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Maji K, Sarkar J, Mandal S, H S, Hingankar M, Mukherjee A, Samal S, Bhattacharjee A, Patankar MP, Watanabe K, Taniguchi T, Deshmukh MM. Superconducting Cavity-Based Sensing of Band Gaps in 2D Materials. Nano Lett 2024; 24:4369-4375. [PMID: 38393831 DOI: 10.1021/acs.nanolett.3c04990] [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] [Subscribe] [Scholar Register] [Indexed: 02/25/2024]
Abstract
The superconducting coplanar waveguide (SCPW) cavity plays an essential role in various areas like superconducting qubits, parametric amplifiers, radiation detectors, and studying magnon-photon and photon-phonon coupling. Despite its wide-ranging applications, the use of SCPW cavities to study various van der Waals 2D materials has been relatively unexplored. The resonant modes of the SCPW cavity exquisitely sense the dielectric environment. In this work, we measure the charge compressibility of bilayer graphene coupled to a half-wavelength SCPW cavity. Our approach provides a means to detect subtle changes in the capacitance of the bilayer graphene heterostructure, which depends on the compressibility of bilayer graphene, manifesting as shifts in the resonant frequency of the cavity. This method holds promise for exploring a wide class of van der Waals 2D materials, including transition metal dichalcogenides (TMDs) and their moiré, where DC transport measurement is challenging.
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Affiliation(s)
- Krishnendu Maji
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
| | - Joydip Sarkar
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
| | - Supriya Mandal
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
| | - Sriram H
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
| | - Mahesh Hingankar
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
| | - Ayshi Mukherjee
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
| | - Soumyajit Samal
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
| | - Anirban Bhattacharjee
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
| | - Meghan P Patankar
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
| | - Kenji Watanabe
- Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Takashi Taniguchi
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Mandar M Deshmukh
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
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Ghosh V, Bhattacharjee A, Kumar A, Ojha PK. q-RASTR modelling for prediction of diverse toxic chemicals towards T. pyriformis. SAR QSAR Environ Res 2024; 35:11-30. [PMID: 38193248 DOI: 10.1080/1062936x.2023.2298452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 12/16/2023] [Indexed: 01/10/2024]
Abstract
A series of diverse organic compounds impose serious detrimental effects on the health of living organisms and the environment. Determination of the structural aspects of compounds that impart toxicity and evaluation of the same is crucial before public usage. The present study aims to determine the structural characteristics of compounds for Tetrahymena pyriformis toxicity using the q-RASTR (Quantitative Read Across Structure-Toxicity Relationship) model. It was developed using RASTR and 2-D descriptors for a dataset of 1792 compounds with defined endpoint (pIGC50) against a model organism, T. pyriformis. For the current study, the whole dataset was divided based on activity/property into the training and test sets, and the q-RASTR model was developed employing six descriptors (three latent variables) having r2, Q2F1 and Q2 values of 0.739, 0.767, and 0.735, respectively. The generated model was thoroughly validated using internationally recognized internal and external validation criteria to assess the model's dependability and predictability. It was highlighted that high molecular weight, aromatic hydroxyls, nitrogen, double bonds, and hydrophobicity increase the toxicity of organic compounds. The current study demonstrates the applicability of the RASTR algorithm in QSTR model development for the prediction of toxic chemicals (pIGC50) towards T. pyriformis.
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Affiliation(s)
- V Ghosh
- Drug Discovery and Development Laboratory (DDD Lab), Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
| | - A Bhattacharjee
- Drug Discovery and Development Laboratory (DDD Lab), Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
| | - A Kumar
- Drug Discovery and Development Laboratory (DDD Lab), Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
| | - P K Ojha
- Drug Discovery and Development Laboratory (DDD Lab), Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
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3
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Anand RK, Bhattacharjee A, Baidya DK, Subramaniam R, Rewari V, Ray BR, Khanna P, Jana M. Feasibility of anterior temporalis muscle ultrasound for assessing muscle wasting in ICU: a prospective cohort study. J Ultrasound 2023; 26:653-661. [PMID: 35879490 PMCID: PMC10468482 DOI: 10.1007/s40477-022-00703-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 06/21/2022] [Indexed: 10/16/2022] Open
Abstract
PURPOSE Skeletal muscle ultrasound is a valuable tool for assessing muscle wasting in ICU. Previous studies on skeletal muscle ultrasound in ICU have been performed on lower limb muscles. The current study is formulated to assess the feasibility and reliability of anterior temporalis (AT) muscle ultrasound for measuring muscle wasting in ICU. METHODS In this prospective cohort study in 48 critically ill patients with sepsis, muscle layer thicknesses (MLTs) and mean grayscale (GS) values of anterior temporalis muscles and quadriceps femoris (Q) were measured at baseline and serially till 7 days. Correlation was made between baseline and change in MLT and GS values of AT and Q muscle and these parameters were compared between ICU survivors and non survivors. RESULTS Baseline anterior temporalis MLTs or their longitudinal changes over 7 days did not correlate significantly with the corresponding parameters of quadriceps femoris muscles. The baseline GS values of two muscle groups correlated weakly at baseline, but the change in GS over 7 days showed no correlation. The baseline MLTs of both muscle groups and their longitudinal change over 7 days did not correlate with ICU length of stay. The change in MLT of AT over 7 days was significantly greater in ICU non-survivors compared to survivors. CONCLUSION Measurement of ultrasonographic muscle layer thickness and grayscale parameters of anterior temporalis muscle did not show good correlation with that of quadriceps muscle.
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Affiliation(s)
- Rahul Kumar Anand
- Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | | | - Dalim Kumar Baidya
- Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | - Rajeshwari Subramaniam
- Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | - Vimi Rewari
- Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | - Bikash Ranjan Ray
- Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | - Puneet Khanna
- Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | - Manisha Jana
- Department of Radiology, All India Institute of Medical Sciences, New Delhi, India
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Bhattacharjee A, Chanda R. Psychology of consumer: study of factors influencing buying behavior of millennials towards fast-fashion brands. CM 2022. [DOI: 10.18137/cardiometry.2022.23.360-368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
India is a growing economy, and fast fashion has boomed over recent years since it has been following trends and targeting the correct audience, i.e., millennials. This research aims to analyze the factors that influence the buying behavior of millennials towards fast fashion brands. This study also focuses on examining the millennials decision influenced buying behavior. Respondents were polled using an electronic survey method. A quantitative method was carried out to explore the responses; the decision to use this approach was primarily influenced by the desire to examine the trend of the millennial generation’s fast fashion and purchasing habits by introducing a societal viewpoint. The sample population consists of millennials who use the above-mentioned brands. The findings show that independent factors chosen for this study have a positive impact on purchase intention. The study provides useful context concerning the purchase intention of fast fashion brands in India and how buying behavior of millennials is affected.
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Abstract
Fuzzy membership is an effective approach used in twin support vector machines (SVMs) to reduce the effect of noise and outliers in classification problems. Fuzzy twin SVMs (TWSVMs) assign membership weights to reduce the effect of outliers, however, it ignores the positioning of the input data samples and hence fails to distinguish between support vectors and noise. To overcome this issue, intuitionistic fuzzy TWSVM combined the concept of intuitionistic fuzzy number with TWSVMs to reduce the effect of outliers and distinguish support vectors from noise. Despite these benefits, TWSVMs and intuitionistic fuzzy TWSVMs still suffer from some drawbacks as: 1) the local neighborhood information is ignored among the data points and 2) they solve quadratic programming problems (QPPs), which is computationally inefficient. To overcome these issues, we propose a novel intuitionistic fuzzy weighted least squares TWSVMs for classification problems. The proposed approach uses local neighborhood information among the data points and also uses both membership and nonmembership weights to reduce the effect of noise and outliers. The proposed approach solves a system of linear equations instead of solving the QPPs which makes the model more efficient. We evaluated the proposed intuitionistic fuzzy weighted least squares TWSVMs on several benchmark datasets to show the efficiency of the proposed model. Statistical analysis is done to quantify the results statistically. As an application, we used the proposed model for the diagnosis of Schizophrenia disease.
