Center for Neurotechnology, Seattle, WA 98195, United States of America
| | - Dalton Lee
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA 98195, United States of America
| | - Belinda Tucker
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA 98195, United States of America
| | - Megan Knoernschild
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA 98195, United States of America
| | - Benjamin D Pedigo
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA 98195, United States of America
- Center for Neurotechnology, Seattle, WA 98195, United States of America
| | - Philip J Horner
- Center for Neuroregeneration, Department of Neurological Surgery, Houston Methodist Research Institute, Houston, TX 77030, United States of America
| | - Chet T Moritz
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA 98195, United States of America
- Center for Neurotechnology, Seattle, WA 98195, United States of America
- Department of Electrical and Computer Engineering, University of Washington, Seattle, WA 98195, United States of America
- Department of Physiology and Biophysics, University of Washington, Seattle, WA 98195, United States of America
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Al-Falahi Z, Tran H, Middleton P, Basilakis J, Lo S, Dang V, Joseph V, Femia G, Nia A, Moore N, Houltham J, Silva R. Corrigendum to ‘Automation of Optical Coherence Tomography (OCT) Tissued Morphology and Vessel Sizing With Artificial Intelligence’ [Heart, Lung and Circulation volume 31 (2022) S321-S322]. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Allenspach K, Borcherding DC, Iennarella-Servantez CA, Mosichuk AP, Atherly T, Sahoo DK, Kathrani A, Suchodolski JS, Bourgois-Mochel A, Serao MR, Serao NV, Willette A, Perez BA, Gabriel V, Mao S, Kilburn L, Dang V, Borts D, Almada LL, Fernandez-Zapico ME, Phillips GJ, Jergens AE, Mochel JP. Ketogenic diets in healthy dogs induce gut and serum metabolome changes suggestive of anti-tumourigenic effects: A model for human ketotherapy trials. Clin Transl Med 2022; 12:e1047. [PMID: 36149786 PMCID: PMC9506423 DOI: 10.1002/ctm2.1047] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 08/15/2022] [Accepted: 08/23/2022] [Indexed: 12/02/2022] Open
Affiliation(s)
- Karin Allenspach
- Departments, of Veterinary Clinical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA
| | - Dana C Borcherding
- Department of Biomedical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA
| | - Chelsea A Iennarella-Servantez
- Department of Biomedical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA.,Royal Veterinary College, University of London, London, UK
| | - Allison P Mosichuk
- Departments, of Veterinary Clinical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA
| | - Todd Atherly
- Departments, of Veterinary Clinical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA
| | - Dipak Kumar Sahoo
- Department of Biomedical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA
| | - Aarti Kathrani
- Royal Veterinary College, University of London, London, UK
| | - Jan S Suchodolski
- Gastrointestinal Laboratory, Texas A&M University, College of Veterinary Medicine & Biomedical Sciences, College Station, Texas, USA
| | - Agnes Bourgois-Mochel
- Departments, of Veterinary Clinical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA
| | | | - Nick V Serao
- Department of Animal Science, Iowa State University, Ames, Iowa, USA
| | - Auriel Willette
- Food Science and Human Nutrition, Iowa State University, Ames, Iowa, USA
| | - Beatriz Agulla Perez
- Departments, of Veterinary Clinical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA
| | - Vojtech Gabriel
- Departments, of Veterinary Clinical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA
| | - Sichao Mao
- Departments, of Veterinary Clinical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA
| | - Logan Kilburn
- Department of Animal Science, Iowa State University, Ames, Iowa, USA
| | - Viet Dang
- Veterinary Diagnostics Laboratory, Iowa State University, Ames, Iowa, USA
| | - David Borts
- Veterinary Diagnostics Laboratory, Iowa State University, Ames, Iowa, USA
| | - Luciana L Almada
- Schulze Center for Novel Therapeutics, Division of Oncology Research, Mayo Clinic, Rochester, Minnesota, USA
| | - Martin E Fernandez-Zapico
- Schulze Center for Novel Therapeutics, Division of Oncology Research, Mayo Clinic, Rochester, Minnesota, USA
| | - Gregory J Phillips
- Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames, Iowa, USA
| | - Albert E Jergens
- Departments, of Veterinary Clinical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA
| | - Jonathan P Mochel
- Department of Biomedical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA
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Al-Falahi Z, Tran H, Middleton P, Basilakis J, Lo S, Dang V, Joseph V, Fema G, Nia A, Moore N, Houltham J, Silva R. Automation of Optical Coherence Tomography (OCT) Tissued Morphology and Vessel Sizing With Artificial Intelligence. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.06.561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Dang V, Pender P, Hopkins A, Rajaratnam R, Leung D, Lo S. Percutaneous Coronary Intervention (PCI) for Spontaneous Coronary Artery Dissection (SCAD) Induced Acute Coronary Syndrome (ACS): 21 Year Experience in a Single Australian Centre. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.06.610] [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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Dang V, Péricart S, Manceau C, Aziza R, Lagarde S, Doumerc N, Matthieu T, Gamé X, Soulié M, Malavaud B, Guillaume P, Roumiguié M. Quel est le risque d’avoir un cancer de la prostate significatif après une série de biopsies ciblées négatives ? Étude d’une population de 394 cas. Prog Urol 2021. [DOI: 10.1016/j.purol.2021.08.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Diana P, Breda A, Territo A, Gallioli A, Piana A, Gaya J, Gavrilov P, Desender L, Van Parys B, Van Praet C, Khene Z, Dang V, Doumerc N, Decaestecker K. Intracorporeal versus extracorporeal robot-assisted kidney auto transplantation: Experience of the ERUS RAKT working group. EUR UROL SUPPL 2021. [DOI: 10.1016/s2666-1683(21)02272-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Nimbalkar S, Samejima S, Dang V, Hunt T, Nunez O, Moritz C, Kassegne S. Graphene on glassy carbon microelectrodes demonstrate long-term structural and functional stability in neurophysiological recording and stimulation. J Neural Eng 2021; 18. [PMID: 34492644 DOI: 10.1088/1741-2552/ac245a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 09/07/2021] [Indexed: 11/12/2022]
