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Das T, Das S, Kumar P, C A B, Mandal D. Coal waste-derived synthesis of yellow oxidized graphene quantum dots with highly specific superoxide dismutase activity: characterization, kinetics, and biological studies. Nanoscale 2023; 15:17861-17878. [PMID: 37885430 DOI: 10.1039/d3nr04259f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
The disintegration of coal-based precursors for the scalable production of nanozymes relies on the fate of solvothermal pyrolysis. Herein, we report a novel economic and scalable strategy to fabricate yellow luminescent graphene quantum dots (YGQDs) by remediating unburnt coal waste (CW). The YGQDs (size: 7-8 nm; M.W: 3157.9 Da) were produced using in situ "anion-radical" assisted bond cleavage in water (within 8 h; at 121 °C) with yields of ∼87%. The presence of exposed surface and edge groups, such as COOH, C-O-C, and O-H, as structural defects accounted for its high fluorescence with εmax ∼530 nm at pH 7. Besides, these defects also acted as radical stabilizers, demonstrating prominent anti-oxidative activity of ∼4.5-fold higher than standard ascorbic acid (AA). In addition, the YGQDs showed high biocompatibility towards mammalian cells, with 500 μM of treatment dose showing <15% cell death. The YGQDs demonstrated specific superoxide dismutase (SOD) activity wherein 15 μM YGQDs equalled the activity of 1-unit biological SOD (bSOD), measured using the pyrogallol assay. The Km for YGQDs was ∼10-fold higher than that for bSOD. However, the YGQDs retained their SOD activity in harsh conditions like high temperatures or denaturing reactions, where the activity of bSOD is completely lost. The binding affinity of YGQDs for superoxide ions, measured from isothermal calorimetry (ITC) studies, was only 10-fold lower than that of bSOD (Kd of 586 nM vs. 57.3 nM). Further, the pre-treatment of YGQDs (∼10-25 μM) increased the cell survivability to >75-90% in three cell lines during ROS-mediated cell death, with the highest survivability being shown for C6-cells. Next, the ROS-induced apoptosis in C6-cells (model for neurodegenerative diseases study), wherein YGQDs uptake was confirmed by confocal microscopy, showed ∼5-fold apoptosis alleviation with only 5 μM pretreatment. The YGQDs also restored the expression of pro-inflammatory Th1 cytokines (TNF-α, IFN-γ, IL-6) and anti-inflammatory Th2 cytokines (IL-10) to their basal levels, with a net >3-fold change observed. This further explains the molecular mechanism for the antioxidant property of YGQDs. The high specific SOD activity associated with YGQDs may provide the cheapest alternative source for producing large-scale SOD-based nanozymes that can treat various oxidative stress-linked disorders/diseases.
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Affiliation(s)
- Tushar Das
- Department of Chemistry, National Institute of Technology Patna, Bihar 800005, India.
| | - Subrata Das
- Department of Chemistry, National Institute of Technology Patna, Bihar 800005, India.
| | - Prakash Kumar
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research Hajipur, Vaishali 844102, India.
| | - Betty C A
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Mumbai 400085, India
| | - Debabrata Mandal
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research Hajipur, Vaishali 844102, India.
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Tahir B, Reilly J, Tay J, Clinch H, Boindala N, Hughes J, Riley S, Roxby P, Tozer-Loft S, Aung T, Qureshi M, Das T, Hatton M. 146P Impact of heart, lung and oesophageal doses on overall survival (OS) of small cell lung cancer (SCLC) patients following radical chemo-radiotherapy (RT). Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.02.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Ajnakina O, Das T, Lally J, Di Forti M, Pariante CM, Marques TR, Mondelli V, David AS, Murray RM, Palaniyappan L, Dazzan P. Structural Covariance of Cortical Gyrification at Illness Onset in Treatment Resistance: A Longitudinal Study of First-Episode Psychoses. Schizophr Bull 2021; 47:1729-1739. [PMID: 33851203 PMCID: PMC8530394 DOI: 10.1093/schbul/sbab035] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Treatment resistance (TR) in patients with first-episode psychosis (FEP) is a major cause of disability and functional impairment, yet mechanisms underlying this severe disorder are poorly understood. As one view is that TR has neurodevelopmental roots, we investigated whether its emergence relates to disruptions in synchronized cortical maturation quantified using gyrification-based connectomes. Seventy patients with FEP evaluated at their first presentation to psychiatric services were followed up using clinical records for 4 years; of these, 17 (24.3%) met the definition of TR and 53 (75.7%) remained non-TR at 4 years. Structural MRI images were obtained within 5 weeks from first exposure to antipsychotics. Local gyrification indices were computed for 148 contiguous cortical regions using FreeSurfer; each subject's contribution to group-based structural covariance was quantified using a jack-knife procedure, providing a single deviation matrix for each subject. The latter was used to derive topological properties that were compared between TR and non-TR patients using a Functional Data Analysis approach. Compared to the non-TR patients, TR patients showed a significant reduction in small-worldness (Hedges's g = 2.09, P < .001) and a reduced clustering coefficient (Hedges's g = 1.07, P < .001) with increased length (Hedges's g = -2.17, P < .001), indicating a disruption in the organizing principles of cortical folding. The positive symptom burden was higher in patients with more pronounced small-worldness (r = .41, P = .001) across the entire sample. The trajectory of synchronized cortical development inferred from baseline MRI-based structural covariance highlights the possibility of identifying patients at high-risk of TR prospectively, based on individualized gyrification-based connectomes.
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Affiliation(s)
- Olesya Ajnakina
- Department of Biostatistics and Health Informatics, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK
- Department of Behavioural Science and Health, Institute of Epidemiology and Health Care, University College London, London, UK
| | - Tushar Das
- Departments of Psychiatry & Medical Biophysics, Robarts Research Institute & Lawson Health Research Institute, University of Western Ontario, London, Ontario, Canada
| | - John Lally
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK
- Department of Psychiatry, Royal College of Surgeons in Ireland, Dublin, Ireland
- Department of Psychiatry, St Vincent’s Hospital Fairview, Dublin, Ireland
- Department of Psychiatry, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Marta Di Forti
- MRC Social, Genetic & Developmental Psychiatry Centre, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK
| | - Carmine M Pariante
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, Kings College London, London, UK
| | - Tiago Reis Marques
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK
- Psychiatric Imaging Group, MRC London Institute of Medical Sciences (LMS), Hammersmith Hospital, Imperial College London, London, UK
| | - Valeria Mondelli
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, Kings College London, London, UK
| | - Anthony S David
- Institute of Mental Health, University College London, London, UK
| | - Robin M Murray
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK
- Department of Psychiatry, Experimental Biomedicine and Clinical Neuroscience, University of Palermo, Palermo, Italy
| | - Lena Palaniyappan
- Departments of Psychiatry & Medical Biophysics, Robarts Research Institute & Lawson Health Research Institute, University of Western Ontario, London, Ontario, Canada
| | - Paola Dazzan
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK
- National Institute for Health Research (NIHR) Mental Health Biomedical Research Centre at South London and Maudsley NHS Foundation Trust and King’s College London, London, UK
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Kumar B, Das T, Das S, Maniukiewicz W, Nesterov DS, Kirillov AM, Das S. Coupling 6-chloro-3-methyluracil with copper: structural features, theoretical analysis, and biofunctional properties. Dalton Trans 2021; 50:13533-13542. [PMID: 34505590 DOI: 10.1039/d1dt02018h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As nucleobases in RNA and DNA, uracil and 5-methyluracil represent a recognized class of bioactive molecules and versatile ligands for coordination compounds with various biofunctional properties. In this study, 6-chloro-3-methyluracil (Hcmu) was used as an unexplored building block for the self-assembly generation of a new bioactive copper(II) complex, [Cu(cmu)2(H2O)2]·4H2O (1). This compound was isolated as a stable crystalline solid and fully characterized in solution and solid state by a variety of spectroscopic methods (UV-vis, EPR, fluorescence spectroscopy), cyclic voltammetry, X-ray diffraction, and DFT calculations. The structural, topological, H-bonding, and Hirshfeld surface features of 1 were also analyzed in detail. The compound 1 shows a distorted octahedral {CuN2O4} coordination environment with two trans cmu- ligands adopting a bidentate N,O-coordination mode. The monocopper(II) molecular units participate in strong H-bonding interactions with water molecules of crystallization, leading to structural 0D → 3D extension into a 3D H-bonded network with a tfz-d topology. Molecular docking and ADME analysis as well as antibacterial and antioxidant activity studies were performed to assess the bioactivity of 1. In particular, this compound exhibits a prominent antibacterial effect against Gram negative (E. coli, P. aeruginosa) and positive (S. aureus, B. cereus) bacteria. The obtained copper(II) complex also represents the first structurally characterized coordination compound derived from 6-chloro-3-methyluracil, thus introducing this bioactive building block into a family of uracil metal complexes with notable biofunctional properties.
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Affiliation(s)
- Brajesh Kumar
- Department of Chemistry, National Institute of Technology Patna, Ashok Rajpath, Patna 800005, India.
| | - Tushar Das
- Department of Chemistry, National Institute of Technology Patna, Ashok Rajpath, Patna 800005, India.
| | - Subhadeep Das
- Department of Life Science and Biotechnology, Jadavpur University, 188 Raja S.C. Mallick Rd, Kolkata 700032, India
| | - Waldemar Maniukiewicz
- Institute of General and Ecological Chemistry, Lodz University of Technology, Żeromskiego 116, Łódź, Poland
| | - Dmytro S Nesterov
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal.
| | - Alexander M Kirillov
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal. .,Research Institute of Chemistry, Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya st., Moscow, 117198, Russian Federation
| | - Subrata Das
- Department of Chemistry, National Institute of Technology Patna, Ashok Rajpath, Patna 800005, India.