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Baidya D, Bhattacharyya A, Bhattacharjee A, Pande A. Right ventricular dysfunction in COVID-19. J Anaesthesiol Clin Pharmacol 2022; 38:S142-S143. [PMID: 36060167 PMCID: PMC9438837 DOI: 10.4103/joacp.joacp_486_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 04/14/2021] [Accepted: 04/17/2021] [Indexed: 11/29/2022] Open
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7
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Maitra S, Roy A, Behera S, Pande A, Bhattacharjee A, Bhattacharyya A, Baidya D, Anand R, Ray B, Subramaniam R. Physiological effect of prone positioning in mechanically ventilated SARS-CoV-2- infected patients with severe ARDS: An observational study. J Anaesthesiol Clin Pharmacol 2022; 38:S120-S124. [PMID: 36060194 PMCID: PMC9438844 DOI: 10.4103/joacp.joacp_282_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 08/17/2021] [Accepted: 08/19/2021] [Indexed: 11/04/2022] Open
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Menon N, Patil V, Noronha V, Joshi A, Mathrudev V, Bhattacharjee A, Chandrasekharan A, Srinivas S, Vallathol D, Chaturvedi P, Chaukar D, Pai P, Nair S, Thiagrajan S, Ghosh Laskar S, Nawale K, Dhumal S, Tambe R, Banavali S, Prabhash K. 865MO RMAC study: A randomized study evaluating the efficacy of metronomic adjuvant chemotherapy in patients with recurrent head and neck cancers post salvage surgery, not eligible for re-irradiation. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1275] [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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Rodríguez E, Bhattacharjee A. Connection between quasisymmetric magnetic fields and anisotropic pressure equilibria in fusion plasmas. Phys Rev E 2021; 104:015213. [PMID: 34412365 DOI: 10.1103/physreve.104.015213] [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] [Received: 04/07/2021] [Accepted: 06/30/2021] [Indexed: 11/07/2022]
Abstract
The stellarator as a concept of magnetic confinement fusion requires careful design to confine particles effectively. A design possibility is to equip the magnetic field with a property known as quasisymmetry. Though it is generally believed that a steady-state quasisymmetric equilibrium can only be exact locally (unless the system has a direction of continuous symmetry such as the tokamak), we suggest in this work that a change in the equilibrium paradigm can ameliorate this limitation. We demonstrate that there exists a deep physical connection between quasisymmetry and magnetostatic equilibria with anisotropic pressure, extending beyond the isotropic pressure equilibria commonly considered.
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Affiliation(s)
- E Rodríguez
- Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey, 08543, USA and Princeton Plasma Physics Laboratory, Princeton, New Jersey, 08540, USA
| | - A Bhattacharjee
- Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey, 08543, USA and Princeton Plasma Physics Laboratory, Princeton, New Jersey, 08540, USA
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Lokki AI, Teirilä L, Triebwasser M, Daly E, Bhattacharjee A, Uotila L, Llort Asens M, Kurki MI, Perola M, Auro K, Salmon JE, Daly M, Atkinson JP, Laivuori H, Fagerholm S, Meri S. Dysfunction of complement receptors CR3 (CD11b/18) and CR4 (CD11c/18) in pre-eclampsia: a genetic and functional study. BJOG 2021; 128:1282-1291. [PMID: 33539617 DOI: 10.1111/1471-0528.16660] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/01/2020] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To study genetic variants and their function within genes coding for complement receptors in pre-eclampsia. DESIGN A case-control study. SETTING Pre-eclampsia is a common vascular disease of pregnancy. The clearance of placenta-derived material is one of the functions of the complement system in pregnancy. POPULATION We genotyped 500 women with pre-eclamptic pregnancies and 190 pregnant women without pre-eclampsia, as controls, from the FINNPEC cohort, and 122 women with pre-eclamptic pregnancies and 1905 controls from the national FINRISK cohort. METHODS The functional consequences of genotypes discovered by targeted exomic sequencing were explored by analysing the binding of the main ligand iC3b to mutated CR3 or CR4, which were transiently expressed on the surface of COS-1 cells. MAIN OUTCOME MEASURES Allele frequencies were compared between pre-eclamptic pregnancies and controls in genetic studies. The functional consequences of selected variants were measured by binding assays. RESULTS The most significantly pre-eclampsia-linked CR3 variant M441K (P = 4.27E-4, OR = 1.401, 95% CI = 1.167-1.682) displayed a trend of increased adhesion to iC3b (P = 0.051). The CR4 variant A251T was found to enhance the adhesion of CR4 to iC3b, whereas W48R resulted in a decrease of the binding of CR4 to iC3b. CONCLUSIONS Results suggest that changes in complement-facilitated phagocytosis are associated with pre-eclampsia. Further studies are needed to ascertain whether aberrant CR3 and CR4 activity leads to altered pro- and anti-inflammatory cytokine responses in individuals carrying the associated variants, and the role of these receptors in pre-eclampsia pathogenesis. TWEETABLE ABSTRACT Genetic variants of complement receptors CR3 and CR4 have functional consequences that are associated with pre-eclampsia.
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Affiliation(s)
- A I Lokki
- Translational Immunology Research Program, Research Programs Unit, University of Helsinki, Helsinki, Finland.,Department of Obstetrics and Gynecology, Faculty of Medicine and Health Technology, Tampere University Hospital, Tampere University, Tampere, Finland
| | - L Teirilä
- Translational Immunology Research Program, Research Programs Unit, University of Helsinki, Helsinki, Finland.,Bacteriology and immunology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - M Triebwasser
- Department of Medicine, Division of Rheumatology, Washington University School of Medicine, Saint Louis, MO, USA
| | - E Daly
- Hospital and Harvard Medical School, Boston, MA, USA
| | - A Bhattacharjee
- Herantis Pharma Plc, Espoo, Finland.,Neuroscience Center, HiLife, University of Helsinki, Helsinki, Finland
| | - L Uotila
- Research Services, University of Helsinki, Helsinki, Finland
| | - M Llort Asens
- Molecular and Integrative Biosciences Research Program, Faculty of Bio- and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - M I Kurki
- Neurosurgery of Neuro Center, Kuopio University Hospital, Finland.,Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - M Perola
- Department of Health, National Institute for Health and Welfare, Helsinki, Finland
| | - K Auro
- Department of Government Services, National Institute for Health and Welfare, Helsinki, Finland
| | - J E Salmon
- Hospital for Special Surgery-Weill Cornell Medicine, Department of Medicine, New York, NY, USA
| | - M Daly
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA, USA.,Institute for Molecular Medicine Finland, Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
| | - J P Atkinson
- Department of Medicine, Division of Rheumatology, Washington University School of Medicine, Saint Louis, MO, USA
| | - H Laivuori
- Department of Obstetrics and Gynecology, Faculty of Medicine and Health Technology, Tampere University Hospital, Tampere University, Tampere, Finland.,Institute for Molecular Medicine Finland, Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland.,Medical and Clinical Genetics, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - S Fagerholm
- Molecular and Integrative Biosciences Research Program, Faculty of Bio- and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - S Meri
- Translational Immunology Research Program, Research Programs Unit, University of Helsinki, Helsinki, Finland.,Bacteriology and immunology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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- Medical and Clinical Genetics, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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Bhattacharjee A, Anand RK, Baidya DK, Ray BR. Closed endotracheal suction catheter system related complications in mechanically ventilated COVID-19 patients. Indian J Anaesth 2021; 65:254-256. [PMID: 33776119 PMCID: PMC7989479 DOI: 10.4103/ija.ija_1050_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 10/09/2020] [Accepted: 02/09/2021] [Indexed: 11/04/2022] Open
Affiliation(s)
- Anirban Bhattacharjee
- Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | - Rahul Kumar Anand
- Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | - Dalim Kumar Baidya
- Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | - Bikash Ranjan Ray
- Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
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12
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Bhowmik D, Bhattacharjee A, Dhar Chanda D. Detection of diverse SCCmec types and virulence determinants in MRSA associated with Hospital infections using a novel PCR based assay. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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13
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Das B, Bhattacharjee A, Singha K, Dhar (chanda) D. Carriage of blaOXA-23 and blaOXA-48 via Inc FREPB and Inc K/B type of plasmids within multidrug resistant Escherichia coli and Klebsiella pneumoniae. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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14
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Chetri S, Das B, Bhowmik D, Chanda D, Bhattacharjee A. Carbapenem non-susceptibility associated with global transcriptional regulator MarA in Escherichia coli. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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15
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Deshamukhya C, Bhattacharjee A, Das B, Paul D, Chanda DD. cupA1/cupA5 gene overexpressed at subinhibitory concentration of carbapenem in biofilm forming Pseudomonas aeruginosa: Transcriptomic study from India. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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16
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Yadav S, Singh A, Bhattacharjee A, Khanna P, Manisha K. Role of point of care ultrasound to determine the correct position of the nasogastric tube in intubated COVID -19 patients. Trends Anaesth Crit Care 2020; 35:28-29. [PMID: 38620323 PMCID: PMC7455237 DOI: 10.1016/j.tacc.2020.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 08/25/2020] [Indexed: 11/19/2022]
Affiliation(s)
- Sangam Yadav
- Department of Anesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | - Abhishek Singh
- Department of Anesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | - Anirban Bhattacharjee
- Department of Anesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | - Puneet Khanna
- Department of Anesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | - Kalung Manisha
- Department of Anesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
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Agrawal S, Bhandari S, Bhattacharjee A, Deo A, Dixit NM, Harsha P, Juneja S, Kesarwani P, Swamy AK, Patil P, Rathod N, Saptharishi R, Shriram S, Srivastava P, Sundaresan R, Vaidhiyan NK, Yasodharan S. City-Scale Agent-Based Simulators for the Study of Non-pharmaceutical Interventions in the Context of the COVID-19 Epidemic: IISc-TIFR COVID-19 City-Scale Simulation Team. J Indian Inst Sci 2020; 100:809-847. [PMID: 33199946 PMCID: PMC7657713 DOI: 10.1007/s41745-020-00211-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Accepted: 10/19/2020] [Indexed: 12/17/2022]
Abstract
We highlight the usefulness of city-scale agent-based simulators in studying various non-pharmaceutical interventions to manage an evolving pandemic. We ground our studies in the context of the COVID-19 pandemic and demonstrate the power of the simulator via several exploratory case studies in two metropolises, Bengaluru and Mumbai. Such tools may in time become a common-place item in the tool kit of the administrative authorities of large cities.