Abstract
Objective.There is a growing interest in the use of carbon and its allotropes for microelectrodes in neural probes because of their inertness, long-term electrical and electrochemical stability, and versatility. Building on this interest, we introduce a new electrode material system consisting of an ultra-thin monoatomic layer of graphene (Gr) mechanically supported by a relatively thicker layer of glassy carbon (GC).Approach.Due to its high electrical conductivity and high double-layer capacitance, Gr has impressive electrical and electrochemical properties, two key properties that are useful for neural recording and stimulation applications. However, because of its two-dimensional nature, Gr exhibits a lack of stiffness in the transverse direction and hence almost non-existent flexural and out-of-plane rigidity that will severely limit its wider use. On the other hand, GC is one of carbon's important allotropes and consists of three-dimensional microstructures of Gr fragments with a natural molecular similarity to Gr. Further, GC has exceptional chemical inertness, good electrical properties, high electrochemical stability, purely capacitive charge injection, and fast surface electrokinetics coupled with lithography patternability. This makes GC an ideal candidate for addressing Gr's lack of out-of-plane rigidity through providing a matching sturdier and robust mechanical backing. Combining the strengths of these two allotropes of carbon, we introduce a new neural probe that consists of ∼1 nm thick layer of patterned Gr microelectrodes supported by another layer of 3-5μm thick patterned GC.Main results. We present the fabrication technology for the newGr on GC(graphene on glassy carbon) microelectrodes and the accompanying pattern transfer technology on flexible substrate and report on the bond between these two allotropes of carbon through FTIR, surface morphology through SEM, topography through atomic force microscopy, and microstructure imaging through scanning transmission electron microscopy. A long-term (18 weeks)in vivostudy of the use of theseGr on GCmicroelectrodes assessed the quality of the electrocorticography-based neural signal recording and stimulation through electrophysiological measurements. The probes were demonstrated to be functionally and structurally stable over the 18 week period with minimal glial response-the longest reported so far for Gr-based microelectrodes.Significance.TheGr on GCmicroelectrodes presented here offers a compelling case for expanding the potentials of Gr-based technology in the broad areas of neural probes.
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Affiliation(s)
- Surabhi Nimbalkar
- NanoFAB.SDSU Research Lab, Department of Mechanical Engineering, College of Engineering, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, United States of America.,NSF-ERC Center for Neurotechnology (CNT), Seattle, WA 98195, United States of America
| | - Soshi Samejima
- Departments of Electrical & Computer Engineering, and Rehabilitation Medicine, University of Washington, Seattle, WA, United States of America.,NSF-ERC Center for Neurotechnology (CNT), Seattle, WA 98195, United States of America
| | - Viet Dang
- Departments of Electrical & Computer Engineering, and Rehabilitation Medicine, University of Washington, Seattle, WA, United States of America.,NSF-ERC Center for Neurotechnology (CNT), Seattle, WA 98195, United States of America
| | - Trevor Hunt
- NanoFAB.SDSU Research Lab, Department of Mechanical Engineering, College of Engineering, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, United States of America.,NSF-ERC Center for Neurotechnology (CNT), Seattle, WA 98195, United States of America
| | - Omar Nunez
- NanoFAB.SDSU Research Lab, Department of Mechanical Engineering, College of Engineering, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, United States of America.,NSF-ERC Center for Neurotechnology (CNT), Seattle, WA 98195, United States of America
| | - Chet Moritz
- Departments of Electrical & Computer Engineering, and Rehabilitation Medicine, University of Washington, Seattle, WA, United States of America.,Departments of Physiology Biophysics, University of Washington, Seattle, WA, United States of America.,NSF-ERC Center for Neurotechnology (CNT), Seattle, WA 98195, United States of America
| | - Sam Kassegne
- NanoFAB.SDSU Research Lab, Department of Mechanical Engineering, College of Engineering, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, United States of America.,NSF-ERC Center for Neurotechnology (CNT), Seattle, WA 98195, United States of America
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Ho T, Pham T, Le K, Ly T, Le H, Nguyen D, Ho V, Dang V, Phung T, Norman R, Mol B, Vuong L. O-233 Micronized progesterone plus dydrogesterone versus micronized progesterone alone for luteal phase support in frozen-thawed cycles: a prospective cohort study. Hum Reprod 2021. [DOI: 10.1093/humrep/deab128.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Study question
Does the addition of oral dydrogesterone to vaginal progesterone as luteal phase support improve pregnancy outcomes during frozen embryo transfer (FET) cycles compared with vaginal progesterone alone?
Summary answer
Luteal phase support with oral dydrogesterone added to vaginal progesterone improves live birth rates and reduces miscarriage rates compared with vaginal progesterone alone.
What is known already
Progesterone is an important hormone that triggers secretory transformation of the endometrium to allow implantation of the embryo. During in vitro fertilization (IVF), exogenous progesterone is administered for luteal phase support. However, there is wide inter-individual variation in absorption of progesterone via the vaginal wall. Oral dydrogesterone is effective and well tolerated when used to provide luteal phase support after fresh embryo transfer. However, there are currently no data on the effectiveness of luteal phase support with the combination of dydrogesterone with vaginal micronized progesterone compared with vaginal micronized progesterone after FET.
Study design, size, duration
Prospective cohort study conducted at an academic infertility center in Vietnam from 26 June 2019 to 30 March 2020.