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Mokhtar N, Lee C, Hatton M, Mok W, Das T, Fisher P, Bates E, Mathew T. P05.04 Retrospective Study on the Correlation of Central Tumour and Central Structures and the Effect on Survival for Patients Receiving Lung SABR. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.276] [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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DUTTA P, Das T. POS-516 ASSESSMENT OF QUALITY OF LIFE IN HEMODIALYSIS PATIENTS USING WHOQOL-BREF QUESTIONNAIRE. Kidney Int Rep 2021. [DOI: 10.1016/j.ekir.2021.03.544] [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: 10/21/2022] Open
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Das T, Ranjan A, Sieroń L, Maniukiewicz W, Das S. Direct Synthesis, Characterization and Theoretical Studies of N‐(6‐Amino‐1,3‐dimethyl‐2,4‐dioxo‐1,2,3,4‐tetrahydropyrimidin‐5‐yl)benzamide Derivatives. ChemistrySelect 2021. [DOI: 10.1002/slct.202004745] [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: 11/06/2022]
Affiliation(s)
- Tushar Das
- Department of Chemistry National Institute of Technology Patna, Ashok Rajpath Patna 800005 India
- Department of Pharmacoinformatics National Institute of Pharmaceutical Education and Research Hajipur Vaishali Hajipur 844102 India
| | - Amit Ranjan
- Cancer & Translational Research Lab Dr. D.Y. Patil Biotechnology & Bioinformatics Institute Dr. D.Y. Patil Vidyapeeth Pune 411033 India
| | - Lesław Sieroń
- Institute of General and Ecological Chemistry Lodz University of Technology Żeromskiego 116 Łódź Poland
| | - Waldemar Maniukiewicz
- Institute of General and Ecological Chemistry Lodz University of Technology Żeromskiego 116 Łódź Poland
| | - Subrata Das
- Department of Chemistry National Institute of Technology Patna, Ashok Rajpath Patna 800005 India
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Dey A, Dempster K, MacKinley M, Jeon P, Das T, Khan A, Gati J, Palaniyappan L. Conceptual disorganization and redistribution of resting-state cortical hubs in untreated first-episode psychosis: A 7T study. NPJ Schizophr 2021; 7:4. [PMID: 33500416 PMCID: PMC7838254 DOI: 10.1038/s41537-020-00130-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 11/12/2020] [Indexed: 01/30/2023]
Abstract
Network-level dysconnectivity has been studied in positive and negative symptoms of schizophrenia. Conceptual disorganization (CD) is a symptom subtype that predicts impaired real-world functioning in psychosis. Systematic reviews have reported aberrant connectivity in formal thought disorder, a construct related to CD. However, no studies have investigated whole-brain functional correlates of CD in psychosis. We sought to investigate brain regions explaining the severity of CD in patients with first-episode psychosis (FEPs) compared with healthy controls (HCs). We computed whole-brain binarized degree centrality maps of 31 FEPs, 25 HCs, and characterized the patterns of network connectivity in the 2 groups. In FEPs, we related these findings to the severity of CD. We also studied the effect of positive and negative symptoms on altered network connectivity. Compared to HCs, reduced centrality of a right superior temporal gyrus (rSTG) cluster was observed in the FEPs. In patients exhibiting high CD, increased centrality of a medial superior parietal (mSPL) cluster was observed, compared to patients exhibiting low CD. This cluster was strongly correlated with CD scores but not with other symptom scores. Our observations are congruent with previous findings of reduced but not increased centrality. We observed increased centrality of mSPL suggesting that cortical reorganization occurs to provide alternate routes for information transfer. These findings provide insight into the underlying neural processes mediating the presentation of symptoms in untreated FEP. Longitudinal tracking of the symptom course will be useful to assess the mechanisms underlying these compensatory changes.
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Affiliation(s)
- Avyarthana Dey
- grid.39381.300000 0004 1936 8884Robarts Research Institute, London, ON Canada ,grid.39381.300000 0004 1936 8884Department of Psychiatry, University of Western Ontario, London, ON Canada
| | - Kara Dempster
- grid.39381.300000 0004 1936 8884Robarts Research Institute, London, ON Canada ,grid.39381.300000 0004 1936 8884Department of Psychiatry, University of Western Ontario, London, ON Canada ,grid.415847.b0000 0001 0556 2414Lawson Health Research Institute, London, ON Canada ,grid.55602.340000 0004 1936 8200Present Address: Department of Psychiatry, Dalhousie University, Halifax, NS Canada
| | - Michael MacKinley
- grid.39381.300000 0004 1936 8884Robarts Research Institute, London, ON Canada ,grid.39381.300000 0004 1936 8884Department of Psychiatry, University of Western Ontario, London, ON Canada ,grid.415847.b0000 0001 0556 2414Lawson Health Research Institute, London, ON Canada
| | - Peter Jeon
- grid.415847.b0000 0001 0556 2414Lawson Health Research Institute, London, ON Canada ,grid.39381.300000 0004 1936 8884Department of Medical Biophysics, University of Western Ontario, London, ON Canada
| | - Tushar Das
- grid.39381.300000 0004 1936 8884Robarts Research Institute, London, ON Canada ,grid.39381.300000 0004 1936 8884Department of Psychiatry, University of Western Ontario, London, ON Canada
| | - Ali Khan
- grid.39381.300000 0004 1936 8884Robarts Research Institute, London, ON Canada ,grid.39381.300000 0004 1936 8884Department of Medical Biophysics, University of Western Ontario, London, ON Canada ,grid.39381.300000 0004 1936 8884The Brain and Mind Institute, University of Western Ontario, London, ON Canada
| | - Joe Gati
- grid.39381.300000 0004 1936 8884Robarts Research Institute, London, ON Canada ,grid.39381.300000 0004 1936 8884Department of Medical Biophysics, University of Western Ontario, London, ON Canada
| | - Lena Palaniyappan
- grid.39381.300000 0004 1936 8884Robarts Research Institute, London, ON Canada ,grid.39381.300000 0004 1936 8884Department of Psychiatry, University of Western Ontario, London, ON Canada ,grid.415847.b0000 0001 0556 2414Lawson Health Research Institute, London, ON Canada ,grid.39381.300000 0004 1936 8884Department of Medical Biophysics, University of Western Ontario, London, ON Canada ,grid.39381.300000 0004 1936 8884The Brain and Mind Institute, University of Western Ontario, London, ON Canada
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Jalal M, Dutta A, Das T, Islam M. First detection of plasmid-mediated colistin-resistance gene (mcr-1, mcr-2 and mcr-3) in Escherichia coli isolated from breeder poultry of Bangladesh. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.082] [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: 11/28/2022] Open
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Rana E, Islam M, Das T, Dutta A, Ahad A, Biswas P, Barua H. Methicillin-resistant coagulase positive Staphylococcus aureus and Staphylococcus pseudintermedius circulating in dogs in Bangladesh. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.124] [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: 11/25/2022] Open
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Jadon R, Benson R, Das T, Barnett G. PD-0051: The impact of neuroradiology collaboration in head and neck cancer radiotherapy peer review. Radiother Oncol 2020. [DOI: 10.1016/s0167-8140(21)00077-3] [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: 11/30/2022]
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Miryahyaei S, Das T, Othman M, Batstone D, Eshtiaghi N. Anaerobic co-digestion of sewage sludge with cellulose, protein, and lipids: Role of rheology and digestibility. Sci Total Environ 2020; 731:139214. [PMID: 32417486 DOI: 10.1016/j.scitotenv.2020.139214] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 03/09/2020] [Revised: 04/24/2020] [Accepted: 05/02/2020] [Indexed: 06/11/2023]
Abstract
Rheology is known to have an impact on the performance of digesters, but the effect of additional substrates (co-digestion) is poorly understood. The main objective of this study was to investigate the effects of the addition of cellulose, protein and lipids to substrates on the rheological behaviour and biogas production of the mixture of primary sludge (PS) and waste-activated sludge (WAS) in a batch system. A mixture of PS and WAS to form the main substrate was anaerobically co-digested with different types of organic matter (cellulose, protein and lipids) as co-substrates at different co-substrate to main substrate ratios of 2-8 (wt%) under mesophilic conditions and below ammonia inhibition levels. Yield stress (τy) and the flow consistency index (k) of the combined feed in the case of cellulose and protein were significantly dependent on the amount of co-substrate added, while there was an insignificant impact on these properties when lipids were added. Cellulose significantly increased τy and k in the feed, which resulted in poor fluidity and the improper homogenisation of the digester content, and consequently decreased the biogas yield. In contrast, the biogas yield was improved through the addition of 2% to 6% protein despite an increase in τy and k of the feed, but the methane yield decreased at 7% and 8% levels of protein concentration. This observation indicates that the threshold for τy and k of the digester media depends on the organic nature and digestibility of the substrate. There was no significant impact on the flow properties of the initial mixture when lipids were added, and their addition increased the biogas yield. A first-order kinetic reaction model was used for predicting the yield of methane from these digesters. The rate constant values revealed an increasing trend, with the highest for protein then lipids then cellulose.
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Affiliation(s)
- S Miryahyaei
- Chemical and Environmental Engineering, School of Engineering, RMIT University, 3001 Melbourne, Australia
| | - T Das
- Chemical and Environmental Engineering, School of Engineering, RMIT University, 3001 Melbourne, Australia
| | - M Othman
- Chemical and Environmental Engineering, School of Engineering, RMIT University, 3001 Melbourne, Australia
| | - D Batstone
- Advanced Water Management Centre, The University of Queensland, Brisbane, Australia
| | - N Eshtiaghi
- Chemical and Environmental Engineering, School of Engineering, RMIT University, 3001 Melbourne, Australia.
