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Rosenzweig A, Spotton K, Bhattacharjee A, Morales-Amador A, Brady SF. Identification of an Optimized Clinical Development Candidate from Cilagicin, an Antibiotic That Evades Resistance by Dual Polyprenyl Phosphate Binding. ACS Infect Dis 2024; 10:1536-1544. [PMID: 38626307 DOI: 10.1021/acsinfecdis.4c00018] [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] [Indexed: 04/18/2024]
Abstract
Cilagicin is a dual polyprenyl phosphate binding lipodepsipeptide antibiotic with strong activity against clinically relevant Gram-positive pathogens while evading antibiotic resistance. Cilagicin showed high serum binding that reduced its in vivo efficacy. Cilagicin-BP, which contains a biphenyl moiety in place of the N-terminal myristic acid found on cilagicin, showed reduced serum binding and increased in vivo efficacy but decreased potency against some pathogens. Here, we manipulated the acyl tail and the peptide core of cilagicin to identify an optimized collection of structural features that maintain potent antibiotic activity against a wide range of pathogens in the presence of serum. This led to the identification of the optimized antibiotic dodecacilagicin, which contains an N-terminal dodecanoic acid. Dodecacilagicin exhibits low MICs against clinically relevant pathogens in the presence of serum, retains polyprenyl phosphate binding, and evades resistance development even after long-term antibiotic exposure, making dodecacilagicin an appealing candidate for further therapeutic development.
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Affiliation(s)
- Adam Rosenzweig
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, New York 10065, United States
- Tri-Institutional PhD Program in Chemical Biology, The Rockefeller University, New York, New York 10065, United States
| | - Kaylyn Spotton
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, New York 10065, United States
- Tri-Institutional PhD Program in Chemical Biology, The Rockefeller University, New York, New York 10065, United States
| | - Abir Bhattacharjee
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, New York 10065, United States
| | - Adrián Morales-Amador
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, New York 10065, United States
| | - Sean F Brady
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, New York 10065, United States
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2
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Wang Z, Kasper A, Takahashi M, Amador AM, Bhattacharjee A, Kan J, Hernandez Y, Ternei M, Brady SF. Tapcin, an In Vivo Active Dual Topoisomerase I/II Inhibitor Discovered by Synthetic Bioinformatic Natural Product (Syn-BNP)-Coupled Metagenomics. Angew Chem Int Ed Engl 2024; 63:e202317187. [PMID: 38231130 PMCID: PMC11018531 DOI: 10.1002/anie.202317187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 01/10/2024] [Accepted: 01/16/2024] [Indexed: 01/18/2024]
Abstract
DNA topoisomerases are attractive targets for anticancer agents. Dual topoisomerase I/II inhibitors are particularly appealing due to their reduced rates of resistance. A number of therapeutically relevant topoisomerase inhibitors are bacterial natural products. Mining the untapped chemical diversity encoded by soil microbiomes presents an opportunity to identify additional natural topoisomerase inhibitors. Here we couple metagenome mining, bioinformatic structure prediction algorithms, and chemical synthesis to produce the dual topoisomerase inhibitor tapcin. Tapcin is a mixed p-aminobenzoic acid (PABA)-thiazole with a rare tri-thiazole substructure and picomolar antiproliferative activity. Tapcin reduced colorectal adenocarcinoma HT-29 cell proliferation and tumor volume in mouse hollow fiber and xenograft models, respectively. In both studies it showed similar activity to the clinically used topoisomerase I inhibitor irinotecan. The study suggests that the interrogation of soil microbiomes using synthetic bioinformatic natural product methods has the potential to be a rewarding strategy for identifying potent, biomedically relevant, antiproliferative agents.