Participants/materials, setting, methods
We studied 1364 women undergoing IVF with FET. The luteal support regimen was either vaginal micronized progesterone 400 mg twice daily plus oral dydrogesterone 10 mg twice daily (second part of the study) or vaginal micronized progesterone 400 mg twice daily (first 4 months of the study). The primary endpoint was live birth after the first FET of the started cycle, with miscarriage <12 weeks as one of the secondary endpoints.
Main results and the role of chance
The vaginal progesterone + dydrogesterone group and vaginal progesterone groups included 732 and 632 participants, respectively. Live birth rates were 46.3% versus 41.3%, respectively (rate ratio [RR] 1.12, 95% confidence interval [CI] 0.99–1.27, p = 0.06; multivariate analysis RR 1.30 (95% CI 1.01–1.68), p = 0.042), with a statistically significant lower rate of miscarriage at < 12 weeks (3.4% vs 6.6%; RR 0.51, 95% CI 0.32–0.83; p = 0.009). Birth weight of both singletons (2971.0 ± 628.4 vs. 3118.8 ± 559.2 g; p = 0.004) and twins (2175.5 ± 494.8 vs. 2494.2 ± 584.7; p = 0.002) was significantly lower in the progesterone plus dydrogesterone versus progesterone group.
Limitations, reasons for caution
The study were the open-label design and the non-randomized nature of the sequential administration of study treatments. However, our systematic comparison of the two strategies was able to be performed much more rapidly than a conventional randomized controlled trial. In addition, the single ethnicity population limits external generalizability.
Wider implications of the findings
Oral dydrogesterone in addition to vaginal progesterone as luteal phase support in FET cycles can reduce the miscarriage rate and improve the live birth rate. Carefully planned prospective cohort studies with limited bias could be used as an alternative to randomized controlled clinical trials to inform clinical practice.
Trial registration number
NCT03998761
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Affiliation(s)
- T Ho
- My Duc Hospital, IVFMD and HOPE Research Center, Ho Chi Minh, Vietnam
| | - T Pham
- My Duc Hospital, HOPE Research Center, Ho Chi Minh, Vietnam
| | - K Le
- My Duc Hospital, IVFMD Centre, Ho Chi Minh, Vietnam
| | - T Ly
- My Duc Hospital, IVFMD Centre, Ho Chi Minh, Vietnam
| | - H Le
- My Duc Hospital, IVFMD Centre, Ho Chi Minh, Vietnam
| | - D Nguyen
- My Duc Hospital, HOPE Research Center, Ho Chi Minh, Vietnam
| | - V Ho
- My Duc Hospital, IVFMD and HOPE Research Center, Ho Chi Minh, Vietnam
| | - V Dang
- My Duc Hospital, IVFMD and HOPE Research Center, Ho Chi Minh, Vietnam
| | - T Phung
- My Duc Hospital, IVFMD Centre, Ho Chi Minh, Vietnam
| | - R Norman
- The University of Adelaide, Robinson Research Institute and Adelaide Medical School, Adelaide, Australia
| | - B Mol
- Monash University, Department of Obstetrics & Gynaecology, Clayton, Australia
| | - L Vuong
- University of Medicine and Pharmacy at Ho Chi Minh City, Department of Obstetrics and Gynecology, Ho Chi Minh City, Vietnam
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Tran T, Le N, Lo S, Rajaratnam R, Juergens C, Premawardhana U, Shalaby G, Dang V, Vijayarajan V, Al-Falahi Z, Burns A, Johnson R, Hu Q, Sechi R, Narayanan SS. Cardi Bot: A Natural Language Application That Answers Your Cardiology Questions. Heart Lung Circ 2021. [DOI: 10.1016/j.hlc.2021.06.427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Brassier M, Khene Z, Bernhard J, Nouhaud F, Olivier J, Villers A, Dang V, Doumerc N, Bensalah K, Bigot P. Caractéristiques cliniques, radiologiques et anatomopathologiques des patients récidivants après néphrectomie partielle pour carcinome rénal. Prog Urol 2020. [DOI: 10.1016/j.purol.2020.07.209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Seizilles de Mazancourt E, Pradere B, Duquesne I, Pinar U, Felber M, Plassais C, Dang V, Ali Benali N, Berchiche W, Gaillard C, Mauger de Varennes A, Margue G, Bardet F, Hulin M, Manuguerra A, Wandoren W, Chabenes M, Sbizzera M, Khene Z, Matillon X. Heure limite de prise en charge opératoire pour torsion du cordon spermatique : résultats d’une série rétrospective multicentrique de 2986 patients sur 15 ans. Prog Urol 2020. [DOI: 10.1016/j.purol.2020.07.206] [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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Mauger de Varennes A, Khene Z, Pradere B, Lannes F, Freton L, Dang V, Berchiche W, Ortier E, Michiels C, Margue G, Gaillard C, Ali Benali N, Bardet F, Hulin M, Gaillard V, Manuguerra A, Pinar U, Duquesne I, Felber M, Plassais C. Marqueurs biologiques préopératoires prédictifs de la viabilité testiculaire suite à une torsion du cordon spermatique. Prog Urol 2020. [DOI: 10.1016/j.purol.2020.07.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Dang V, Khene Z, Van Pary B, Van Besien J, Decaestecker K, Tailly T, Beysens M, Sallusto F, Soulié M, Gamé X, Hoebeke P, Doumerc N. Auto-transplantation rénale robot-assistée comme future approche de chirurgie à visée d’épargne néphronique : étude d’une série de 19 cas. Prog Urol 2020. [DOI: 10.1016/j.purol.2020.07.124] [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: 11/17/2022]
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Ambrosini YM, Neuber S, Borcherding D, Seo YJ, Segarra S, Glanemann B, Garden OA, Müller U, Adam MG, Dang V, Borts D, Atherly T, Willette AA, Jergens A, Mochel JP, Allenspach K. Treatment With Hydrolyzed Diet Supplemented With Prebiotics and Glycosaminoglycans Alters Lipid Metabolism in Canine Inflammatory Bowel Disease. Front Vet Sci 2020; 7:451. [PMID: 32851029 PMCID: PMC7406657 DOI: 10.3389/fvets.2020.00451] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Accepted: 06/22/2020] [Indexed: 12/26/2022] Open
Abstract