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Limongi R, Jeon P, Mackinley M, Das T, Dempster K, Théberge J, Bartha R, Wong D, Palaniyappan L. Glutamate and Dysconnection in the Salience Network: Neurochemical, Effective Connectivity, and Computational Evidence in Schizophrenia. Biol Psychiatry 2020; 88:273-281. [PMID: 32312577 DOI: 10.1016/j.biopsych.2020.01.021] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 01/06/2020] [Accepted: 01/27/2020] [Indexed: 11/17/2022]
Abstract
BACKGROUND Functional dysconnection in schizophrenia is underwritten by a pathophysiology of the glutamate neurotransmission that affects the excitation-inhibition balance in key nodes of the salience network. Physiologically, this manifests as aberrant effective connectivity in intrinsic connections involving inhibitory interneurons. In computational terms, this produces a pathology of evidence accumulation and ensuing inference in the brain. Finally, the pathophysiology and aberrant inference would partially account for the psychopathology of schizophrenia as measured in terms of symptoms and signs. We refer to this formulation as the 3-level hypothesis. METHODS We tested the hypothesis in core nodes of the salience network (the dorsal anterior cingulate cortex [dACC] and the anterior insula) of 20 patients with first-episode psychosis and 20 healthy control subjects. We established 3-way correlations between the magnetic resonance spectroscopy measures of glutamate, effective connectivity of resting-state functional magnetic resonance imaging, and correlations between measures of this connectivity and estimates of precision (inherent in evidence accumulation in the Stroop task) and psychopathology. RESULTS Glutamate concentration in the dACC was associated with higher and lower inhibitory connectivity in the dACC and in the anterior insula, respectively. Crucially, glutamate concentration correlated negatively with the inhibitory influence on the excitatory neuronal population in the dACC of subjects with first-episode psychosis. Furthermore, aberrant computational parameters of the Stroop task performance were associated with aberrant inhibitory connections. Finally, the strength of connections from the dACC to the anterior insula correlated negatively with severity of social withdrawal. CONCLUSIONS These findings support a link between glutamate-mediated cortical disinhibition, effective-connectivity deficits, and computational performance in psychosis.
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Affiliation(s)
- Roberto Limongi
- Department of Psychiatry, Western University, London, Ontario, Canada; Robarts Research Institute, Western University, London, Ontario, Canada.
| | - Peter Jeon
- Department of Medical Biophysics, Western University, London, Ontario, Canada
| | - Michael Mackinley
- Department of Psychiatry, Western University, London, Ontario, Canada; Robarts Research Institute, Western University, London, Ontario, Canada
| | - Tushar Das
- Department of Strategic Enterprise Solutions, Fanshawe College, London, Ontario, Canada
| | - Kara Dempster
- Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Jean Théberge
- Department of Psychiatry, Western University, London, Ontario, Canada; Department of Medical Biophysics, Western University, London, Ontario, Canada; Department of Medical Imaging, Western University, London, Ontario, Canada; Neuropsychiatry Imaging Lab, Lawson Health Research Institute, London, Ontario, Canada; Department of Diagnostic Imaging, St. Joseph's Health Care London, London, Ontario, Canada
| | - Robert Bartha
- Department of Medical Biophysics, Western University, London, Ontario, Canada
| | - Dickson Wong
- Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Lena Palaniyappan
- Department of Psychiatry, Western University, London, Ontario, Canada; Robarts Research Institute, Western University, London, Ontario, Canada; Lawson Health Research Institute, London, Ontario, Canada.
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Sivaprasad S, Raman R, Conroy D, Mohan, Wittenberg R, Rajalakshmi R, Majeed A, Krishnakumar S, Prevost T, Parameswaran S, Turowski P, Maheswari U, Khobragade R, Netuveli G, Sadanandan R, Greenwood J, Ramasamy K, Rao M, Bergeles C, Das T. The ORNATE India Project: United Kingdom-India Research Collaboration to tackle visual impairment due to diabetic retinopathy. Eye (Lond) 2020; 34:1279-1286. [PMID: 32398841 DOI: 10.1038/s41433-020-0854-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/15/2020] [Accepted: 03/17/2020] [Indexed: 01/02/2023] Open
Abstract
INTRODUCTION The ORNATE India project is funded by the UK Research and Innovation (UKRI) through the Global Challenges Research Fund. The aim is to build research capacity and capability in India and the UK to tackle global burden of diabetes-related visual impairment. As there are over 77 million people with diabetes in India, it is challenging to screen every person with diabetes annually for sight-threatening diabetic retinopathy (DR). Therefore, alternate safe approaches need to be developed so that those at-risk of visual impairment due to DR is identified promptly and treated. METHODS The project team utilised diverse global health strategies and research methods to co-design work packages to build research capacity and capability to ensure effective, affordable and efficient DR services are made available for the population. The strategies and methods employed included health system strengthening; implementation science; establishing care pathways; co-designing collaborative studies on affordable technologies, developing quality standards and guidelines to decrease variations in care; economic analysis; risk modelling and stratification. Five integrated work packages have been developed to deal with all aspects of DR care. These included implementation of a DR screening programme in the public health system in a district in Kerala, evaluating regional prevalence of diabetes and DR and assessing ideal tests for holistic screening for diabetes and its complications in 20 areas in India, utilising artificial intelligence on retinal images to facilitate DR screening, exploring biomarker and biosensor research to detect people at risk of diabetes complications, estimating cost of blindness in India and risk modelling to develop risk-based screening models for diabetes and its complications. A large collaborative network will be formed to propagate research, promote shared learning and bilateral exchanges between high- and middle-income countries to tackle diabetes-related blindness.
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Affiliation(s)
- S Sivaprasad
- NIHR Biomedical Research Centre, Moorfields Eye Hospital NHS Foundation Trust, London, UK.
| | - R Raman
- Vision Research Foundation, Sankara Nethralaya, Chennai, India
| | - D Conroy
- UCL Institute of Ophthalmology, London, UK
| | - Mohan
- Madras Diabetes Research Foundation, Chennai, India
| | | | | | - A Majeed
- Imperial College London, London, UK
| | - S Krishnakumar
- Vision Research Foundation, Sankara Nethralaya, Chennai, India
| | | | - S Parameswaran
- Vision Research Foundation, Sankara Nethralaya, Chennai, India
| | - P Turowski
- UCL Institute of Ophthalmology, London, UK
| | | | | | | | | | | | - K Ramasamy
- Aravind Medical Research Foundation, Madurai, India
| | - M Rao
- Imperial College London, London, UK
| | | | - T Das
- Hyderabad Eye Research Foundation, L V Prasad Eye Institute, Hyderabad, India
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15
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Ghosh S, Das T. Cognitive Dysfunction in Elderly Diabetics: A Preliminary Study. J Assoc Physicians India 2020; 68:104. [PMID: 31979962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- S Ghosh
- KPC medical college and hospital,jadavpur
| | - T Das
- KPC medical college and hospital,jadavpur
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16
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Ryan A, Bates E, Danson S, Das T, Fisher P, Hatton M, Lee C, Young R, Taylor F, Marshall R. Outcomes of patients in South Yorkshire with advanced non-small-cell lung cancer treated with second-line atezolizumab following induction with chemotherapy. Lung Cancer 2020. [DOI: 10.1016/s0169-5002(20)30153-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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John JK, Das T, Sethi M, Kattoor J, Tomar N, Saikumar G. Epidemiological study of porcine teschovirus infection in pigs at Bareilly, Uttar Pradesh, India. BIOL RHYTHM RES 2019. [DOI: 10.1080/09291016.2019.1627645] [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: 10/25/2022]
Affiliation(s)
- J. K. John
- Swine Disease Laboratory, Division of Pathology, ICAR- Indian Veterinary Research Institute, Bareilly, India
| | - T. Das
- Swine Disease Laboratory, Division of Pathology, ICAR- Indian Veterinary Research Institute, Bareilly, India
| | - M. Sethi
- Swine Disease Laboratory, Division of Pathology, ICAR- Indian Veterinary Research Institute, Bareilly, India
| | - J.J. Kattoor
- Swine Disease Laboratory, Division of Pathology, ICAR- Indian Veterinary Research Institute, Bareilly, India
| | - N. Tomar
- Swine Disease Laboratory, Division of Pathology, ICAR- Indian Veterinary Research Institute, Bareilly, India
| | - G. Saikumar
- Swine Disease Laboratory, Division of Pathology, ICAR- Indian Veterinary Research Institute, Bareilly, India
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18
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Dutta A, Sengupta D, Paul S, Chakraborty S, Mukherjee S, Das T. A new insight into tumour immune-evasion: Crosstalk between cancer stem cells and T regulatory cells. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz438.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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19
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Kumari S, Saikumar G, Desingu PA, Das T, Singh R. Immunohistochemical detection of naturally occurring porcine Sapelovirus infection in Indian pigs. J Immunoassay Immunochem 2019; 40:676-684. [PMID: 31603022 DOI: 10.1080/15321819.2019.1675695] [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] [Indexed: 01/11/2023]
Abstract
We investigated immunohistochemical detection of porcine Sapelovirus (PSV) in naturally infected pigs of different ages. Forty-nine fecal samples, intestinal contents and other tissue samples from dead pigs were screened in previous study using reverse transcription polymerase chain reaction (RT-PCR) for PSV infection. Eight animals were positive for PSV based on RT-PCR examination. Gross lesions were recorded mainly in the large and small intestines. Microscopic examination of intestines showed severe enteritis. Tissue sections of all organs from PSV positive animals were immunostained using hyperimmune serum raised in rats against PSV that had been grown in a BHK-21 cell line. Staining of PSV was found only in the large and small intestines.