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Bhattacharjee A, Chetri S, (Chanda) DD. Interplay of blaNDM-1 and acrA enhance transcriptional expression in carbapenem resistant Escherichia coli against concentration gradient carbapenem stress: A study from India. J Infect Public Health 2020. [DOI: 10.1016/j.jiph.2020.01.049] [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: 10/25/2022] Open
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19
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Choudhury N, Paul D, Das B, (Chanda) DD, Bhattacharjee A. Real time PCR based detection of broadhost range plasmids and their potential use as biomarker in detection of multidrug resistant gram negative bacteria. J Infect Public Health 2020. [DOI: 10.1016/j.jiph.2020.01.039] [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: 10/25/2022] Open
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20
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Wangkheimayum J, Bhattacharjee A, (Chanda) DD. Using endogenous methyltransferase genes as biomarker and kanamycin as signal molecule in detection of multidrug resistant Escherichia coli of clinical origin. J Infect Public Health 2020. [DOI: 10.1016/j.jiph.2020.01.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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21
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Pieri C, Bhattacharjee A, Barrozo A, Faure B, Giorgi M, Fize J, Réglier M, Field M, Orio M, Artero V, Hardré R. Hydrogen evolution reaction mediated by an all-sulfur trinuclear nickel complex. Chem Commun (Camb) 2020; 56:11106-11109. [DOI: 10.1039/d0cc04174b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A trinuclear nickel complex with S-based ligands is reported as a bio-inspired model of the [NiFe] hydrogenases' active site. DFT calculations indicate that thiolate and thioether functions are involved as proton relays in the H2 evolution mechanism.
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Affiliation(s)
- Cyril Pieri
- Aix Marseille Univ
- CNRS
- Centrale Marseille
- iSm2
- Marseille
| | | | | | - Bruno Faure
- Aix Marseille Univ
- CNRS
- Centrale Marseille
- iSm2
- Marseille
| | - Michel Giorgi
- Aix Marseille Univ
- CNRS
- Centrale Marseille
- Marseille
- France
| | - Jennifer Fize
- Univ. Grenoble Alpes
- CNRS
- CEA
- IRIG
- Laboratoire de Chimie et Biologie des Métaux
| | | | - Martin Field
- Univ. Grenoble Alpes
- CNRS
- CEA
- IRIG
- Laboratoire de Chimie et Biologie des Métaux
| | - Maylis Orio
- Aix Marseille Univ
- CNRS
- Centrale Marseille
- iSm2
- Marseille
| | - Vincent Artero
- Univ. Grenoble Alpes
- CNRS
- CEA
- IRIG
- Laboratoire de Chimie et Biologie des Métaux
| | - Renaud Hardré
- Aix Marseille Univ
- CNRS
- Centrale Marseille
- iSm2
- Marseille
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22
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Prabhash K, Patil V, Noronha V, Joshi A, Bhattacharjee A, Mathrudev V, Bhelekar A, Nawale K, Agarwal J, Ghosh-Laskar S, Budrukkar A, Mahajan A, Agarwal A, Purandare N, Chaturvedi P, Pai P, Chaukar D. Nimotuzumab-cisplatin-radiation versus cisplatin-radiation in HPV-negative oropharyngeal cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz252.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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23
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Schaeffer DB, Fox W, Follett RK, Fiksel G, Li CK, Matteucci J, Bhattacharjee A, Germaschewski K. Direct Observations of Particle Dynamics in Magnetized Collisionless Shock Precursors in Laser-Produced Plasmas. Phys Rev Lett 2019; 122:245001. [PMID: 31322368 DOI: 10.1103/physrevlett.122.245001] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 05/22/2019] [Indexed: 06/10/2023]
Abstract
We present the first laboratory observations of time-resolved electron and ion velocity distributions in magnetized collisionless shock precursors. Thomson scattering of a probe laser beam was used to observe the interaction of a laser-driven, supersonic piston plasma expanding through an ambient plasma in an external magnetic field. From the Thomson-scattered spectra we measure time-resolved profiles of electron density, temperature, and ion flow speed, as well as spatially resolved magnetic fields from proton radiography. We observe direct evidence of the coupling between piston and ambient plasmas, including the acceleration of ambient ions driven by magnetic and pressure gradient electric fields, and deformation of the piston ion flow, key steps in the formation of magnetized collisionless shocks. Even before a shock has fully formed, we observe strong density compressions and electron heating associated with the pileup of piston ions. The results demonstrate that laboratory experiments can probe particle velocity distributions relevant to collisionless shocks, and can complement, and in some cases overcome, the limitations of similar measurements undertaken by spacecraft missions.
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Affiliation(s)
- D B Schaeffer
- Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08540, USA
| | - W Fox
- Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08540, USA
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - R K Follett
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - G Fiksel
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - C K Li
- Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - J Matteucci
- Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08540, USA
| | - A Bhattacharjee
- Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08540, USA
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - K Germaschewski
- Space Science Center, University of New Hampshire, Durham, New Hampshire 03824, USA
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24
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Prasad R, Banerjee S, Kharshiing CE, Bhattacharjee A, Prasad SB. Rutin-mediated Apoptosis and Glutathione Changes in Ascites Daltons Lymphoma Cells: In silico Analysis of Rutin Interactions with Some Antiapoptotic and Glutathione-related Proteins. Indian J Pharm Sci 2019. [DOI: 10.36468/pharmaceutical-sciences.563] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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25
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Akhter N, Sultana Z, Bhattacharjee A. Genitourinary Fistula: A Curse to Neglected Pregnancy. Mymensingh Med J 2019; 28:206-213. [PMID: 30755571] [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: 06/09/2023]
Abstract
Genitourinary fistula is a psychophysiosocial distress that results in prolonged labour. Gradually, it has become a public health issue globally with advancing of its incidence day by day. A handsome number of mothers are also suffering in Bangladesh from genitourinary fistula. This study was done to observe the patterns of presentations of genitourinary fistula and their fetal outcome. One hundred sixteen (116) consecutive patients were enrolled in the study by purposive sampling as a diagnosed case of genitourinary fistula presented in Department of Obstetrics & Gynecology of Dhaka Medical College Hospital, Dhaka, Bangladesh from January 2017 to September 2017. It was a prospective observational cross-sectional study. A pre-structured, interview and observation based, peer reviewed data collection sheet was prepared. Data regarding sociodemographic, clinical and Obstetrical profile were recorded. Statistical analysis was done with SPSS version 23. Data were presented as mean and standard deviation, frequency and percentage with range. The mean age of the respondents was 27.27±4.21 (age range: 20-35 years). The mean height of the respondents was 150.26±13.28cm (range: 133-172cm). Among 106 mothers 69(65.1%) and 25(23.6%) were primiparous and multiparous respectively. On the contrary, 5(4.7%) each were grand multiparous and experienced fistula due to non obstetrics complications like malignancy, hysterectomy and radiotherapy. Mothers had 1, 2 and 3 fistulas in 98(92.5%), 6(5.7%) and 2(1.9%) respectively. Among 106 mothers, 99(93.4%) experienced only urinary incontinence whereas 5(4.7%) experienced fecal incontinence. Only 2(1.9%) experienced both urinary and fecal incontinence. Maximum vesicovaginal fistula was due to obstructed labour (65.09%) which was subsequently followed by trauma (14.15%). Vesicovaginal fistula was the commonest type which was subsequently followed by vesicocervical fistula. Among 106 mothers, 73(68.9%) and 25(23.6%) gave birth, still birth and alive babies respectively. On the contrary, 4(3.7%) neonate experienced death in neonatal period whereas 1(0.9%) each twin deliveries resulted in 'one dead and one alive' and 'Twin alive' respectively. In case of only 3(2.8%) mothers 'no information' regarding fetal outcome could be recorded. Prolonged labour is the principal culprit to develop genitourinary fistulas among which VVF is the commonest variety. Still birth is the frequently evident fetal outcome in case of this clinical disaster of pregnancy.