Canine inflammatory bowel disease (IBD) is a chronic, immunologically mediated intestinal disorder, resulting from the complex interaction of genetic, environmental and immune factors. Hydrolyzed diets are used in dogs with food-responsive diarrhea (FRD) to reduce adverse responses to immunostimulatory proteins. Prebiotics (PRBs) and glycosaminoglycans (GAGs) have previously been demonstrated to show anti-inflammatory activity in the intestinal mucosa. Notably, hydrolyzed diets combined with the administration of PRBs and GAGs offer a promising approach for the treatment of canine IBD. Our aim was to investigate the effects of hydrolyzed diet and GAG+PRB co-treatment on the serum metabolomic profile of IBD dogs. Dogs with IBD randomly received either hydrolyzed diet supplemented with GAGs and PRBs (treatment 1) or hydrolyzed diet alone (treatment 2) for 10 weeks. A targeted metabolomics approach using mass spectrometry was performed to quantify changes in the serum metabolome before and after treatment and between treatment 1 and 2. Principal component analysis (PCA), partial least squares-discriminant analysis (PLS-DA), hierarchical cluster analysis (HCA) and univariate statistics were used to identify differences between the treatment groups. PCA, PLS-DA, and HCA showed a clear clustering of IBD dogs before and after hydrolyzed diet, indicating that the treatment impacted the serum metabolome. Univariate analysis revealed that most of the altered metabolites were involved in lipid metabolism. The most impacted lipid classes were components of cell membranes, including glycerophospholipids, sphingolipids, and di- and triglycerides. In addition, changes in serum metabolites after GAG+PRB co-treatment suggested a possible additional beneficial effect on the lipid metabolism in IBD dogs. In conclusion, the present study showed a significant increase in metabolites that protect gut cell membrane integrity in response to hydrolyzed diet alone or in combination with GAG+PRB co-treatment. Administration of such treatment over 70 days improved selected serum biomarkers of canine IBD, possibly indicating improved intestinal membrane integrity.
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Affiliation(s)
- Yoko M. Ambrosini
- Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | | | - Dana Borcherding
- Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Yeon-Jung Seo
- Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | | | | | - Oliver A. Garden
- Department of Clinical Studies and Advanced Medicine, University of Pennsylvania College of Veterinary Medicine, Philadelphia, PA, United States
| | - Udo Müller
- Biocrates Life Sciences AG, Innsbruck, Austria
| | | | - Viet Dang
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - David Borts
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Todd Atherly
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Auriel A. Willette
- Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
- Department of Food Science and Human Nutrition, College of Human Sciences, Iowa State University, Ames, IA, United States
| | - Albert Jergens
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Jonathan P. Mochel
- Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Karin Allenspach
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
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Shugman I, Tran T, Broyd P, Dang V, Nguyen T, Premawardhana U. 797 Cardiac Invasive Electrophysiology Studies and Radiofrequency Catheter Ablation - Single Centre Experience. Heart Lung Circ 2020. [DOI: 10.1016/j.hlc.2020.09.804] [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: 10/23/2022]
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Tran T, Al-Fahali Z, Tessa Pei-Yi L, Kachwalla H, Shugman I, Dang V, Vijayarajan V, Premawardhana U. 285 An Unusual Cause of Shortness of Breath. Heart Lung Circ 2020. [DOI: 10.1016/j.hlc.2020.09.292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Thompson JW, Adams KJ, Adamski J, Asad Y, Borts D, Bowden JA, Byram G, Dang V, Dunn WB, Fernandez F, Fiehn O, Gaul DA, Hühmer AFR, Kalli A, Koal T, Koeniger S, Mandal R, Meier F, Naser FJ, O’Neil D, Pal A, Patti GJ, Pham-Tuan H, Prehn C, Raynaud FI, Shen T, Southam AD, St. John-Williams L, Sulek K, Vasilopoulou CG, Viant M, Winder CL, Wishart D, Zhang L, Zheng J, Moseley MA. International Ring Trial of a High Resolution Targeted Metabolomics and Lipidomics Platform for Serum and Plasma Analysis. Anal Chem 2019; 91:14407-14416. [PMID: 31638379 PMCID: PMC7310668 DOI: 10.1021/acs.analchem.9b02908] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A challenge facing metabolomics in the analysis of large human cohorts is the cross-laboratory comparability of quantitative metabolomics measurements. In this study, 14 laboratories analyzed various blood specimens using a common experimental protocol provided with the Biocrates AbsoluteIDQ p400HR kit, to quantify up to 408 metabolites. The specimens included human plasma and serum from male and female donors, mouse and rat plasma, as well as NIST SRM 1950 reference plasma. The metabolite classes covered range from polar (e.g., amino acids and biogenic amines) to nonpolar (e.g., diacyl- and triacyl-glycerols), and they span 11 common metabolite classes. The manuscript describes a strict system suitability testing (SST) criteria used to evaluate each laboratory's readiness to perform the assay, and provides the SST Skyline documents for public dissemination. The study found approximately 250 metabolites were routinely quantified in the sample types tested, using Orbitrap instruments. Interlaboratory variance for the NIST SRM-1950 has a median of 10% for amino acids, 24% for biogenic amines, 38% for acylcarnitines, 25% for glycerolipids, 23% for glycerophospholipids, 16% for cholesteryl esters, 15% for sphingolipids, and 9% for hexoses. Comparing to consensus values for NIST SRM-1950, nearly 80% of comparable analytes demonstrated bias of <50% from the reference value. The findings of this study result in recommendations of best practices for system suitability, quality control, and calibration. We demonstrate that with appropriate controls, high-resolution metabolomics can provide accurate results with good precision across laboratories, and the p400HR therefore is a reliable approach for generating consistent and comparable metabolomics data.