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Affiliation(s)
- Swati Kumari
- Division of Pathology, Indian Council of Agricultural Research-Indian Veterinary Research Institute, Bareilly, India
| | - G Saikumar
- Division of Pathology, Indian Council of Agricultural Research-Indian Veterinary Research Institute, Bareilly, India
| | - P A Desingu
- Division of Pathology, Indian Council of Agricultural Research-Indian Veterinary Research Institute, Bareilly, India
| | - T Das
- Division of Pathology, Indian Council of Agricultural Research-Indian Veterinary Research Institute, Bareilly, India
| | - Rahul Singh
- Division of Pathology, Indian Council of Agricultural Research-Indian Veterinary Research Institute, Bareilly, India
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20
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Palaniyappan L, Al-Radaideh A, Mougin O, Das T, Gowland P, Liddle PF. Aberrant myelination of the cingulum and Schneiderian delusions in schizophrenia: a 7T magnetization transfer study. Psychol Med 2019; 49:1890-1896. [PMID: 30229713 DOI: 10.1017/s0033291718002647] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND The structural integrity of the anterior cingulum has been repeatedly observed to be abnormal in patients with schizophrenia. More recently, aberrant myelination of frontal fasciculi, especially, cingulum has been proposed to underlie delayed corollary discharges that can affect sense of agency and contribute to delusions of control (Schneiderian delusions). Using the magnetization transfer phenomenon at an ultra-high field 7T MRI, we investigated the putative myelin content of cingulum bundle in patients with schizophrenia. METHODS Seventeen clinically stable patients with schizophrenia and 20 controls were recruited for this 7T MRI study. We used a region-of-interest method and extracted magnetization transfer ratio (MTR) from left and right dorsal cingulum bundles and estimated patients v. controls differences. We also related the cingulum MTR values to the severity of Schneiderian delusions. RESULTS Patients had a significant reduction in the MTR, indicating reduced myelin content, in the cingulum bundle (right cingulum Hedges' g = 0.91; left cingulum g = 0.03). The reduced MTR of left cingulum was associated with higher severity of Schneiderian delusions (τ = -0.45, p = 0.026) but no such relationship was seen for the right cingulum MTR (τ = -0.136, p = 0.50) among patients. The association between the left cingulum MTR and Schneiderian delusions was not explained by the presence of other delusions, hallucinations, disorganization or negative symptoms. CONCLUSIONS Dysmyelination of the cingulum bundle is seen in a subgroup of patients with schizophrenia and may be involved in the mechanism of Schneiderian delusions.
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Affiliation(s)
- Lena Palaniyappan
- Robarts Research Institute, University of Western Ontario,London, Ontario,Canada
| | - Ali Al-Radaideh
- Department of Medical Imaging, Faculty of Allied Health Sciences,The Hashemite University,Zarqa,Jordan
| | - Olivier Mougin
- Sir Peter Mansfield Imaging Centre (SPMIC), School of Physics and Astronomy, University of Nottingham,Nottingham,UK
| | - Tushar Das
- Robarts Research Institute, University of Western Ontario,London, Ontario,Canada
| | - Penny Gowland
- Sir Peter Mansfield Imaging Centre (SPMIC), School of Physics and Astronomy, University of Nottingham,Nottingham,UK
| | - Peter F Liddle
- Translational Neuroimaging for Mental Health, Division of Psychiatry and Applied Psychology,University of Nottingham,Nottingham,UK
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21
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Miryahyaei S, Olinga K, Abdul Muthalib FA, Das T, Ab Aziz MS, Othman M, Baudez JC, Batstone D, Eshtiaghi N. Impact of rheological properties of substrate on anaerobic digestion and digestate dewaterability: New insights through rheological and physico-chemical interaction. Water Res 2019; 150:56-67. [PMID: 30508714 DOI: 10.1016/j.watres.2018.11.049] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [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: 10/09/2018] [Revised: 11/17/2018] [Accepted: 11/17/2018] [Indexed: 06/09/2023]
Abstract
Mesophilic batch anaerobic digesters fed by different substrates were set up to identify the role of substrate rheology in anaerobic digestion performance while operating below the toxic level. Five substrates of different rheological behaviour but at the same amount of organic matters were prepared by addition of different amount of an inert material (0, 0.03, 0.07, 0.11, and 0.20 g) per g of waste activated sludge (WAS). To gain a comprehensive insight, the interactive relationship between substrate rheology, physico-chemical properties and biogas production as well as digestate dewaterability was investigated. The results proved that better access of microorganisms to organic matters improved the digester performance and led to 19.29% and 12.5% increase in biogas yield and VS removal efficiency, respectively. Moreover, the statistical analysis showed that consistency index and loss modulus of sludge could be employed as promising indications for biogas yield while yield stress could predict dewaterability of digestate as far as the other physico-chemical properties remained unchanged. During digestion measurement of consistency index and loss modulus of digestate could be performed as a reliable tool to monitor biogas production.
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Affiliation(s)
- S Miryahyaei
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Australia
| | - K Olinga
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Australia
| | - F A Abdul Muthalib
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Australia
| | - T Das
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Australia
| | - M S Ab Aziz
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Australia
| | - M Othman
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Australia
| | - J C Baudez
- Luxembourg Institute of Science and Technology, Environmental Research and Innovation Department, Belvaux, Luxembourg
| | - D Batstone
- Advanced Water Management Centre, The University of Queensland, Brisbane, Australia
| | - N Eshtiaghi
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Australia.
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22
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Sonwani R, Giri B, Das T, Singh R, Rai B. Biodegradation of fluorene by neoteric LDPE immobilized Pseudomonas pseudoalcaligenes NRSS3 in a packed bed bioreactor and analysis of external mass transfer correlation. Process Biochem 2019. [DOI: 10.1016/j.procbio.2018.11.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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23
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Elmushraf R, Clinch H, Salawu A, Fisher P, Young R, Lee C, Danson S, Bates E, Hatton M, Low L, Das T, Taylor F. The North Trent experience of the use of first line pembrolizumab in stage IIIB/IV non-small cell lung cancer. Lung Cancer 2019. [DOI: 10.1016/s0169-5002(19)30145-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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24
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Das T, Bartschat K, Bray I, Fursa D, Zatsarinny O, Ballance C, Chung HK, Ralchenko Y. Recommended electron-impact excitation and ionization cross sections for Be I. At Data Nucl Data Tables 2019; 127-128:10.1016/j.adt.2018.11.001. [PMID: 32116394 PMCID: PMC7047829 DOI: 10.1016/j.adt.2018.11.001] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Analytic fits to the recommended electron-impact excitation and ionization cross sections for Be I are presented. The lowest 19 terms of configurations 2snl (n ≤ 4) and 2p 2 terms below the first ionization limit are considered. The fits are based on the accurate calculations with the convergent close coupling (CCC) method as well as the B-spline R-matrix (BSR) approach. The fitted cross sections provide rate coefficients that are believed to approximate the original data within 10% with very few exceptions. The oscillator strengths for the dipole-allowed transitions between all the considered states are calculated with the relativistic multi-configuration Dirac-Hartree-Fock (MCDHF) approach and compared with the CCC and BSR results. This comparison shows a very good agreement except for a handful of cases with likely strong cancellations.
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Affiliation(s)
- T. Das
- International Atomic Energy Agency, A-1400 Vienna,
Austria
| | - K. Bartschat
- Department of Physics and Astronomy, Drake University, Des
Moines, IA 50311, USA
| | - I. Bray
- Curtin Institute for Computation and Department of Physics,
Astronomy and Medical Radiation Science,Curtin University, GPO Box U1987, Perth, WA
6845, Australia
| | - D.V. Fursa
- Curtin Institute for Computation and Department of Physics,
Astronomy and Medical Radiation Science,Curtin University, GPO Box U1987, Perth, WA
6845, Australia
| | - O. Zatsarinny
- Department of Physics and Astronomy, Drake University, Des
Moines, IA 50311, USA
| | - C. Ballance
- School of Mathematics and Physics, Queen’s
University Belfast, Belfast BT7 1NN, Northern Ireland, United Kingdom
| | - H.-K. Chung
- International Atomic Energy Agency, A-1400 Vienna,
Austria
| | - Yu. Ralchenko
- National Institute of Standards and Technology,
Gaithersburg, MD 20899, USA
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25
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Li M, Deng W, Das T, Li Y, Zhao L, Ma X, Wang Y, Yu H, Li X, Meng YJ, Wang Q, Palaniyappan L, Li T. Neural substrate of unrelenting negative symptoms in schizophrenia: a longitudinal resting-state fMRI study. Eur Arch Psychiatry Clin Neurosci 2018; 268:641-651. [PMID: 29128871 DOI: 10.1007/s00406-017-0851-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 11/02/2017] [Indexed: 02/05/2023]
Abstract
Developing a mechanistic insight into the specific brain processes that underpin improvement in negative symptoms can help us design novel chemical and physical treatments against these unrelenting symptoms. The aim of the present study is to explore the longitudinal changes in the brain's regional functional efficiency that accompany improvement in negative symptoms seen in first-episode patients with schizophrenia when treated with antipsychotic for 1 year. Forty-seven first-episode patients with schizophrenia were scanned at a drug-naive baseline state and followed up for 1 year to identify negative symptom responders (Rn) and non-responders (NRn). Fractional amplitude of low-frequency fluctuations (fALFF) and Granger analysis of effective connectivity (EC) were used to examine the different patterns of regional function and connectivity between Rn and NRn during the 1 year follow-up. Increase of fALFF in the left superior temporal gyrus (STG) and increase of EC from the left STG to the dorsolateral prefrontal cortex (DLPFC) was found in Rn compared to NRn. We further validated that the identified changes in fALFF/EC of STG occur specifically in relation to negative symptoms only (i.e., not pseudo-specific in relation to positive, extrapyramidal or depressive symptoms), and occur irrespective of arbitrary clinical categorization of treatment response. An increase in fALFF in the precuneus and the inferior parietal lobule, and a decrease in EC from the left STG to the occipital cortex, were also found at the 1 year follow-up irrespective of improvement in negative symptoms. Interventions that improve the functional efficiency of left STG and its prefrontal connectivity may show efficacy in alleviating negative symptoms in first-episode schizophrenia.