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Affiliation(s)
- N Akhter
- Dr Nasrin Akhter, Associate Professor, Department of Obstetrics & Gynecology, Dhaka Medical College, Dhaka, Bangladesh
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26
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Matteucci J, Fox W, Bhattacharjee A, Schaeffer DB, Moissard C, Germaschewski K, Fiksel G, Hu SX. Biermann-Battery-Mediated Magnetic Reconnection in 3D Colliding Plasmas. Phys Rev Lett 2018; 121:095001. [PMID: 30230875 DOI: 10.1103/physrevlett.121.095001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 06/29/2018] [Indexed: 06/08/2023]
Abstract
Recent experiments have demonstrated magnetic reconnection between colliding plasma plumes, where the reconnecting magnetic fields were self-generated in the plasma by the Biermann-battery effect. Using fully kinetic 3D simulations, we show the full evolution of the magnetic fields and plasma in these experiments, including self-consistent magnetic field generation about the expanding plume. The collision of the two plasmas drives the formation of a current sheet, where reconnection occurs in a strongly time- and space-dependent manner, demonstrating a new 3D reconnection mechanism. Specifically, we observe a fast, vertically localized Biermann-mediated reconnection, an inherently 3D process where the temperature profile in the current sheet coupled with the out-of-plane ablation density profile conspires to break inflowing field lines, reconnecting the field downstream. Fast reconnection is sustained by both the Biermann effect and the traceless electron pressure tensor, where the development of plasmoids appears to modulate the contribution of the latter. We present a simple and general formulation to consider the relevance of Biermann-mediated reconnection in general astrophysical scenarios.
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Affiliation(s)
- J Matteucci
- Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08540, USA
| | - W Fox
- Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08540, USA
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - A Bhattacharjee
- Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08540, USA
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - D B Schaeffer
- Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08540, USA
| | - C Moissard
- Laboratoire de Physique des Plasmas, École Polytechnique, Paris 75252, France
| | - K Germaschewski
- Space Science Center, University of New Hampshire, Durham, New Hampshire 03824, USA
| | - G Fiksel
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - S X Hu
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
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27
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Patil VM, Noronha V, Joshi A, Bhattacharjee A, Goel A, Talreja V, Chandrasekharan A, Pande N, Mandal T, Ramaswamy A, Prabhash K. Influence of Hypothyroidism After Chemoradiation on Outcomes in Head and Neck Cancer. Clin Oncol (R Coll Radiol) 2018; 30:675. [PMID: 30033049 DOI: 10.1016/j.clon.2018.07.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 07/05/2018] [Indexed: 11/28/2022]
Affiliation(s)
- V M Patil
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, India
| | - V Noronha
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, India
| | - A Joshi
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, India
| | - A Bhattacharjee
- Centre for Cancer Epidemiology, The Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Hospital, Mumbai, India
| | - A Goel
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, India
| | - V Talreja
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, India
| | - A Chandrasekharan
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, India
| | - N Pande
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, India
| | - T Mandal
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, India
| | - A Ramaswamy
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, India
| | - K Prabhash
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, India.
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28
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Joshi A, Bhattacharjee A, Noronha V, Patil VM, Karpe A, Kadam N, Solanki L, Prabhash K. Development and validation of a predictive score, for identifying poor eastern cooperative oncology group performance status (performance status 3-4) advanced nonsmall cell lung cancer patients who are likely to benefit from tyrosine kinase inhibitors. Indian J Cancer 2017; 54:127-131. [PMID: 29199675 DOI: 10.4103/ijc.ijc_162_17] [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: 11/04/2022]
Abstract
BACKGROUND One of the ten advanced lung cancer patients presents with poor eastern cooperative oncology group performance status (ECOG PS). There are no clear guidelines about management of these patients. The benefit of tyrosine kinase inhibitors (TKI) in this patient population remains questionable. Hence, in this study, we attempted to develop and validate a predictive score which would predict benefit from oral TKI. METHODS This was a prospective observational study done at Tata Memorial Hospital, India. Patients with nonsmall cell lung cancer with ECOG PS 3-4 were included in this study. All these patients had received oral TKI on compassionate grounds and were followed up till death. The overall survival (OS) was calculated from date of start of TKI to date of death. R software was used for development and validation of the predictive model. RESULTS The median survival duration of the discovery cohort and validation cohort were 170.5 and 115 days, respectively. The model predicted OS accurately, within ±2 months in 72.1% and within ±3 months in 81.7% of patients. CONCLUSION The current model can predict OS in poor PS patients treated with TKI within a satisfactory clinical range and can be used for decision-making of these patients.
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Affiliation(s)
- A Joshi
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - A Bhattacharjee
- Division of Clinical Research and Biostatistics, Malabar Cancer Centre, Kannur, Kerala, India
| | - V Noronha
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - V M Patil
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - A Karpe
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - N Kadam
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - L Solanki
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - K Prabhash
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, Maharashtra, India
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29
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Talreja V, Patil V, Joshi A, Noronha V, Chandrasekharan A, Dhumal S, Pande N, Turkar S, Shrirangwar S, Mahajan A, Juvrekar S, Bhattacharjee A, Prabhash K. Quality of life without toxicity or symptoms analysis of a randomized controlled clinical trial comparing efficacy of Cabazitaxel versus docetaxel in recurrent Head and Neck Cancer. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx665.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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30
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Barman A, Pradhan D, Bhattacharyya P, Dey S, Bhattacharjee A, Tesia SS, Mitra JK. Diagnostic accuracy of delirium assessment methods in critical care patients. J Crit Care 2017; 44:82-86. [PMID: 29073537 DOI: 10.1016/j.jcrc.2017.10.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 10/09/2017] [Accepted: 10/13/2017] [Indexed: 11/26/2022]
Abstract
PURPOSE Delirium is a disorder of decreased ability to focus, sustain or shift attention, change in cognition and or perception. The main objective was to evaluate the diagnostic accuracy of Confusion Assessment Method for the ICU (CAM-ICU) and Intensive Care Delirium Screening Checklist (ICDSC) among the nursing and medical staff in a multidisciplinary ICU. METHODS AND MATERIAL Three hundred ten verbally communicating and non-communicating patients (mean age in years 47.9, standard deviation [SD] 14.5, mean Acute Physiology and Chronic Health Evaluation II score 13.8, SD 6.4) were assessed by a psychiatrist, nurse and intensivist for delirium. Inter-rater agreement was measured by Cohen's kappa coefficient. Sensitivity, specificity, predictive values, likelihood ratios and diagnostic odds ratio (DOR) were calculated. RESULTS CAM-ICU showed higher sensitivity and DOR (84%, 86.1) compared to ICDSC (78%, 36.9). ICDSC had specificity and positive predictive value (94.5%, 92%) equal to that of CAM-ICU. For both the assessment methods (CAM-ICU and ICDSC), DORs for intensivists (120.5, 53.0) were relatively higher than nurses (67.0, 27.0). CONCLUSIONS In our mixed ICU population, CAM-ICU remained more sensitive than ICDSC. Though sensitivity and DOR were higher for medical staff, other diagnostic parameters were similar for both medical and nursing staff.