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Affiliation(s)
- J. Will Thompson
- Duke Proteomics and Metabolomics Shared Resource, Duke School of Medicine, 701 W Main Street, Durham, NC 27701
- Department of Pharmacology and Cancer Biology, Duke School of Medicine, Durham, NC
| | - Kendra J. Adams
- Duke Proteomics and Metabolomics Shared Resource, Duke School of Medicine, 701 W Main Street, Durham, NC 27701
| | - Jerzy Adamski
- Research Unit Molecular Endocrinology and Metabolism, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Lehrstuhl für Experimentelle Genetik, Technische Universität München, 85350 Freising-Weihenstephan, Germany
- German Center for Diabetes Research (DZD), 85764 München-Neuherberg, Germany
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Yasmin Asad
- Drug Metabolism Pharmacokinetics and Metabolomics group, Cancer Research UK Cancer Therapeutics Unit, The Institute for Cancer Research, 15 Cotswold Road, Sutton Surrey, SM2 5NG, UK
| | - David Borts
- College of Veterinary Medicine, Iowa State University, Ames, IA 50011
- Thermo Fisher Scientific, San Jose, CA
| | - John A. Bowden
- National Institute of Standards and Technology, Hollings Marine Laboratory, 331 Fort Johnson Road, Charleston, SC 29412, United States
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, 1333 Center Road, University of Florida, Gainesville, Florida 32610, United States
| | - Gregory Byram
- UC Davis Genome Center – Metabolomics, Davis, CA 95618
| | - Viet Dang
- College of Veterinary Medicine, Iowa State University, Ames, IA 50011
| | | | - Facundo Fernandez
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332-0400
| | - Oliver Fiehn
- UC Davis Genome Center – Metabolomics, Davis, CA 95618
| | - David A. Gaul
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332-0400
| | | | | | | | | | - Rupasri Mandal
- Department of Computing Science, Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E8
| | - Florian Meier
- Max Planck Institute of Biochemistry, Munich, Germany
| | - Fuad J. Naser
- Washington University, Departments of Chemistry, Genetics, and Medicine. Saint Louis, Missouri 63110 USA
| | - Donna O’Neil
- University of Birmingham and Phenome Centre Birmingham, UK
| | - Akos Pal
- Drug Metabolism Pharmacokinetics and Metabolomics group, Cancer Research UK Cancer Therapeutics Unit, The Institute for Cancer Research, 15 Cotswold Road, Sutton Surrey, SM2 5NG, UK
| | - Gary J. Patti
- Washington University, Departments of Chemistry, Genetics, and Medicine. Saint Louis, Missouri 63110 USA
| | | | - Cornelia Prehn
- Research Unit Molecular Endocrinology and Metabolism, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Florence I. Raynaud
- Drug Metabolism Pharmacokinetics and Metabolomics group, Cancer Research UK Cancer Therapeutics Unit, The Institute for Cancer Research, 15 Cotswold Road, Sutton Surrey, SM2 5NG, UK
| | - Tong Shen
- UC Davis Genome Center – Metabolomics, Davis, CA 95618
| | | | - Lisa St. John-Williams
- Duke Proteomics and Metabolomics Shared Resource, Duke School of Medicine, 701 W Main Street, Durham, NC 27701
| | - Karolina Sulek
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Denmark
| | | | - Mark Viant
- University of Birmingham and Phenome Centre Birmingham, UK
| | | | - David Wishart
- Department of Computing Science, Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E8
| | - Lun Zhang
- Department of Computing Science, Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E8
| | - Jiamin Zheng
- Department of Computing Science, Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E8
| | - M. Arthur Moseley
- Duke Proteomics and Metabolomics Shared Resource, Duke School of Medicine, 701 W Main Street, Durham, NC 27701
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Dang V. EP1.03-32 Prevalence of EGFR and ALK Mutations in Non Small Cell Lung Cancer in Viet Nam National Cancer Hospital. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.2113] [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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Nguyen K, Bui T, Tran P, Dao V, Dang V. EP1.01-16 Characteristics of Stage III Lung Cancer Patients in the Period 2014-2016 in Vietnam. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Greer JB, Magnuson JT, Hester K, Giroux M, Pope C, Anderson T, Liu J, Dang V, Denslow ND, Schlenk D. Effects of Chlorpyrifos on Cholinesterase and Serine Lipase Activities and Lipid Metabolism in Brains of Rainbow Trout (Oncorhynchus mykiss). Toxicol Sci 2019; 172:146-154. [PMID: 31359069 PMCID: PMC6813751 DOI: 10.1093/toxsci/kfz167] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 06/08/2019] [Accepted: 07/09/2019] [Indexed: 12/20/2022] Open
Abstract
Chlorpyrifos is an organophosphorus insecticide that elicits acute toxicity through inhibition of acetylcholinesterase (AChE), leading to acetylcholine accumulation and prolonged stimulation of cholinergic receptors throughout the central and peripheral nervous systems. Previous studies have indicated that neurodevelopment may also be impaired through alternative pathways, including reduction of cAMP catalyzed downstream events. The upstream initiating events that underlie non-cholinergic neurological actions of chlorpyrifos and other organophosphorus compounds remain unclear. To investigate the potential role of disruption of fatty acid signaling as a mechanism of toxicity, lipid metabolism and fatty acid profiles were examined to identify alterations that may play a critical role in upstream signaling in the CNS. Juvenile rainbow trout were treated for 7 days with nominal chlorpyrifos concentrations previously reported to diminish olfactory responses (10, 20, and 40 μg/L). While lethality was noted higher doses, measured chlorpyrifos concentrations of 1.38 μg/L (nominal concentration 10 μg/L) significantly reduced the activity of AChE and two serine lipases, monoacylglycerol lipase and fatty acid amide hydrolase in the brain. Reductions in lysophosphatidylethanolamines (16:0; 18:0, 18:1, and 22:6) derived from the phosphatidylethanolamines and free fatty acids (Palmitic acid16:0; Linolenic acid18:3; Eicosadienoic acid 20:2; Arachidonic acid 20:4; and Docosahexaenoic acid 22:6) were also noted, suggesting that chlorpyrifos inhibited the metabolism of selected phospholipid signaling precursors at sublethal concentrations. These results indicate that in addition to AChE inhibition, environmentally relevant chlorpyrifos exposure alters serine lipase activity and lipid metabolites in the trout brain, which may compromise neuronal signaling and impact neurobehavioral responses in aquatic animals.