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Affiliation(s)
- Mingli Li
- Mental Health Center and Psychiatric Laboratory, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China.,West China Brain Research Center, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Wei Deng
- Mental Health Center and Psychiatric Laboratory, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China.,West China Brain Research Center, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Tushar Das
- Robarts Research Institute and The Brain and Mind Institute, University of Western Ontario, London, ON, Canada.,Department of Psychiatry, University of Western Ontario, London, ON, Canada.,Lawson Health Research Institute, London, ON, Canada
| | - Yinfei Li
- Mental Health Center and Psychiatric Laboratory, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China.,West China Brain Research Center, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Liansheng Zhao
- Mental Health Center and Psychiatric Laboratory, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China.,West China Brain Research Center, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Xiaohong Ma
- Mental Health Center and Psychiatric Laboratory, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China.,West China Brain Research Center, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Yingcheng Wang
- Mental Health Center and Psychiatric Laboratory, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China.,West China Brain Research Center, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Hua Yu
- Mental Health Center and Psychiatric Laboratory, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China.,West China Brain Research Center, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Xiaojing Li
- Mental Health Center and Psychiatric Laboratory, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China.,West China Brain Research Center, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Ya-Jing Meng
- Mental Health Center and Psychiatric Laboratory, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China.,West China Brain Research Center, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Qiang Wang
- Mental Health Center and Psychiatric Laboratory, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China.,West China Brain Research Center, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Lena Palaniyappan
- Robarts Research Institute and The Brain and Mind Institute, University of Western Ontario, London, ON, Canada. .,Department of Psychiatry, University of Western Ontario, London, ON, Canada. .,Lawson Health Research Institute, London, ON, Canada. .,Prevention and Early Intervention Program for Psychoses (PEPP), A2-636, LHSC-VH, 800 Commissioners Road, London, ON, N6A 5W9, Canada.
| | - Tao Li
- Mental Health Center and Psychiatric Laboratory, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China. .,West China Brain Research Center, West China Hospital, Sichuan University, Chengdu, People's Republic of China.
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26
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Robinson S, Tahir B, Absalom K, Tripathi D, Fisher P, Das T, Lee C, Bates E, Hatton M. P1.17-05 Accelerated Radiotherapy for Non-Small Cell Lung Cancer: A 12 Year Retrospective Review of Two Dose Fractionation Schedules. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1038] [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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27
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Das T, Alabi I, Colley M, Yan F, Griffith W, Bach S, Weintraub ST, Renthal R. Major venom proteins of the fire ant Solenopsis invicta: insights into possible pheromone-binding function from mass spectrometric analysis. Insect Mol Biol 2018; 27:505-511. [PMID: 29656567 PMCID: PMC6188847 DOI: 10.1111/imb.12388] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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] [Indexed: 05/11/2023]
Abstract
Proteins in the venom of the fire ant Solenopsis invicta have been suggested to function in pheromone binding. Venom from queens and workers contains different isoforms of these proteins, consistent with the differing pheromones they secrete, but questions remain about the venom protein composition and glandular source. We found that the queen venom contains a previously uncharacterized pheromone-binding protein paralogue known as Sol i 2X1. Using imaging mass spectrometry, we located the main venom proteins in the poison sac, implying that pheromones might have to compete with venom alkaloids for binding. Using the known structure of the worker venom protein Sol i 2w, we generated three-dimensional homology models of the worker venom protein Sol i 4.02, and of the two main venom proteins in queens and female alates, Sol i 2q and Sol i 2X1. Surprisingly, the models show that the proteins have relatively small internal hydrophobic binding pockets that are blocked by about 10 amino acids of the C-terminal region. For these proteins to function as carriers of hydrophobic ligands, a conformational change would be required to displace the C-terminal region, somewhat like the mechanism known to occur in the silk moth pheromone-binding protein.
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Affiliation(s)
- T Das
- Department of Biology, University of Texas at San Antonio, San Antonio, TX, USA
| | - I Alabi
- Department of Biology, University of Texas at San Antonio, San Antonio, TX, USA
| | - M Colley
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX, USA
| | - F Yan
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX, USA
| | - W Griffith
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX, USA
| | - S Bach
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX, USA
| | - S T Weintraub
- Department of Biochemistry and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - R Renthal
- Department of Biology, University of Texas at San Antonio, San Antonio, TX, USA
- Department of Biochemistry and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
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28
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Das T, Borgwardt S, Hauke DJ, Harrisberger F, Lang UE, Riecher-Rössler A, Palaniyappan L, Schmidt A. Disorganized Gyrification Network Properties During the Transition to Psychosis. JAMA Psychiatry 2018; 75:613-622. [PMID: 29710118 PMCID: PMC6137528 DOI: 10.1001/jamapsychiatry.2018.0391] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
IMPORTANCE There is urgent need to improve the limited prognostic accuracy of clinical instruments to predict psychosis onset in individuals at clinical high risk (CHR) for psychosis. As yet, no reliable biological marker has been established to delineate CHR individuals who will develop psychosis from those who will not. OBJECTIVES To investigate abnormalities in a graph-based gyrification connectome in the early stages of psychosis and to test the accuracy of this systems-based approach to predict a transition to psychosis among CHR individuals. DESIGN, SETTING, AND PARTICIPANTS This investigation was a cross-sectional magnetic resonance imaging (MRI) study with follow-up assessment to determine the transition status of CHR individuals. Participants were recruited from a specialized clinic for the early detection of psychosis at the Department of Psychiatry (Universitäre Psychiatrische Kliniken [UPK]), University of Basel, Basel, Switzerland. Participants included individuals in the following 4 study groups: 44 healthy controls (HC group), 63 at-risk mental state (ARMS) individuals without later transition to psychosis (ARMS-NT group), 16 ARMS individuals with later transition to psychosis (ARMS-T group), and 38 antipsychotic-free patients with first-episode psychosis (FEP group). The study dates were November 2008 to November 2014. The dates of analysis were March to November 2017. MAIN OUTCOMES AND MEASURES Gyrification-based structural covariance networks (connectomes) were constructed to quantify global integration, segregation, and small-worldness. Group differences in network measures were assessed using functional data analysis across a range of network densities. The extremely randomized trees algorithm with repeated 5-fold cross-validation was used to delineate ARMS-T individuals from ARMS-NT individuals. Permutation tests were conducted to assess the significance of classification performance measures. RESULTS The 4 study groups comprised 161 participants with mean (SD) ages ranging from 24.0 (4.7) to 25.9 (5.7) years. Small-worldness was reduced in the ARMS-T and FEP groups and was associated with decreased integration and increased segregation in both groups (Hedges g range, 0.666-1.050). Using the connectome properties as features, a good classification performance was obtained (accuracy, 90.49%; balanced accuracy, 81.34%; positive predictive value, 84.47%; negative predictive value, 92.18%; sensitivity, 66.11%; specificity, 96.58%; and area under the curve, 88.30%). CONCLUSIONS AND RELEVANCE These findings suggest that there is poor integration in the coordinated development of cortical folding in patients who develop psychosis. These results further suggest that gyrification-based connectomes might be a promising means to generate systems-based measures from anatomical data to improve individual prediction of a transition to psychosis in CHR individuals.
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Affiliation(s)
- Tushar Das
- Robarts Research Institute, University of Western Ontario, London, Ontario, Canada,Department of Psychiatry, University of Western Ontario, London, Ontario, Canada,Lawson Health Research Institute, London, Ontario, Canada
| | - Stefan Borgwardt
- Department of Psychiatry (Universitäre Psychiatrische Kliniken [UPK]), University of Basel, Basel, Switzerland
| | - Daniel J. Hauke
- Department of Psychiatry (Universitäre Psychiatrische Kliniken [UPK]), University of Basel, Basel, Switzerland
| | - Fabienne Harrisberger
- Department of Psychiatry (Universitäre Psychiatrische Kliniken [UPK]), University of Basel, Basel, Switzerland
| | - Undine E. Lang
- Department of Psychiatry (Universitäre Psychiatrische Kliniken [UPK]), University of Basel, Basel, Switzerland
| | - Anita Riecher-Rössler
- Department of Psychiatry (Universitäre Psychiatrische Kliniken [UPK]), University of Basel, Basel, Switzerland
| | - Lena Palaniyappan
- Robarts Research Institute, University of Western Ontario, London, Ontario, Canada,Department of Psychiatry, University of Western Ontario, London, Ontario, Canada,Lawson Health Research Institute, London, Ontario, Canada,Department of Medical Biophysics, University of Western Ontario, London, Ontario, Canada
| | - André Schmidt
- Department of Psychiatry (Universitäre Psychiatrische Kliniken [UPK]), University of Basel, Basel, Switzerland
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29
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Green JL, Harwood AE, Smith GE, Das T, Raza A, Cayton T, Wallace T, Carradice D, Chetter IC. Extracorporeal shockwave therapy for intermittent claudication: Medium-term outcomes from a double-blind randomised placebo-controlled pilot trial. Vascular 2018; 26:531-539. [PMID: 29722640 DOI: 10.1177/1708538118773618] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 11/15/2022]
Abstract
Objectives Peripheral arterial disease most commonly presents as intermittent claudication (IC). Early evidence has suggested that extracorporeal shockwave therapy is efficacious in the short term for the management of intermittent claudication. The objective of this pilot trial was to evaluate the medium-term efficacy of this treatment. Methods This double-blind randomised placebo-controlled pilot trial randomised patients with unilateral intermittent claudication in a 1:1 fashion to receive extracorporeal shockwave therapy or a sham treatment for three sessions per week over three weeks. Primary outcomes were maximum walking distance and intermittent claudication distance using a fixed-load treadmill test. Secondary outcomes included pre- and post-exertional ankle-brachial pressure indices, safety and quality of life assessed using generic (SF36, EQ-5D-3L) and disease-specific (vascular quality of life) measures. All outcome measures were assessed at 12 months post-treatment. Results Thirty participants were included in the study (extracorporeal shockwave therapy, n = 15; sham, n = 15), with 26 followed up and analysed at 12 months (extracorporeal shockwave therapy, n = 13; sham, n = 13). Intragroup analysis demonstrated significant improvements in maximum walking distance, intermittent claudication distance and post-exertional ankle-brachial pressure indices ( p < 0.05) in the active treatment group, with no improvements in pre-exertional ankle-brachial pressure indices. Significant improvements in quality of life were observed in 3 out of 19 domains assessed in the active group. A re-intervention rate of 26.7% was seen in both groups. Conclusions These findings suggest that extracorporeal shockwave therapy is effective in improving walking distances at 12 months. Although this study provides important pilot data, a larger study is needed to corroborate these findings and to investigate the actions of this treatment. ISRCTN NCT02652078.