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Affiliation(s)
- Angkita Barman
- North Eastern Indira Gandhi Institute of Health and Medical Sciences, Shillong, Meghalaya, India
| | - Debasis Pradhan
- North Eastern Indira Gandhi Institute of Health and Medical Sciences, Shillong, Meghalaya, India.
| | - Prithwis Bhattacharyya
- North Eastern Indira Gandhi Institute of Health and Medical Sciences, Shillong, Meghalaya, India.
| | - Samarjit Dey
- North Eastern Indira Gandhi Institute of Health and Medical Sciences, Shillong, Meghalaya, India
| | - Anirban Bhattacharjee
- North Eastern Indira Gandhi Institute of Health and Medical Sciences, Shillong, Meghalaya, India
| | - Sonali Shinde Tesia
- North Eastern Indira Gandhi Institute of Health and Medical Sciences, Shillong, Meghalaya, India
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31
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Schaeffer DB, Fox W, Haberberger D, Fiksel G, Bhattacharjee A, Barnak DH, Hu SX, Germaschewski K. Generation and Evolution of High-Mach-Number Laser-Driven Magnetized Collisionless Shocks in the Laboratory. Phys Rev Lett 2017; 119:025001. [PMID: 28753335 DOI: 10.1103/physrevlett.119.025001] [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] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Indexed: 06/07/2023]
Abstract
We present the first laboratory generation of high-Mach-number magnetized collisionless shocks created through the interaction of an expanding laser-driven plasma with a magnetized ambient plasma. Time-resolved, two-dimensional imaging of plasma density and magnetic fields shows the formation and evolution of a supercritical shock propagating at magnetosonic Mach number M_{ms}≈12. Particle-in-cell simulations constrained by experimental data further detail the shock formation and separate dynamics of the multi-ion-species ambient plasma. The results show that the shocks form on time scales as fast as one gyroperiod, aided by the efficient coupling of energy, and the generation of a magnetic barrier between the piston and ambient ions. The development of this experimental platform complements present remote sensing and spacecraft observations, and opens the way for controlled laboratory investigations of high-Mach number collisionless shocks, including the mechanisms and efficiency of particle acceleration.
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Affiliation(s)
- D B Schaeffer
- Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08540, USA
| | - W Fox
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - D Haberberger
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - G Fiksel
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - A Bhattacharjee
- Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08540, USA
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - D H Barnak
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
- Fusion Science Center for Extreme States of Matter, University of Rochester, Rochester, New York 14623, USA
| | - S X Hu
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - K Germaschewski
- Space Science Center, University of New Hampshire, Durham, New Hampshire 03824, USA
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32
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Dessai SB, Chakraborty S, Babu T, Nayanar S, Bhattacharjee A, Jones J, Balasubramanian S, Patil VM. Tolerance of weekly paclitaxel and carboplatin as neoadjuvant chemotherapy in advanced ovarian cancer patients who are unlikely to tolerate 3 weekly paclitaxel and carboplatin. Indian J Cancer 2017; 53:280-283. [PMID: 28071627 DOI: 10.4103/0019-509x.197742] [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: 11/04/2022]
Abstract
OBJECTIVE There are little data regarding safety and effectiveness of neoadjuvant chemotherapy (NACT) in patients who are considered unfit for receiving 3 weekly paclitaxel and carboplatin. The aim of this study was to study the toxicity and response rates of weekly paclitaxel and carboplatin as NACT in such cohort of patients. METHODS Study population included advanced ovarian cancer patients who were unlikely to tolerate 3 weekly paclitaxel and carboplatin and hence received weekly paclitaxel (80 mg/m2) and carboplatin AUC-2 as NACT. The data regarding the baseline characteristics, chemotherapy tolerance, completion rates, toxicity (CTCAE version 4.02), and radiological response rates are presented. SPSS version 16 was used for analysis. Descriptive statistics is presented. RESULT Eleven patients received this schedule. Nine patients completed nine cycles of NACT. Except one, all patients completed NACT with an average relative dose intensity of >0.8. There was no chemotherapy-related mortality. Grade 3-4 life-threatening complications were seen in two patients. The post NACT response rate was 100%. CONCLUSION Weekly paclitaxel and carboplatin chemotherapy is safe and efficacious in patients who are unsuitable for 3 weekly paclitaxel and carboplatin chemotherapy schedules.
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Affiliation(s)
- S B Dessai
- Department of Surgical Oncology, Malabar Cancer Center, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - S Chakraborty
- Department of Radiation Oncology, Malabar Cancer Center, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - Tvs Babu
- Department of Cancer Imaging, Malabar Cancer Center, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - S Nayanar
- Department of Oncopathology and Translational Medicine, Malabar Cancer Center, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - A Bhattacharjee
- Department of Division of Clinical Research and Biostatistics, Malabar Cancer Center, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - J Jones
- Department of Radiation Oncology, Malabar Cancer Center, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - S Balasubramanian
- Department of Surgical Oncology, Malabar Cancer Center, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - V M Patil
- Department of Clinical Hematology and Medical Oncology, Malabar Cancer Center, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
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33
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Dessai SB, Patil VM, Chakraborty S, Babu S, Bhattacharjee A, Nayanar S, Vikram S, Balasubramanian S. An audit of cytoreductive surgeries in ovarian cancer from a rural based cancer center. Indian J Cancer 2017; 53:284-287. [PMID: 28071628 DOI: 10.4103/0019-509x.197743] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND AND OBJECTIVE Ovarian cancers are frequently seen at an advanced stage in our center. This audit was planned to see the morbidity and efficacy of different types of cytoreductive surgeries (radical vs. ultra-radical) done in such patients. METHODS This was a retrospective analysis of all ovarian cancer patients who underwent cytoreductive surgery at our center from January 2009 to August 2013. The case records of these patients were reviewed and the demographic, disease-related and treatment-related data were extracted. RESULTS Fifty-fivepatients were identified. Ten (18.2%) patients underwent primary cytoreduction while 45 patients had (81.8%) interval cytoreduction. The resections achieved were optimal in 50 patients (90.9%) and suboptimal in five patients (9.1%). The postoperative median blood loss was 400 (350-600) mL. The median time interval for surgery was 4.0 h (3-5 h). The type of resection achieved (optimal vs. suboptimal) was the only factor affecting the progression free survival (PFS) (Hazard ratio = 0.08 95% confidence interval 0.02-0.3). There was no significant difference in postoperative morbidity in patients undergoing the ultra-radical surgery as compared to those who underwent radical surgery. CONCLUSION Optimal cytoreduction may improve PFS in advanced ovarian cancer patients and needs to be done even if it mandates an ultra-radical surgery.
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Affiliation(s)
- S B Dessai
- Department of Surgical Oncology, Malabar Cancer Centre, Thalassery, Kerala, India
| | - V M Patil
- Department of Clinical Hematology and Medical Oncology, Malabar Cancer Centre, Thalassery, Kerala, India
| | - S Chakraborty
- Department of Radiation Oncology, Malabar Cancer Centre, Thalassery, Kerala, India
| | - S Babu
- Department of Imageology, Malabar Cancer Centre, Thalassery, Kerala, India
| | - A Bhattacharjee
- Department of Cancer Registry, Division of Clinical Research and Biostatistics, Malabar Cancer Centre, Thalassery, Kerala, India
| | - S Nayanar
- Department of Clinical Laboratory Services and Translational Research, Division of Oncopathology, Malabar Cancer Centre, Thalassery, Kerala, India
| | - S Vikram
- Department of Surgical Oncology, Malabar Cancer Centre, Thalassery, Kerala, India
| | - S Balasubramanian
- Department of Surgical Oncology, Malabar Cancer Centre, Thalassery, Kerala, India
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34
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Patil VM, Chakraborty S, Jithin TK, Dessai S, Sajith Babu TP, Raghavan V, Geetha M, Kumar TS, Biji MS, Bhattacharjee A, Nair C. Development and validation of a questionnaire to measure preferences and expectations of patients undergoing palliative chemotherapy: EXPECT questionnaire. Indian J Cancer 2017; 53:339-344. [PMID: 28071643 DOI: 10.4103/0019-509x.197735] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE The objective was to design and validate the questionnaire for capturing palliative chemotherapy-related preferences and expectations. DESIGN Single arm, unicentric, prospective observational study. METHODS EXPECT questionnaire was designed to capture preferences and expectations of patients undergoing palliative chemotherapy. This questionnaire underwent a linguistic validation and then was tested in patients. Ten patients are undergoing chemotherapy for solid tumors who fulfilled the inclusion and exclusion criteria self-administered the EXPECT questionnaire in regional language. After filling this questionnaire, they self-administered quick questionnaire-10 (QQ-10). SPSS version 16 (IBM New York) was used for analysis. Completion rate of EXPECT questionnaire was calculated. The feasibility, face validity, utility and time taken for completion of EXPECT questionnaire was also assessed. RESULTS The completion rate of this questionnaire was 100%. All patients completed questionnaire within 5 min. The QQ-10 tool confirmed the feasibility, face validity and utility of the questionnaire. CONCLUSION EXPECT questionnaire was validated in the regional language, and it's an effective tool for capturing patient's preferences and expectation from chemotherapy.