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Affiliation(s)
- J B Greer
- Department of Environmental Sciences, University of California Riverside, 2460A Geology, Riverside, CA, United States
| | - J T Magnuson
- Department of Environmental Sciences, University of California Riverside, 2460A Geology, Riverside, CA, United States
| | - K Hester
- Center for Veterinary Health Sciences and Interdisciplinary Toxicology Program, Oklahoma State University, 264 McElroy Hall, Stillwater, OK, United States
| | - M Giroux
- Department of Environmental Sciences, University of California Riverside, 2460A Geology, Riverside, CA, United States
| | - C Pope
- Center for Veterinary Health Sciences and Interdisciplinary Toxicology Program, Oklahoma State University, 264 McElroy Hall, Stillwater, OK, United States
| | - T Anderson
- Center for Veterinary Health Sciences and Interdisciplinary Toxicology Program, Oklahoma State University, 264 McElroy Hall, Stillwater, OK, United States
| | - J Liu
- Center for Veterinary Health Sciences and Interdisciplinary Toxicology Program, Oklahoma State University, 264 McElroy Hall, Stillwater, OK, United States
| | - V Dang
- Department of Physiological Sciences and Center for Environmental and Human Toxicology, University of Florida, PO Box 110885, 2187 Mowry Rd., Gainesville, FL, United States
| | - N D Denslow
- Department of Physiological Sciences and Center for Environmental and Human Toxicology, University of Florida, PO Box 110885, 2187 Mowry Rd., Gainesville, FL, United States
| | - D Schlenk
- Department of Environmental Sciences, University of California Riverside, 2460A Geology, Riverside, CA, United States.,Institute of Environmental Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China
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Dang V, Dao T, Ha K, Nguyen T, Tran T, Nguyen H. Neoadjuvant treatment breast cancer: a retrospective study in Vietnam National Cancer Hospital. Breast 2019. [DOI: 10.1016/s0960-9776(19)30272-3] [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: 10/27/2022] Open
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Pender P, Faour A, Gibbs O, Dang V, Hopkins A, Leung D, Mussap C, French J, Juergens C, Lo S. Use of Mechanical Cardiac Support (MCS) for ST-elevated Myocardial Infarction with Cardiogenic Shock(STEMI-CS) in a Non-transplant Centre. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.06.710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Pender P, Gibbs O, Faour A, Dang V, Hopkins A, Leung D, Mussap C, French J, Juergens C, Lo S. Mechanical Circulatory Support for Semi – elective PCI in High-risk Patients with Extracorporeal Membranous Oxygenation (ECMO) Compared to Impella Heart Pump Device. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.06.656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Feswick A, Isaacs M, Biales A, Flick RW, Bencic DC, Wang RL, Vulpe C, Brown-Augustine M, Loguinov A, Falciani F, Antczak P, Herbert J, Brown L, Denslow ND, Kroll KJ, Lavelle C, Dang V, Escalon L, Garcia-Reyero N, Martyniuk CJ, Munkittrick KR. How consistent are we? Interlaboratory comparison study in fathead minnows using the model estrogen 17α-ethinylestradiol to develop recommendations for environmental transcriptomics. Environ Toxicol Chem 2017; 36:2614-2623. [PMID: 28316117 PMCID: PMC6145073 DOI: 10.1002/etc.3799] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 08/14/2016] [Revised: 09/27/2016] [Accepted: 03/17/2017] [Indexed: 05/26/2023]
Abstract
Fundamental questions remain about the application of omics in environmental risk assessments, such as the consistency of data across laboratories. The objective of the present study was to determine the congruence of transcript data across 6 independent laboratories. Male fathead minnows were exposed to a measured concentration of 15.8 ng/L 17α-ethinylestradiol (EE2) for 96 h. Livers were divided equally and sent to the participating laboratories for transcriptomic analysis using the same fathead minnow microarray. Each laboratory was free to apply bioinformatics pipelines of its choice. There were 12 491 transcripts that were identified by one or more of the laboratories as responsive to EE2. Of these, 587 transcripts (4.7%) were detected by all laboratories. Mean overlap for differentially expressed genes among laboratories was approximately 50%, which improved to approximately 59.0% using a standardized analysis pipeline. The dynamic range of fold change estimates was variable between laboratories, but ranking transcripts by their relative fold difference resulted in a positive relationship for comparisons between any 2 laboratories (mean R2 > 0.9, p < 0.001). Ten estrogen-responsive genes encompassing a fold change range from dramatic (>20-fold; e.g., vitellogenin) to subtle (∼2-fold; i.e., block of proliferation 1) were identified as differentially expressed, suggesting that laboratories can consistently identify transcripts that are known a priori to be perturbed by a chemical stressor. Thus, attention should turn toward identifying core transcriptional networks using focused arrays for specific chemicals. In addition, agreed-on bioinformatics pipelines and the ranking of genes based on fold change (as opposed to p value) should be considered in environmental risk assessment. These recommendations are expected to improve comparisons across laboratories and advance the use of omics in regulations. Environ Toxicol Chem 2017;36:2593-2601. © 2017 SETAC.