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Affiliation(s)
- Jordan Luke Green
- Academic Vascular Surgical Unit, Hull York Medical School/University of Hull, Hull, UK
| | - Amy Elizabeth Harwood
- Academic Vascular Surgical Unit, Hull York Medical School/University of Hull, Hull, UK
| | - George Edward Smith
- Academic Vascular Surgical Unit, Hull York Medical School/University of Hull, Hull, UK
| | - Tushar Das
- Academic Vascular Surgical Unit, Hull York Medical School/University of Hull, Hull, UK
| | - Ali Raza
- Academic Vascular Surgical Unit, Hull York Medical School/University of Hull, Hull, UK
| | - Thomas Cayton
- Academic Vascular Surgical Unit, Hull York Medical School/University of Hull, Hull, UK
| | - Tom Wallace
- Academic Vascular Surgical Unit, Hull York Medical School/University of Hull, Hull, UK
| | - Daniel Carradice
- Academic Vascular Surgical Unit, Hull York Medical School/University of Hull, Hull, UK
| | - Ian Clifford Chetter
- Academic Vascular Surgical Unit, Hull York Medical School/University of Hull, Hull, UK
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Hatton M, Robinson S, Bradshaw J, Riley S, Das T, Lee C, Fisher P, Bates E, Tozer-Loft S, Tahir B. 111O Impact of cardiac doses on survival of non-small cell lung cancer (NSCLC) patients following radical accelerated radiotherapy. J Thorac Oncol 2018. [DOI: 10.1016/s1556-0864(18)30385-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sanganalmath P, Lester JE, Bradshaw AG, Das T, Esler C, Roy AEF, Toy E, Lester JF, Button M, Wilson P, Comins C, Atherton P, Pickles R, Foweraker K, Walker GA, Keni M, Hatton MQ. Continuous Hyperfractionated Accelerated Radiotherapy (CHART) for Non-small Cell Lung Cancer (NSCLC): 7 Years' Experience From Nine UK Centres. Clin Oncol (R Coll Radiol) 2018; 30:144-150. [PMID: 29336865 DOI: 10.1016/j.clon.2017.12.019] [Citation(s) in RCA: 7] [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: 08/14/2017] [Revised: 08/27/2017] [Accepted: 11/06/2017] [Indexed: 01/15/2023]
Abstract
AIM Continuous hyperfractionated accelerated radiotherapy (CHART) remains an option to treat non-small cell lung cancer (NSCLC; NICE, 2011). We have previously published treatment outcomes from 1998-2003 across five UK centres. Here we update the UK CHART experience, reporting outcomes and toxicities for patients treated between 2003 and 2009. MATERIALS AND METHODS UK CHART centres were invited to participate in a retrospective data analysis of NSCLC patients treated with CHART from 2003 to 2009. Nine (of 14) centres were able to submit their data into a standard database. The Kaplan-Meier method estimated survival and the Log-rank test analysed the significance. RESULTS In total, 849 patients had CHART treatment, with a median age of 71 years (range 31-91), 534 (63%) were men, 55% had undergone positron emission tomography-computed tomography (PET-CT) and 26% had prior chemotherapy; 839 (99%) patients received all the prescribed treatment. The median overall survival was 22 months with 2 and 3 year survival of 47% and 32%, respectively. Statistically significant differences in survival were noted for stage IA versus IB (33.2 months versus 25 months; P = 0.032) and IIIA versus IIIB (20 months versus 16 months; P = 0.018). Response at 3 months and outcomes were significantly linked; complete response showing survival of 34 months against 19 months, 15 months and 8 months for partial response, stable and progressive disease, respectively (P < 0.001). Age, gender, performance status, prior chemotherapy and PET-CT did not affect the survival outcomes. Treatment was well tolerated with <5% reporting ≥grade 3 toxicity. CONCLUSION In routine practice, CHART results for NSCLC remain encouraging and we have been able to show an improvement in survival compared with the original trial cohort. We have confirmed that CHART remains deliverable with low toxicity rates and we are taking a dose-escalated CHART regimen forward in a randomised phase II study of sequential chemoradiotherapy against other accelerated dose-escalated schedules.
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Affiliation(s)
| | | | - A G Bradshaw
- Weston Park Hospital, Sheffield, UK; Newcastle on Tyne Hospitals NHS Trust, Freeman Hospital, Newcastle, UK
| | - T Das
- Weston Park Hospital, Sheffield, UK
| | - C Esler
- University Hospitals of Leicester NHS Trust, Leicester, UK
| | - A E F Roy
- Plymouth Hospitals NHS Trust, Plymouth, UK
| | - E Toy
- Royal Devon and Exeter NHS Foundation Trust, Exeter, UK
| | | | - M Button
- Velindre Cancer Centre, Cardiff, UK
| | - P Wilson
- University Hospitals Bristol NHS Trust, Bristol, UK
| | - C Comins
- University Hospitals Bristol NHS Trust, Bristol, UK
| | - P Atherton
- Newcastle on Tyne Hospitals NHS Trust, Freeman Hospital, Newcastle, UK
| | - R Pickles
- Newcastle on Tyne Hospitals NHS Trust, Freeman Hospital, Newcastle, UK
| | - K Foweraker
- Nottingham University Hospitals NHS Trust, City Hospital, Nottingham, UK
| | - G A Walker
- Derby Hospitals NHS Trust, Royal Derby Hospital, UK
| | - M Keni
- Derby Hospitals NHS Trust, Royal Derby Hospital, UK
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Kumar D, Das T, Giri BS, Verma B. Characterization and compositional analysis of highly acidic karanja oil and its potential feedstock for enzymatic synthesis of biodiesel. NEW J CHEM 2018. [DOI: 10.1039/c8nj03084g] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the present study, we focused on the synthesis of biodiesel fromPseudomonas cepacia, crude karanja oil by the process of enzymatic transesterification using bio-support materials, such as lipase immobilized on polyvinyl alcohol/AlgNa.
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Affiliation(s)
- D. Kumar
- Department of Chemical Engineering & Technology
- IIT (BHU)
- Varanasi-221005
- India
| | - T. Das
- Department of Chemical Engineering & Technology
- IIT (BHU)
- Varanasi-221005
- India
| | - B. S. Giri
- Department of Chemical Engineering & Technology
- IIT (BHU)
- Varanasi-221005
- India
| | - B. Verma
- Department of Chemical Engineering & Technology
- IIT (BHU)
- Varanasi-221005
- India
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Garikipati S, Prakash A, Alhilali M, Burnett A, Lee C, Young R, Danson S, Bates E, Fisher P, Hatton M, Das T. Management and outcomes of patients with small cell lung cancer in North Trent. Lung Cancer 2018. [DOI: 10.1016/s0169-5002(18)30194-6] [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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Robinson S, Absalom K, Das T, Lee C, Fisher P, Bates E, Hatton M. Post-operative radiotherapy (PORT) for incompletely resected non-small cell lung cancer (NSCLC): single centre audit of outcomes. Lung Cancer 2018. [DOI: 10.1016/s0169-5002(18)30180-6] [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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Low L, Salawu A, Bates E, Young R, Danson S, Fisher P, Hatton M, Lee C, Das T, Taylor F. The North Trent experience of administering pembrolizumab to previously treated patients with advanced non-small cell lung cancer. Lung Cancer 2018. [DOI: 10.1016/s0169-5002(18)30110-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Robinson S, Absalom K, Lankathilake A, Das T, Lee C, Fisher P, Bates E, Hatton M. Radical radiotherapy for non-small cell lung cancer (NSCLC): real world outcomes for two accelerated fractionation schedules. Lung Cancer 2018. [DOI: 10.1016/s0169-5002(18)30189-2] [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: 10/18/2022]
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Bhardwwaj P, Batra S, Dhopte S, Das T. Fibroid Degeneration - Myriad Presentation and Laparoscopic Management. J Minim Invasive Gynecol 2017. [DOI: 10.1016/j.jmig.2017.08.566] [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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Abstract
The prepsychotic phase of schizophrenia is not only important for indicated prevention strategies, but also crucial for developing mechanistic models of the emergence of frank psychosis (transition). This commentary highlights the work of Dukart and colleagues, published in this issue of the Journal of Psychiatry and Neurosicence, who sought to identify MRI-based anatomic endophenotypes of psychosis in a well-characterized sample of patients with at-risk mental state (ARMS) and first-episode psychosis (FEP). Conceptual and translational challenges in clarifying the neurobiology of transitional prepsychotic states are discussed. A role of intracortical myelin in the neurobiology of transition is proposed. Transition may not be an outcome of "progressive structural deficits"; it may occur due to inadequate compensatory responses in the predisposed. The need to revise our current "deficit-oriented" models of neurobiology of psychosis in the wake of burgeoning evidence indicating a dynamic process of cortical reorganization is emphasized.
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Affiliation(s)
- Lena Palaniyappan
- Correspondence to: L. Palaniyappan, Prevention & Early Intervention Program for Psychoses (PEPP), A2-636, LHSC-VH, 800 Commissioners Road, London, Ont., Canada N6A 5W9;
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Li M, Das T, Deng W, Wang Q, Li Y, Zhao L, Ma X, Wang Y, Yu H, Li X, Meng Y, Palaniyappan L, Li T. Clinical utility of a short resting-state MRI scan in differentiating bipolar from unipolar depression. Acta Psychiatr Scand 2017; 136:288-299. [PMID: 28504840 DOI: 10.1111/acps.12752] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/18/2017] [Indexed: 02/05/2023]
Abstract
OBJECTIVE Depression in bipolar disorder (BipD) requires a therapeutic approach that is from treating unipolar major depressive disorder (UniD), but to date, no reliable methods could separate these two disorders. The aim of this study was to establish the clinical validity and utility of a non-invasive functional MRI-based method to classify BipD from UniD. METHOD The degree of connectivity (degree centrality or DC) of every small unit (voxel) with every other unit of the brain was estimated in 22 patients with BipD and 22 age, gender, and depressive severity-matched patients with UniD and 22 healthy controls. Pattern classification analysis was carried out using a support-vector machine (SVM) approach. RESULTS Degree centrality pattern from 8-min resting fMRI discriminated BipD from UniD with an accuracy of 86% and diagnostic odds ratio of 9.6. DC was reduced in the left insula and increased in bilateral precuneus in BipD when compared to UniD. In this sample with a high degree of uncertainty (50% prior probability), positive predictive value of the DC test was 79%. CONCLUSION Degree centrality maps are potential candidate measures to separate bipolar depression from unipolar depression. Test performance reported here requires further pragmatic evaluation in regular clinical practice.