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Affiliation(s)
- V M Patil
- Department of Clinical Hematology and Medical Oncology, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - S Chakraborty
- Department of Radiation Oncology, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - T K Jithin
- Department of Clinical Hematology and Medical Oncology, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - S Dessai
- Department of Surgical Oncology, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - T P Sajith Babu
- Department of Surgical Oncology, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - V Raghavan
- Department of Clinical Hematology and Medical Oncology, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - M Geetha
- Department of Radiation Oncology, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - T Shiva Kumar
- Department of Surgical Oncology, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - M S Biji
- Department of Cancer Palliative Medicine, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - A Bhattacharjee
- Department of Division of Clinical Research and Biostatistics, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - C Nair
- Department of Clinical Hematology and Medical Oncology, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
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Prabhash K, Patil VM, Noronha V, Joshi A, Nayak L, Pande N, Chandrashekharan A, Dhumal S, Bhattacharjee A, Banavali S. Retrospective analysis of palliative metronomic chemotherapy in head and neck cancer. Indian J Cancer 2017; 54:25-29. [DOI: 10.4103/ijc.ijc_161_17] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Bhattacharjee A, Pradhan D, Bhattacharyya P, Dey S, Chhunthang D, Handique A, Barman A, Yunus M. How Useful is Extravascular Lung Water Measurement in Managing Lung Injury in Intensive Care Unit? Indian J Crit Care Med 2017; 21:494-499. [PMID: 28904478 PMCID: PMC5588483 DOI: 10.4103/ijccm.ijccm_40_17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Context: The primary goal of septic shock management is optimization of organ perfusion, often at the risk of overloading the interstitium and causing pulmonary edema. The conventionally used end points of resuscitation do not generally include volumetric parameters such as extravascular lung water index (EVLWI) and pulmonary vascular permeability index (PVPI). Aims: This study aimed to assess the prognostic value of EVLWI and PVPI by calculating their correlation with the severity of lung injury. Settings and Design: This prospective observational study included twenty mechanically ventilated critically ill patients with Acute Physiology and Chronic Health Evaluation score (APACHE II) >20. Subjects and Methods: EVLWI and PVPI were measured using transpulmonary thermodilution, and simultaneously, PaO2:FiO2 ratio, alveolar-arterial gradient of oxygen (AaDO2), and chest radiograph scores from two radiologists were obtained. Statistical Analysis: The correlation of EVLWI and PVPI with chest radiograph scores, PaO2:FiO2 ratio, and AaDO2 were calculated. The inter-observer agreement between the two radiologists was tested using kappa test. Results: EVLWI and PVPI correlated modestly with PaO2:FiO2 (r = −0.32, P = 0.0004; r = −0.39, P = 0.0001). There was a better correlation of EVLWI and PVPI with PaO2:FiO2 ratio (r = −0.71, P < 0.0001; r = −0.58, P = 0.0001) in the acute respiratory distress syndrome (ARDS) subgroup. The EVLWI values correlated significantly with corresponding chest radiograph scores (r = 0.71, P < 0.0001 for observer 1 and r = 0.68, P < 0.0001 for observer 2). Conclusions: EVLWI and PVPI may have a prognostic significance in the assessment of lung injury in septic shock patients with ARDS. Further research is required to reveal the usefulness of EVLWI as an end point of fluid resuscitation in the management of septic shock with ARDS.
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Affiliation(s)
- Anirban Bhattacharjee
- Department of Anaesthesiology and Critical Care, NEIGRIHMS, Shillong, Meghalaya, India
| | - Debasis Pradhan
- Department of Anaesthesiology and Critical Care, NEIGRIHMS, Shillong, Meghalaya, India
| | | | - Samarjit Dey
- Department of Anaesthesiology and Critical Care, NEIGRIHMS, Shillong, Meghalaya, India
| | - Daniala Chhunthang
- Department of Radiology and Imaging, NEIGRIHMS, Shillong, Meghalaya, India
| | - Akash Handique
- Department of Radiology and Imaging, NEIGRIHMS, Shillong, Meghalaya, India
| | - Angkita Barman
- Department of Anaesthesiology and Critical Care, NEIGRIHMS, Shillong, Meghalaya, India
| | - Mohd Yunus
- Department of Anaesthesiology and Critical Care, NEIGRIHMS, Shillong, Meghalaya, India
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Prabhash K, Patil VM, Noronha V, Joshi A, Agarwala V, Muddu V, Ramaswamy A, Chandrasekharan A, Dhumal S, Juvekar S, Arya A, Bhattacharjee A. Comparison of paclitaxel-cetuximab chemotherapy versus metronomic chemotherapy consisting of methotrexate and celecoxib as palliative chemotherapy in head and neck cancers. Indian J Cancer 2017; 54:20-24. [DOI: 10.4103/ijc.ijc_160_17] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Kane S, Patil VM, Noronha V, Joshi A, Dhumal S, D'Cruz A, Bhattacharjee A, Prabhash K. Predictivity of human papillomavirus positivity in advanced oral cancer. Indian J Cancer 2016; 52:403-5. [PMID: 26905153 DOI: 10.4103/0019-509x.176694] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND AND OBJECTIVE Human papillomavirus (HPV) is a known prognostic factor world over in patients of carcinoma oropharynx. The role of HPV in oral cancers has not been investigated adequately. We tried to identify standard clinicopathological features in oral cancer, which would predict HPV-positivity. METHODS This was a retrospective analysis of 124 cases of T4 oral cancer patients at our center. HPV-positive was defined in accordance with positive p16 immunohistochemistry done on pretreatment local tumor site biopsy. Age, sex, habits (smoking history and oral tobacco), Eastern Cooperative Oncology Group performance status (ECOG PS), T stage, N stage, grade, and site were selected, for testing of prediction for HPV-positivity. The analysis was performed by R studio version 3.1.1. Two-sample test for equality of proportions with continuity correction was used to identify factors predicting for HPV-positivity. P = 0.05 was considered as significant. RESULTS Of 124 patients, 16 patients (12.9%) were HPV-positive. The median age of the whole cohort was 43 years (interquartile range 37-52 years) with 15 females (12.1%). All had squamous cell carcinoma (100%). The grade of the tumor was well differentiated in 9 patients (7.2%), moderately differentiated in 98 patients (79.1%), and poorly differentiated in 17 patients (13.7%). The ECOG PS 0 in 19 patients (15.3%), 1 in 104 patients (83.9%), and 2 in 1 patient (0.8%). The subsite of the tumor was buccal mucosa in 74 patients (59.7%), anterior two-third of tongue in 33 patients (26.6%), and others in 17 patients (13.7%). None of the tested factors except the use of oral tobacco were statistically significantly associated with HPV-positivity. History of tobacco usage had a statistical trend toward ability to predict HPV-positivity. The proportion of patients with HPV-positive oral cancer in patients without history usage of oral tobacco was 31.3% while it was 10.2% in patients with previous history of tobacco use (P = 0.03). CONCLUSION Standard clinicopathological variables could not predict for HPV-positivity. Negative history of tobacco (smokeless) usage showed statistical trends toward ability to predict HPV-positivity in oral cancer patients.