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Affiliation(s)
- April Feswick
- Department of Biology, University of New Brunswick, Saint John, New Brunswick, Canada
| | - Meghan Isaacs
- Department of Biology, University of New Brunswick, Saint John, New Brunswick, Canada
| | - Adam Biales
- Molecular Indicators Research Branch, National Exposure Research Laboratory, Cincinnati, Ohio, USA
| | - Robert W Flick
- Molecular Indicators Research Branch, National Exposure Research Laboratory, Cincinnati, Ohio, USA
| | - David C Bencic
- Molecular Indicators Research Branch, National Exposure Research Laboratory, Cincinnati, Ohio, USA
| | - Rong-Lin Wang
- Molecular Indicators Research Branch, National Exposure Research Laboratory, Cincinnati, Ohio, USA
| | - Chris Vulpe
- Department of Nutritional Science and Toxicology, University of California-Berkeley, Berkeley, California, USA
| | - Marianna Brown-Augustine
- Department of Nutritional Science and Toxicology, University of California-Berkeley, Berkeley, California, USA
| | - Alex Loguinov
- Department of Nutritional Science and Toxicology, University of California-Berkeley, Berkeley, California, USA
| | - Francesco Falciani
- Institute of Integrative Biology, University of Liverpool, Liverpool, United Kingdom
| | - Philipp Antczak
- Institute of Integrative Biology, University of Liverpool, Liverpool, United Kingdom
| | - John Herbert
- Institute of Integrative Biology, University of Liverpool, Liverpool, United Kingdom
| | - Lorraine Brown
- Pacific Environmental Science Centre, North Vancouver, British Columbia, Canada
| | - Nancy D Denslow
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, UF Genetics Institute, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Kevin J Kroll
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, UF Genetics Institute, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Candice Lavelle
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, UF Genetics Institute, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Viet Dang
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, UF Genetics Institute, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Lynn Escalon
- US Army Engineer Research & Development Center, Vicksburg, Mississippi
| | - Natàlia Garcia-Reyero
- US Army Engineer Research & Development Center, Vicksburg, Mississippi
- Institute for Genomics, Biocomputing and Biotechnology, Mississippi State University, Starkville, Mississippi, USA
| | - Christopher J Martyniuk
- Department of Biology, University of New Brunswick, Saint John, New Brunswick, Canada
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, UF Genetics Institute, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Kelly R Munkittrick
- Department of Biology, University of New Brunswick, Saint John, New Brunswick, Canada
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Nosheny RL, Belichenko PV, Busse BL, Weissmiller AM, Dang V, Das D, Fahimi A, Salehi A, Smith SJ, Mobley WC. Increased cortical synaptic activation of TrkB and downstream signaling markers in a mouse model of Down Syndrome. Neurobiol Dis 2015; 77:173-90. [PMID: 25753471 DOI: 10.1016/j.nbd.2015.02.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 02/15/2015] [Accepted: 02/25/2015] [Indexed: 01/01/2023] Open
Abstract
Down Syndrome (DS), trisomy 21, is characterized by synaptic abnormalities and cognitive deficits throughout the lifespan and with development of Alzheimer's disease (AD) neuropathology and progressive cognitive decline in adults. Synaptic abnormalities are also present in the Ts65Dn mouse model of DS, but which synapses are affected and the mechanisms underlying synaptic dysfunction are unknown. Here we show marked increases in the levels and activation status of TrkB and associated signaling proteins in cortical synapses in Ts65Dn mice. Proteomic analysis at the single synapse level of resolution using array tomography (AT) uncovered increased colocalization of activated TrkB with signaling endosome related proteins, and demonstrated increased TrkB signaling. The extent of increases in TrkB signaling differed in each of the cortical layers examined and with respect to the type of synapse, with the most marked increases seen in inhibitory synapses. These findings are evidence of markedly abnormal TrkB-mediated signaling in synapses. They raise the possibility that dysregulated TrkB signaling contributes to synaptic dysfunction and cognitive deficits in DS.
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Affiliation(s)
- R L Nosheny
- Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA; Department of Molecular and Cellular Physiology, Stanford University, 279 Campus Drive, Stanford, CA 94305, USA.