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Affiliation(s)
- M Li
- Mental Health Center, West China Hospital of Sichuan University, Chengdu, China.,State Key Laboratory of Biotherapy, Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,West China Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - T Das
- Robarts Research Institute & The Brain and Mind Institute, University of Western Ontario, London, ON, Canada.,Department of Psychiatry, University of Western Ontario, London, ON, Canada.,Lawson Health Research Institute, London, ON, Canada
| | - W Deng
- Mental Health Center, West China Hospital of Sichuan University, Chengdu, China.,State Key Laboratory of Biotherapy, Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,West China Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - Q Wang
- Mental Health Center, West China Hospital of Sichuan University, Chengdu, China.,State Key Laboratory of Biotherapy, Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,West China Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - Y Li
- Mental Health Center, West China Hospital of Sichuan University, Chengdu, China.,State Key Laboratory of Biotherapy, Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,West China Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - L Zhao
- Mental Health Center, West China Hospital of Sichuan University, Chengdu, China.,State Key Laboratory of Biotherapy, Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,West China Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - X Ma
- Mental Health Center, West China Hospital of Sichuan University, Chengdu, China.,State Key Laboratory of Biotherapy, Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,West China Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - Y Wang
- Mental Health Center, West China Hospital of Sichuan University, Chengdu, China.,State Key Laboratory of Biotherapy, Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,West China Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - H Yu
- Mental Health Center, West China Hospital of Sichuan University, Chengdu, China.,State Key Laboratory of Biotherapy, Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,West China Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - X Li
- Mental Health Center, West China Hospital of Sichuan University, Chengdu, China.,State Key Laboratory of Biotherapy, Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,West China Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - Y Meng
- Mental Health Center, West China Hospital of Sichuan University, Chengdu, China.,State Key Laboratory of Biotherapy, Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,West China Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - L Palaniyappan
- Robarts Research Institute & The Brain and Mind Institute, University of Western Ontario, London, ON, Canada.,Department of Psychiatry, University of Western Ontario, London, ON, Canada.,Lawson Health Research Institute, London, ON, Canada
| | - T Li
- Mental Health Center, West China Hospital of Sichuan University, Chengdu, China.,State Key Laboratory of Biotherapy, Psychiatric Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,West China Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
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Goyal P, Padhi TR, Das T, Pradhan L, Sutar S, Butola S, Behera UC, Jain L, Jalali S. Outcome of universal newborn eye screening with wide-field digital retinal image acquisition system: a pilot study. Eye (Lond) 2017; 32:67-73. [PMID: 28737759 DOI: 10.1038/eye.2017.129] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 04/27/2017] [Indexed: 12/25/2022] Open
Abstract
PurposeTo evaluate the outcome of universal newborn eye screening with wide-field digital retinal imaging (WFDRI) system.MethodsIn this pilot study, we examined 1152 apparently healthy newborn infants in the obstetrics and gynecology ward of a civil hospital in Eastern India over 1.5 years. The examination included external eye examination, red reflex test and fundus imaging by WFDRI (RetCam II, Clarity medical system, Pleasanton, CA, USA) by a trained optometrist. The pathologies detected, net monetary gain and skilled manpower saved were documented. The results were compared with three similar studies thus far published in the literature.ResultsOcular abnormality of any kind was seen in 172 (14.93%) babies. Retinal hemorrhage in 153 babies (88.9% of all abnormal findings) was the most common abnormality; it was bilateral in 118 (77.12%) babies and 4 babies had foveal hemorrhage. Other abnormalities included vitreous hemorrhage (n=1), congenital glaucoma (n=2), uveal coloboma (n=2), retinopathy mimicking retinopathy of prematurity (n=2), and cystic fovea (n=3). The retinal hemorrhages resolved spontaneously in all eyes. One baby with congenital glaucoma received surgery and the other was treated medically. The benefits included savings in skilled manpower, a net monetary gain of INR 4.195 million (US$ 62,612) and skilled manpower saving by 319.4 h.ConclusionsThe universal neonatal eye screening using WFDRI detected pathologies that needed immediate care or regular follow up; saved skilled manpower with a net monetary gain. But compared to a red reflex test the benefits were marginal in terms of detecting treatment warranting ocular pathologies.
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Affiliation(s)
- P Goyal
- Retina and Vitreous services, Shri Mithu Tulsi Chanrai Campus, LV Prasad Eye Institute, Bhubaneswar, India
| | - T R Padhi
- Retina and Vitreous services, Shri Mithu Tulsi Chanrai Campus, LV Prasad Eye Institute, Bhubaneswar, India
| | - T Das
- Smt. Kanuri Santhamma Center for Vitreoretinal Services, Kallam Anji Reddy Campus, LV Prasad Eye Institute, Hyderabad, India
| | - L Pradhan
- Infosys Pediatric Center, Capital Hospital, Bhubaneswar, India
| | - S Sutar
- Retina and Vitreous services, Shri Mithu Tulsi Chanrai Campus, LV Prasad Eye Institute, Bhubaneswar, India
| | - S Butola
- Retina and Vitreous services, Shri Mithu Tulsi Chanrai Campus, LV Prasad Eye Institute, Bhubaneswar, India
| | - U C Behera
- Retina and Vitreous services, Shri Mithu Tulsi Chanrai Campus, LV Prasad Eye Institute, Bhubaneswar, India
| | - L Jain
- Retina and Vitreous services, Shri Mithu Tulsi Chanrai Campus, LV Prasad Eye Institute, Bhubaneswar, India
| | - S Jalali
- Smt. Kanuri Santhamma Center for Vitreoretinal Services, Kallam Anji Reddy Campus, LV Prasad Eye Institute, Hyderabad, India
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Fatema K, Das T, Mannan A, Zaman SM. Frequency, Distribution of Congenital Anomaly and Associated Maternal Risk Factors. Mymensingh Med J 2017; 26:658-666. [PMID: 28919624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This study was done to find out the maternal risk factors associated with congenital anomaly. This cross-sectional observational study was carried out in the Department of Obstetrics and Gynaecology, Bangabandhu Sheikh Mujib Medical University (BSMMU) Hospital, Dhaka, Bangladesh from January 2011 to December 2011. During this study period 78 patients had pregnancy with congenital anomaly and delivered in the Department of Obstetrics and Gynaecology. Women with ultrasound report of congenitally abnormal fetus irrespective of gestational age were included. Clinical evaluation of neonates was done by experienced neonatologist. The frequency of congenital anomaly was 3.46%. Most of the women belong to age <35 years (97.43%). Congenital anomalies more commonly were seen in the primiparas (64.10%). Most frequent associated risk factor was the history of abortions (35.89%). Maternal infections during antenatal period were also high (15.58%). There were 58 males (74.35%) and 20 females (25.64%). There was positive history of delivery of congenital abnormal babies in 6 cases (7.6%). Mothers of eight cases (10.25%) had history of drug ingestion during pregnancy. Four cases (5.12%) of mothers had hypothyroidism and 6 cases of mothers (7.69%) had diabetes mellitus respectively.
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Affiliation(s)
- K Fatema
- Dr Kaniz Fatema, Assistant Professor, Department of Obstetrics and Gynecology, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh
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Das T, Simmons D. The Hausdorff and dynamical dimensions of self-affine sponges: a dimension gap result. Invent Math 2017; 210:85-134. [PMID: 32009667 PMCID: PMC6961517 DOI: 10.1007/s00222-017-0725-5] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 03/25/2017] [Indexed: 06/10/2023]
Abstract
We construct a self-affine sponge in R 3 whose dynamical dimension, i.e. the supremum of the Hausdorff dimensions of its invariant measures, is strictly less than its Hausdorff dimension. This resolves a long-standing open problem in the dimension theory of dynamical systems, namely whether every expanding repeller has an ergodic invariant measure of full Hausdorff dimension. More generally we compute the Hausdorff and dynamical dimensions of a large class of self-affine sponges, a problem that previous techniques could only solve in two dimensions. The Hausdorff and dynamical dimensions depend continuously on the iterated function system defining the sponge, implying that sponges with a dimension gap represent a nonempty open subset of the parameter space.
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Affiliation(s)
- Tushar Das
- Department of Mathematics and Statistics, University of Wisconsin – La Crosse, 1725 State Street, La Crosse, WI 54601 USA
| | - David Simmons
- Department of Mathematics, University of York, Heslington, York, YO10 5DD UK
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Kakoudaki M, Marshall R, Danson S, Fisher P, Hatton M, Lee C, Das T, Bates E, Woll P, Taylor F. 67: Outcomes of patients in South Yorkshire who received maintenance pemetrexed treatment for non-squamous, non-small-cell cancer after induction chemotherapy with pemetrexed and cisplatin. Lung Cancer 2017. [DOI: 10.1016/s0169-5002(17)30117-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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John JK, Sethi M, Das T, Hingade SS, Arun A, Tomar N, Saikumar G. Occurrence of Opisthorchis spp. infection in liver of pigs: An abattoir survey. ACTA ACUST UNITED AC 2017. [DOI: 10.5958/0973-970x.2017.00031.1] [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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Abstract
Medication nonadherence is a known problem after renal transplantation and can vary from one setting to another. Since it can lead to negative outcomes, it is important to develop intervention strategies to enhance adherence in a given setting using determinants identified through exploratory studies. We explored nonadherence in renal transplant recipients. A longitudinal survey was done with adult renal transplant recipients at a tertiary care public and two private hospitals of Kolkata. Subjects were followed-up for 1 year. After screening for medication adherence status by the four-item Morisky Medication Adherence Scale, those admitting to potential nonadherence were probed further. A patient was deemed to be nonadherent if failing to take medicines on appointed time (doses missed or delayed by more than 2 h) more than three times in any month during the observation period. A pretested questionnaire was used to explore potential determinants of nonadherence. Data of 153 patients recruited over a 2-year were analyzed. The extent of nonadherence with immunosuppressant regimens was about 31% overall; 44% in the public sector and 19% in the private sector (P < 0.001). Nonadherence with other medication was around 19% in both the sectors. Several potential demographic, socioeconomic and psychosocial determinants of nonadherence were identified on univariate analysis. However, logistic regression analysis singled out only the economic status. This study had updated the issue of nonadherence in renal transplant recipients in the Indian setting. Strategies to improve medication adherence can be planned by relevant stakeholders on the basis of these findings.