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Affiliation(s)
| | - V M Patil
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, Maharashtra, India
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Thiagarajan S, Babu TPS, Chakraborthy S, Patil VM, Bhattacharjee A, Balasubramanian S. Head and neck cancer in geriatric patients: Analysis of the pattern of care given at a tertiary cancer care center. Indian J Cancer 2016; 52:387-90. [PMID: 26905147 DOI: 10.4103/0019-509x.176734] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND AND AIM The percentage of elderly people with head and neck cancers (HNC) is on the rise. This makes HNC in this group of patients an important issue for healthcare providers. The present study was planned to analyze the patterns of care given to the geriatric patients and to identify the factors influencing the decision making process. MATERIALS AND METHODS Data of all the elderly patients (≥65 years) registered in the year 2012, with histologically proven HNC (all sites, stages, histopathological types, except lymphoma, sarcoma and cervical metastasis of unknown origin) receiving treatment (definitive/palliative) were collected. RESULTS A total of 270 patients were included in this study. The median age was 72 years (range: 65-101), with predominant male population (70%, n = 190). Oral cavity squamous cell carcinoma (SCC) was the most common cancer (57%, n = 154). Eastern Co-Operative Oncology Group performance status (PS) of 0-2 was seen in 91% of the patients. Co-morbidities were present in 139 (51.5%) patients. 50% (n = 134) of the patients received palliative intent treatment, 45% (n = 123) definitive treatment, whereas in 5% (n = 13) the intent was not mentioned. Age, a clinical stage and PS significantly influenced the decision making on the intent of treatment. 208 (77%) patients completed their treatment irrespective of the intent. Age was the only factor influencing treatment completion irrespective of the intent. CONCLUSION Geriatric HNC patients frequently present with advanced disease, having multiple co-morbidities. Hence, a multidisciplinary team management of these patients is essential, also taking into account of the social and financial support available to these patients.
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Affiliation(s)
- S Thiagarajan
- Department of Surgical Oncology, Malabar Cancer Centre, Thalassery, Kannur, Kerala, India
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Patil V, Joshi A, Noronha V, Deodhar J, Bhattacharjee A, Dhumal S, M V C, Karpe A, Talreja V, Chandrasekharan A, Turkar S, Prabhash K. 386P Expectations and preferences for palliative chemotherapy in head and neck cancers patients. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw587.028] [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: 11/14/2022] Open
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Patil V, Joshi A, Noronha V, Deodhar J, Bhattacharjee A, Dhumal S, Mv C, Karpe A, Talreja V, Chandrasekharan A, Turkar S, Prabhash K. 386P Expectations and preferences for palliative chemotherapy in head and neck cancers patients. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00544-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Noronha V, Patil V, Joshi A, Muddu V, Bhattacharjee A, Juvekar S, Arya S, Chaturvedi P, Chaukar D, Pai PS, Dcruz AK, Prabhash K. Is taxane/platinum/5 fluorouracil superior to taxane/platinum alone and does docetaxel trump paclitaxel in induction therapy for locally advanced oral cavity cancers? Indian J Cancer 2016; 52:70-3. [PMID: 26837979 DOI: 10.4103/0019-509x.175604] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Cisplatin and 5 fluorouracil drug combination is inferior to the combination of taxane with these 2 drugs. However, often in clinical practice at our center giving TPF (docetaxel, cisplatin, 5 fluorouracil) is difficult in view of logistics and tolerance issues. In such a scenario, we prefer to use the 2 drugs combination of platinum and taxane. However, no study has addressed whether a 2 drugs combination, which includes taxane is inferior to the 3 drugs combination and which the taxane of choice is in the 2 drugs combination of taxane and platinum. METHODS This is a retrospective analysis of prospectively collected data of patients undergoing induction chemotherapy (IC) in oral cavity cancers from 2010 to 2012. We chose for analysis those patients who had a baseline scan done within 4 weeks of starting therapy and a follow-up scan done within 2 weeks of completion of the second cycle of IC. Response was scored in accordance with RECIST version 1.1. Chi-square analysis was done to compare response rates (RRs) between regimens. RESULTS Two hundred and forty-five patients were identified. The median age was 45 years (24-70 years), 208 (84.9%) were male patients, and 154 patients (62.9%) had primary in the Buccal mucosa. The regimens received were TPF 22 (9%), docetaxel + cisplatin 97 (39.6%), paclitaxel + cisplatin 89 (36.3%), docetaxel + carboplatin 16 (6.5%) and paclitaxel + carboplatin 21 (8.6%). The overall RRs were complete response, partial response, stable disease and progressive disease in 4 (1.6%), 56 (22.9%), 145 (59.2%) and 40 (16.3%). The 3 drugs regimen (TPF) had 50% RR as compared to 22% RR with 2 drugs regimen (P = 0.004). Docetaxel containing regimens had 30.3% RR as compared to 17.2% RR with paclitaxel containing regimens (P = 0.094). CONCLUSIONS TPF has better RR than a 2 drugs taxane-containing regimen and docetaxel leads to a better RR than paclitaxel for IC in locally advanced oral cavity cancers.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - K Prabhash
- Department of Medical Oncology, Surgical Oncology, Tata Memorial Centre, Mumbai, Maharashtra, India
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Opal S, Horn D, Palardy J, Parejo N, Jhung J, Bhattacharjee A, Young L. The in vivo significance of antibiotic-induced endotoxin release in experimental Gram-negative sepsis. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/096805199600300310] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Considerable evidence now supports the experimental findings that penicillin-binding protein (PBP)-2 specific antimicrobial agents such as imipenem generate less endotoxin than PBP-3 specific agents such as ceftazidime during the process of bacteriolysis of Gram-negative bacteria. To determine if differences in endotoxin release have pathophysiologic significance in vivo, Sprague-Dawley rats were experimentally challenged with intraperitoneal injections of virulent, serum-resistant clinical strains of the following Gram-negative bacilli: Escherichia coli 018:K1, Klebsiella pneumoniae K2, and Pseudomonas aeruginosa 12.4.4 (immuno type 6). After intravenous administration of imipenem (25 mg/kg), ceftazidime (50 mg/kg) or saline control, imipenem and ceftazidime-treated animals had rapid reductions in the quantitative level of bacteremia from all three pathogens. Peritoneal fluid samples revealed spherical forms with imipenem and long, filamentous forms with ceftazidime. Circulating plasma endotoxin levels were consistently higher ( P < 0.05) with ceftazidime than imipenem for 6 h after administration of E. coli or P. aeruginosa intraperitoneal challenge. Endotoxin levels were unchanged to slightly higher with imipenem than ceftazidime following K. pneumoniae intraperitoneal challenge. TNF levels peaked 2 h post-therapy and were consistently higher with ceftazidime-treated animals ( P < 0.05). D-galactosamine-treated animals had LD50 values that were 0.5-2 log higher ( P < 0.001) with imipenem for E. coli and P. aeruginosa but did not differ from ceftazidime in animals challenged with the K. pneumoniae strain. These results indicate that the PBP-2 specific agent imipenem led to significantly less endotoxin release than did ceftazidime with its great affinity to PBP-3. Differential endotoxin release was found after antimicrobial therapy with the E. coli and P. aeruginosa strains but not with the K. pneumoniae strain tested in this study. The clinical relevance of these findings with treatment of systemic Gram-negative infections in humans will require further clinical investigation.