| | - P V Belichenko
- Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - B L Busse
- Department of Molecular and Cellular Physiology, Stanford University, 279 Campus Drive, Stanford, CA 94305, USA
| | - A M Weissmiller
- Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - V Dang
- Department of Psychiatry & Behavioral Sciences, Stanford Medical School, VA Palo Alto Health Care System, 3801 Miranda Avenue, Palo Alto, CA 94304, USA
| | - D Das
- Department of Psychiatry & Behavioral Sciences, Stanford Medical School, VA Palo Alto Health Care System, 3801 Miranda Avenue, Palo Alto, CA 94304, USA
| | - A Fahimi
- Department of Psychiatry & Behavioral Sciences, Stanford Medical School, VA Palo Alto Health Care System, 3801 Miranda Avenue, Palo Alto, CA 94304, USA
| | - A Salehi
- Department of Psychiatry & Behavioral Sciences, Stanford Medical School, VA Palo Alto Health Care System, 3801 Miranda Avenue, Palo Alto, CA 94304, USA
| | - S J Smith
- Department of Molecular and Cellular Physiology, Stanford University, 279 Campus Drive, Stanford, CA 94305, USA
| | - W C Mobley
- Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
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Dang V, Bahl A. 324 A Retrospective Review of Variables Impacting Patient Care in the Emergency Department With the Annual Change in Resident Staffing. Ann Emerg Med 2014. [DOI: 10.1016/j.annemergmed.2014.07.352] [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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Strifler L, Morris SK, Dang V, Tu HT, Minhas R, Jamieson FB, Deeks SL, Crowcroft N, Sander B. 164: The Health Burden of Invasive Meningococcal Disease: A Systematic Review. Paediatr Child Health 2014. [DOI: 10.1093/pch/19.6.e35-160] [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: 11/13/2022] Open
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Wormsbecker A, Dang V, Jamieson F, Wilson S, Rawte P, Crowcroft NS, Johnson K, Deeks SL. Serogroup C Invasive Meningococcal Disease (IMD) In Ontario, Canada, 2000–2010: Vaccine Impact Assessment. Paediatr Child Health 2012. [DOI: 10.1093/pch/17.suppl_a.27aa] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Mate-Kole CC, Fellows RP, Said PC, McDougal J, Catayong K, Dang V, Gianesini J. Use of computer assisted and interactive cognitive training programmes with moderate to severely demented individuals: a preliminary study. Aging Ment Health 2007; 11:485-95. [PMID: 17882586 DOI: 10.1080/13607860701368422] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The purpose of this study was to investigate the potential effects of interactive cognitive training and computer-assisted programmes in reducing decline in older adults with dementia. The primary goal of this programme was to maintain participants' level of cognitive function. This study included six moderately to severely demented older adults living in a secured memory-impairment unit within an assisted living community. The participants were assessed with neuropsychological tests prior to, and immediately following, an intensive six-week cognitive training programme. The results showed that the participants improved significantly on measures of overall cognitive function, including short-term memory and cognitive failures. Caregiver reports also indicated significant improvement in the participants' behaviour signs and socialization. Additionally, these participants did not demonstrate significant decline on any of the measures from pre-test to post-test levels. This preliminary study indicates that a combined interactive cognitive training and individual-based computer training programme may effectively reduce decline and even improve some cognitive and behavioural functioning in demented older adults. A follow-up of the participants after four weeks of no training revealed some decline in some of the cognitive and behavioural measures, thus supporting the effectiveness of the training programmes.
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Affiliation(s)
- C C Mate-Kole
- Department of Psychology, Central Connecticut State University, New Britain, CT 06050, USA.
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Abstract
Electroporation is a physical event that temporarily reduces cell membrane barrier properties. Diminished membrane barrier properties are achieved by exposing cells to pulsed electric fields. When a cell has been treated with electric fields it is possible for extracellular agents to gain access to the cell interior. This process has been used in vivo to increase the uptake of chemotherapeutic agents by tumor cells which results in dramatically higher response rates than when drug is used alone. This type of treatment is called electrochemotherapy (ECT); bleomycin is most often used as the drug for this type of treatment. It was hypothesized that electroporation could be used to augment the cytotoxicity of other anticancer agents. Therefore, this study was performed in order to screen 44 different combinations of drug and cell type in vitro to identify drugs that may have higher cytotoxicity when combined with electroporation. Results from seven cell types indicate that the IC50 of bleomycin can be reduced by a factor of 100-5000 when electroporation is used to facilitate internalization. The IC50 values of cisplatin and carboplatin could be reduced by factors ranging from 3 to 13 in six different cell lines as a result of electroporation. These IC50 reductions in multiple cell lines suggest that cisplatin and carboplatin may be effective in vivo as part of ECT treatment.
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Affiliation(s)
- M J Jaroszeski
- Department of Surgery, University of South Florida, Tampa 33612-4799, USA.
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Abstract
Strains of Azotobacter vinelandii which contain defined deletions within the nifD and nifK genes which encode, respectively, the alpha and beta subunits of the MoFe protein of nitrogenase were analyzed. When synthesized without its partner, the beta subunit accumulated as a soluble beta 4 tetramer. In contrast, when the alpha subunit was present without its partner, it accumulated primarily as an insoluble aggregate. The solubility of this protein was increased by the presence of a form of the beta subunit which contained a large internal deletion, such that the alpha subunit could participate in the assembly of small amounts of an alpha 2 beta 2 holoprotein. When synthesized alone, the beta subunit was remarkably stable, even when the protein contained a large internal deletion. The alpha subunit, however, was much more rapidly degraded than the beta subunit, both when it was synthesized alone in its native background and when it was synthesized with its beta subunit partner in a foreign background. Antibodies raised against purified alpha 2 beta 2 MoFe protein recognized epitopes only on the nondenatured beta subunit and not on the nondenatured alpha subunit. Our findings that all epitopes for the alpha2beta2 tetramer appeared to be on the beta subunit, that the beta subunit assembled into beta4 tetramers, and that the alpha subunit alone was very insoluble, combined with the previous finding that the Fe protein binds to the beta subunit (A. H. Willing, M. M. Georgiadis, D. C. Rees, and J. B. Howard, J. Biol. Chem. 264:8499-8503, 1989) all suggest that the beta subunit has a more surface location than the alpha subunit in the alpha2beta2 tetramer.
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Affiliation(s)
- J G Li
- Department of Molecular Biology and Biochemistry, University of California, Irvine 92717
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