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Affiliation(s)
| | - A Taraphder
- Department of Nephrology, Institute of Postgraduate Medical Education and Research, Kolkata, West Bengal, India
| | - A Hazra
- Department of Pharmacology, Institute of Postgraduate Medical Education and Research, Kolkata, West Bengal, India
| | - T Das
- Department of Medicine, Institute of Postgraduate Medical Education and Research, Kolkata, West Bengal, India
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Nair RR, Padhee S, Das T, Green R, Howell M, Mohapatra SS, Mohapatra S. Three- and Four-Dimensional Spheroid and FiSS Tumoroid Cultures: Platforms for Drug Discovery and Development and Translational Research. Crit Rev Ther Drug Carrier Syst 2017; 34:185-208. [DOI: 10.1615/critrevtherdrugcarriersyst.2017018042] [Citation(s) in RCA: 6] [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: 11/13/2022]
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Yuan J, Usman A, Das T, Patterson AJ, Gillard JH, Graves MJ. Imaging Carotid Atherosclerosis Plaque Ulceration: Comparison of Advanced Imaging Modalities and Recent Developments. AJNR Am J Neuroradiol 2016; 38:664-671. [PMID: 28007772 DOI: 10.3174/ajnr.a5026] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Atherosclerosis remains the leading cause of long-term mortality and morbidity worldwide, despite remarkable advancement in its management. Vulnerable atherosclerotic plaques are principally responsible for thromboembolic events in various arterial territories such as carotid, coronary, and lower limb vessels. Carotid plaque ulceration is one of the key features associated with plaque vulnerability and is considered a notable indicator of previous plaque rupture and possible future cerebrovascular events. Multiple imaging modalities have been used to assess the degree of carotid plaque ulceration for diagnostic and research purposes. Early diagnosis and management of carotid artery disease could prevent further cerebrovascular events. In this review, we highlight the merits and limitations of various imaging techniques for identifying plaque ulceration.
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Affiliation(s)
- J Yuan
- From the Department of Radiology (J.Y., A.U., J.H.G., M.J.G.), University of Cambridge, Cambridge, UK
| | - A Usman
- From the Department of Radiology (J.Y., A.U., J.H.G., M.J.G.), University of Cambridge, Cambridge, UK
| | - T Das
- Department of Radiology (T.D., A.J.P., M.J.G.), Cambridge University Hospitals National Health Service Foundation Trust, Cambridge, UK
| | - A J Patterson
- Department of Radiology (T.D., A.J.P., M.J.G.), Cambridge University Hospitals National Health Service Foundation Trust, Cambridge, UK
| | - J H Gillard
- From the Department of Radiology (J.Y., A.U., J.H.G., M.J.G.), University of Cambridge, Cambridge, UK
| | - M J Graves
- From the Department of Radiology (J.Y., A.U., J.H.G., M.J.G.), University of Cambridge, Cambridge, UK.,Department of Radiology (T.D., A.J.P., M.J.G.), Cambridge University Hospitals National Health Service Foundation Trust, Cambridge, UK
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48
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Das T, Stratmann BO, Urbański M. The Bishop–Jones relation and Hausdorff geometry of convex-cobounded limit sets in infinite-dimensional hyperbolic space. STOCH DYNAM 2016. [DOI: 10.1142/s0219493716500180] [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] [Indexed: 11/18/2022]
Abstract
We generalize the mass redistribution principle and apply it to prove the Bishop–Jones relation for limit sets of metrically proper isometric actions on real infinite-dimensional hyperbolic space. We also show that the Hausdorff and packing measures on the limit sets of convex-cobounded groups are finite and positive and coincide with the conformal Patterson measure, up to a multiplicative constant.
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Affiliation(s)
- Tushar Das
- Department of Mathematics, University of Wisconsin – La Crosse, La Crosse, WI 54601, USA
| | - Bernd O. Stratmann
- Fachbereich 3 – Mathematik, Universität Bremen, Postfach 330440, Bibliothekstrasse 1, 28359 Bremen, Germany
| | - Mariusz Urbański
- Department of Mathematics, University of North Texas, P. O. Box 311430, Denton, TX 76203-1430, USA
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49
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Brost E, Brooks J, Piepenburg J, Chakraborty S, Das T, Green A, Watanabe Y, Hui S. SU-G-TeP3-07: On the Development of Mechano-Biological Assessment of Leukemia Cells Using Optical Tweezers. Med Phys 2016. [DOI: 10.1118/1.4957087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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50
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Guldenmund P, Gantner IS, Baquero K, Das T, Demertzi A, Boveroux P, Bonhomme V, Vanhaudenhuyse A, Bruno MA, Gosseries O, Noirhomme Q, Kirsch M, Boly M, Owen AM, Laureys S, Gómez F, Soddu A. Propofol-Induced Frontal Cortex Disconnection: A Study of Resting-State Networks, Total Brain Connectivity, and Mean BOLD Signal Oscillation Frequencies. Brain Connect 2016; 6:225-37. [PMID: 26650183 DOI: 10.1089/brain.2015.0369] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Propofol is one of the most commonly used anesthetics in the world, but much remains unknown about the mechanisms by which it induces loss of consciousness. In this resting-state functional magnetic resonance imaging study, we examined qualitative and quantitative changes of resting-state networks (RSNs), total brain connectivity, and mean oscillation frequencies of the regional blood oxygenation level-dependent (BOLD) signal, associated with propofol-induced mild sedation and loss of responsiveness in healthy subjects. We found that detectability of RSNs diminished significantly with loss of responsiveness, and total brain connectivity decreased strongly in the frontal cortex, which was associated with increased mean oscillation frequencies of the BOLD signal. Our results suggest a pivotal role of the frontal cortex in propofol-induced loss of responsiveness.
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Affiliation(s)
- Pieter Guldenmund
- 1 Coma Science Group, Cyclotron Research Center, CHU University Hospital, University of Liège , Liège, Belgium
| | - Ithabi S Gantner
- 1 Coma Science Group, Cyclotron Research Center, CHU University Hospital, University of Liège , Liège, Belgium
| | - Katherine Baquero
- 2 Computer Imaging and Medical Applications Laboratory, National University of Colombia , Bogotá, Colombia
- 3 MoVeRe Group, Cyclotron Research Center, University of Liège , Liège, Belgium
| | - Tushar Das
- 4 Department of Physics and Astronomy, Brain and Mind Institute, University of Western Ontario , London, Ontario, Canada
| | - Athena Demertzi
- 1 Coma Science Group, Cyclotron Research Center, CHU University Hospital, University of Liège , Liège, Belgium
- 5 Department of Neurology, CHU University Hospital, University of Liège , Liège, Belgium
| | - Pierre Boveroux
- 6 Department of Anesthesia and Intensive Care Medicine, CHU University Hospital, University of Liège , Liège, Belgium
| | - Vincent Bonhomme
- 6 Department of Anesthesia and Intensive Care Medicine, CHU University Hospital, University of Liège , Liège, Belgium
- 7 Department of Anesthesia and Intensive Care Medicine, CHR Hospital Citadelle , Liège, Belgium
| | - Audrey Vanhaudenhuyse
- 1 Coma Science Group, Cyclotron Research Center, CHU University Hospital, University of Liège , Liège, Belgium
- 8 Department of Algology and Palliative Care, CHU University Hospital, University of Liège , Liège, Belgium
| | - Marie-Aurélie Bruno
- 1 Coma Science Group, Cyclotron Research Center, CHU University Hospital, University of Liège , Liège, Belgium
- 5 Department of Neurology, CHU University Hospital, University of Liège , Liège, Belgium
| | - Olivia Gosseries
- 1 Coma Science Group, Cyclotron Research Center, CHU University Hospital, University of Liège , Liège, Belgium
- 5 Department of Neurology, CHU University Hospital, University of Liège , Liège, Belgium
| | - Quentin Noirhomme
- 1 Coma Science Group, Cyclotron Research Center, CHU University Hospital, University of Liège , Liège, Belgium
| | - Muriëlle Kirsch
- 1 Coma Science Group, Cyclotron Research Center, CHU University Hospital, University of Liège , Liège, Belgium
- 6 Department of Anesthesia and Intensive Care Medicine, CHU University Hospital, University of Liège , Liège, Belgium
| | - Mélanie Boly
- 9 Department of Neurology, University of Wisconsin , Madison, Wisconsin
| | - Adrian M Owen
- 10 Department of Psychology, Brain and Mind Institute, University of Western Ontario , London, Ontario, Canada
| | - Steven Laureys
- 1 Coma Science Group, Cyclotron Research Center, CHU University Hospital, University of Liège , Liège, Belgium
- 5 Department of Neurology, CHU University Hospital, University of Liège , Liège, Belgium
| | - Francisco Gómez
- 11 Department of Computer Science, Central University of Colombia , Bogotá, Colombia
| | - Andrea Soddu
- 4 Department of Physics and Astronomy, Brain and Mind Institute, University of Western Ontario , London, Ontario, Canada
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