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Affiliation(s)
- S.M. Opal
- Divisions of infectious Diseases and Pathology, Brown University School of Medicine, and Memorial Hospital of Rhode Island, USA, Merck US Human Health Division, West Point, Pennsylvania, USA, Walter Reed Army Institute of Research, Washington DC, USA
| | - D.L. Horn
- Divisions of infectious Diseases and Pathology, Brown University School of Medicine, and Memorial Hospital of Rhode Island, USA, Merck US Human Health Division, West Point, Pennsylvania, USA, Walter Reed Army Institute of Research, Washington DC, USA
| | - J.E. Palardy
- Divisions of infectious Diseases and Pathology, Brown University School of Medicine, and Memorial Hospital of Rhode Island, USA, Merck US Human Health Division, West Point, Pennsylvania, USA, Walter Reed Army Institute of Research, Washington DC, USA
| | - N. Parejo
- Divisions of infectious Diseases and Pathology, Brown University School of Medicine, and Memorial Hospital of Rhode Island, USA, Merck US Human Health Division, West Point, Pennsylvania, USA, Walter Reed Army Institute of Research, Washington DC, USA
| | - J. Jhung
- Divisions of infectious Diseases and Pathology, Brown University School of Medicine, and Memorial Hospital of Rhode Island, USA, Merck US Human Health Division, West Point, Pennsylvania, USA, Walter Reed Army Institute of Research, Washington DC, USA
| | - A. Bhattacharjee
- Divisions of infectious Diseases and Pathology, Brown University School of Medicine, and Memorial Hospital of Rhode Island, USA, Merck US Human Health Division, West Point, Pennsylvania, USA, Walter Reed Army Institute of Research, Washington DC, USA
| | - L.D. Young
- Divisions of infectious Diseases and Pathology, Brown University School of Medicine, and Memorial Hospital of Rhode Island, USA, Merck US Human Health Division, West Point, Pennsylvania, USA, Walter Reed Army Institute of Research, Washington DC, USA
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Jaiser S, Müller M, Bauer W, Bhattacharjee A, Scharfer P, Schabel W. Der Verfestigungsmechanismus von Lithium-Ionen-Batterieelektroden während der Trocknung. CHEM-ING-TECH 2016. [DOI: 10.1002/cite.201650435] [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: 11/08/2022]
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Martins G, Moondra A, Dubey A, Bhattacharjee A, Koutsoukos XD. Computation and Communication Evaluation of an Authentication Mechanism for Time-Triggered Networked Control Systems. Sensors (Basel) 2016; 16:s16081166. [PMID: 27463718 PMCID: PMC5017332 DOI: 10.3390/s16081166] [Citation(s) in RCA: 4] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 07/12/2016] [Accepted: 07/15/2016] [Indexed: 11/16/2022]
Abstract
In modern networked control applications, confidentiality and integrity are important features to address in order to prevent against attacks. Moreover, network control systems are a fundamental part of the communication components of current cyber-physical systems (e.g., automotive communications). Many networked control systems employ Time-Triggered (TT) architectures that provide mechanisms enabling the exchange of precise and synchronous messages. TT systems have computation and communication constraints, and with the aim to enable secure communications in the network, it is important to evaluate the computational and communication overhead of implementing secure communication mechanisms. This paper presents a comprehensive analysis and evaluation of the effects of adding a Hash-based Message Authentication (HMAC) to TT networked control systems. The contributions of the paper include (1) the analysis and experimental validation of the communication overhead, as well as a scalability analysis that utilizes the experimental result for both wired and wireless platforms and (2) an experimental evaluation of the computational overhead of HMAC based on a kernel-level Linux implementation. An automotive application is used as an example, and the results show that it is feasible to implement a secure communication mechanism without interfering with the existing automotive controller execution times. The methods and results of the paper can be used for evaluating the performance impact of security mechanisms and, thus, for the design of secure wired and wireless TT networked control systems.
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Affiliation(s)
- Goncalo Martins
- Department of Electrical and Computer Engineering, University of Denver, Denver, CO 80208, USA.
| | - Arul Moondra
- Institute for Software Integrated Systems (ISIS), Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, TN 37212, USA.
| | - Abhishek Dubey
- Institute for Software Integrated Systems (ISIS), Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, TN 37212, USA.
| | - Anirban Bhattacharjee
- Institute for Software Integrated Systems (ISIS), Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, TN 37212, USA.
| | - Xenofon D Koutsoukos
- Institute for Software Integrated Systems (ISIS), Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, TN 37212, USA.
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Singha P, Chanda DD, Maurya AP, Paul D, Chakravarty A, Bhattacharjee A. Distribution of Class II integrons and their contribution to antibiotic resistance within Enterobacteriaceae family in India. Indian J Med Microbiol 2016; 34:303-7. [DOI: 10.4103/0255-0857.188319] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Dessai SB, Chakraborty S, Babu TVS, Nayanar S, Bhattacharjee A, Jones J, Balasubramanian S, Patil VM. Tolerance of weekly metronomic paclitaxel and carboplatin as neoadjuvant chemotherapy in advanced ovarian cancer patients who are unlikely to tolerate 3 weekly paclitaxel and carboplatin. South Asian J Cancer 2016; 5:63-6. [PMID: 27275450 PMCID: PMC4873699 DOI: 10.4103/2278-330x.181629] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVE There are little data regarding safety and effectiveness of neoadjuvant chemotherapy (NACT) in patients who are considered unfit for receiving 3 weekly paclitaxel and carboplatin. The aim of this study was to examine the toxicity and response rates of weekly paclitaxel and carboplatin as NACT in such cohort of patients. METHODS Study population included advanced ovarian cancer patients who were unlikely to tolerate 3 weekly paclitaxel and carboplatin and hence received weekly paclitaxel (80 mg/m(2)) and carboplatin AUC-2 as NACT. The data regarding the baseline characteristics, chemotherapy tolerance, completion rates, toxicity (Common Terminology Criteria for Adverse Events version 4.02), and radiological response rates are presented. SPSS version 16 was used for analysis. Descriptive statistics is presented. RESULTS Eleven patients received this schedule. Nine patients completed nine cycles of NACT. Except one, all patients completed NACT with an average relative dose intensity of >0.8. There was no chemotherapy-related mortality. Grade 3-4 life-threatening complications were seen in two patients. The post NACT response rate was 100%. CONCLUSIONS Weekly paclitaxel and carboplatin chemotherapy is safe and efficacious in patients who are unsuitable for 3 weekly paclitaxel and carboplatin chemotherapy schedules.
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Affiliation(s)
- S B Dessai
- Department of Surgical Oncology, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - S Chakraborty
- Department of Radiation Oncology, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - T V S Babu
- Department of Cancer Imaging, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - S Nayanar
- Department of Oncopathology and Translational Medicine, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - A Bhattacharjee
- Division of Clinical Research and Biostatistics, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - J Jones
- Department of Radiation Oncology, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - S Balasubramanian
- Department of Surgical Oncology, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
| | - Vijay M Patil
- Clinical Hematology and Medical Oncology, Malabar Cancer Center, Moozhikkara, Kodiyeri, Thalassery, Kannur, Kerala, India
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Gurung AB, Ali MA, Bhattacharjee A, AbulFarah M, Al-Hemaid F, Abou-Tarboush FM, Al-Anazi KM, Al-Anazi FSM, Lee J. Molecular docking of the anticancer bioactive compound proceraside with macromolecules involved in the cell cycle and DNA replication. Genet Mol Res 2016; 15:gmr7829. [PMID: 27173346 DOI: 10.4238/gmr.15027829] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The bioactive compounds proceraside A, frugoside and calotropin, which were extracted from the root bark of Calotropis procera (Aiton) W.T. Aiton (family Asclepiadaceae), were recently reported to inhibit the growth of inhibition against various human cancer cell lines in vitro. However, their modes of action have not been clearly defined. Therefore, we attempted an in silico approach to gain insights into their binding modes against the following selected molecular targets: CDK-2, CDK-6, topoisomerase I, BCL-2, VEGFR-2, telomere: G-quadruplex, and topoisomerase II. These targets were selected based on their key roles in cancer progression via the regulation of the cell cycle and DNA replication. Molecular-docking analyses revealed that proceraside A was the best docked ligand against all the targets, with the exception of telomere-G: quadruplex. Furthermore, it displayed the lowest binding energies and inhibition constants, and critical hydrogen bonds and hydrophobic interactions with the targets were also revealed. The present study may aid in the identification of possible targets for proceraside A, and might provide a plausible explanation for its proven anti-tumor activities. Moreover, the result of this study may further guide structure-activity relationship studies used to generate more potent target-specific inhibitors.
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Affiliation(s)
- A B Gurung
- Department of Biotechnology and Bioinformatics, North Eastern Hill University, Shillong, Meghalaya, India
| | - M A Ali
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - A Bhattacharjee
- Department of Biotechnology and Bioinformatics, North Eastern Hill University, Shillong, Meghalaya, India
| | - M AbulFarah
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - F Al-Hemaid
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - F M Abou-Tarboush
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - K M Al-Anazi
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - F S M Al-Anazi
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - J Lee
- Department of Environment and Forest Resources, Chungnam National University, Yuseong-gu, Daejeon, Republic of Korea
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Maurya A, Dhar (Chanda) D, Chakravarty A, Bhattacharjee A. Carriage of multiple gene cassettes mediated extended spectrum cephalosporinase within diverse incompatibility (Inc) plasmid groups among gram negative rods in a tertiary referral hospital of India. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Paul D, Dhar D, Bhattacharjee A. Concentration dependent carbapenem exposure alters the plasmid copy number within nosocomial isolates of Escherichia coli harboring blaNDM-1: A study from Northeast India. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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