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Affiliation(s)
- Zongqiang Wang
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, NY 10065
| | - Amanda Kasper
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, NY 10065
| | - Mai Takahashi
- Laboratory of Systems Cancer Biology, The Rockefeller University, 1230 York Avenue, New York, NY 10065
| | - Adrian Morales Amador
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, NY 10065
| | - Abir Bhattacharjee
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, NY 10065
| | - Jingbo Kan
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, NY 10065
| | - Yozen Hernandez
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, NY 10065
| | - Melinda Ternei
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, NY 10065
| | - Sean F. Brady
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, NY 10065
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3
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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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4
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Bhattacharjee A, Bachovchin DA. DPP8/9 are not Required to Cleave Most Proline-Containing Peptides. Isr J Chem 2023; 63:e202200117. [PMID: 37982048 PMCID: PMC10655806 DOI: 10.1002/ijch.202200117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Indexed: 02/16/2023]
Abstract
Small molecule inhibitors of the intracellular serine peptidases DPP8 and DPP9 (DPP8/9) activate the NLRP1 and CARD8 inflammasomes, but the key DPP8/9 substrates have not yet been identified. DPP8/9 cleave after proline to remove N-terminal dipeptides from peptides or proteins, and studies using pseudo-peptide reporter substrates have suggested that these enzymes may play key roles in the catabolism of many proline-containing peptides generated by the proteasome. Here, we evaluated the degradation of a wide array of actual peptides in cell lysates, and discovered that DPP8/9 are not in fact involved in the processing of the vast majority of proline-containing peptides. Overall, these results indicate that DPP8/9 have a much more limited substrate scope than previously thought, and likely specifically cleave some critically important, but as yet unknown, intracellular peptide or protein that regulates inflammasome activation.
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Affiliation(s)
- Abir Bhattacharjee
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, 10065, USA
| | - Daniel A Bachovchin
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, 10065, USA
- Pharmacology Program of the Weill Cornell, Graduate School of Medical Sciences, Memorial Sloan Kettering Cancer Center, New York, 10065, USA
- Tri-Institutional PhD Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, 10065, USA
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5
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Chen Q, Wang A, Covelli DJ, Bhattacharjee A, Wang Q, Orth-He EL, Rao SD, Huang HC, Ball DP, Hsiao JC, Bachovchin DA. Optimized M24B Aminopeptidase Inhibitors for CARD8 Inflammasome Activation. J Med Chem 2023; 66:2589-2607. [PMID: 36724486 PMCID: PMC10149104 DOI: 10.1021/acs.jmedchem.2c01535] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Inflammasomes are innate immune signaling platforms that trigger pyroptotic cell death. NLRP1 and CARD8 are related human inflammasomes that detect similar danger signals, but NLRP1 has a higher activation threshold and triggers a more inflammatory form of pyroptosis. Both sense the accumulation of intracellular peptides with Xaa-Pro N-termini, but Xaa-Pro peptides on their own without a second danger signal only activate the CARD8 inflammasome. We recently reported that a dual inhibitor of the Xaa-Pro-cleaving M24B aminopeptidases PEPD and XPNPEP1 called CQ31 selectively activates the CARD8 inflammasome by inducing the build-up of Xaa-Pro peptides. Here, we performed structure-activity relationship studies on CQ31 to develop the optimized dual PEPD/XPNPEP1 inhibitor CQ80 that more effectively induces CARD8 inflammasome activation. We anticipate that CQ80 will become a valuable tool to study the basic biology and therapeutic potential of selective CARD8 inflammasome activation.
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Affiliation(s)
- Qifeng Chen
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Alvin Wang
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Dominic J Covelli
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Abir Bhattacharjee
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Qinghui Wang
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Elizabeth L Orth-He
- Tri-Institutional PhD Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Sahana D Rao
- Tri-Institutional PhD Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Hsin-Che Huang
- Tri-Institutional PhD Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Daniel P Ball
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Jeffrey C Hsiao
- Pharmacology Program of the Weill Cornell Graduate School of Medical Sciences, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Daniel A Bachovchin
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
- Tri-Institutional PhD Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
- Pharmacology Program of the Weill Cornell Graduate School of Medical Sciences, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
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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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7
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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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Rao SD, Chen Q, Wang Q, Orth-He EL, Saoi M, Griswold AR, Bhattacharjee A, Ball DP, Huang HC, Chui AJ, Covelli DJ, You S, Cross JR, Bachovchin DA. M24B aminopeptidase inhibitors selectively activate the CARD8 inflammasome. Nat Chem Biol 2022; 18:565-574. [PMID: 35165443 PMCID: PMC9179932 DOI: 10.1038/s41589-021-00964-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 12/16/2021] [Indexed: 12/26/2022]
Abstract
Inflammasomes are multiprotein complexes that sense intracellular danger signals and induce pyroptosis. CARD8 and NLRP1 are related inflammasomes that are repressed by the enzymatic activities and protein structures of the dipeptidyl peptidases 8 and 9 (DPP8/9). Potent DPP8/9 inhibitors such as Val-boroPro (VbP) activate both NLRP1 and CARD8, but chemical probes that selectively activate only one have not been identified. Here we report a small molecule called CQ31 that selectively activates CARD8. CQ31 inhibits the M24B aminopeptidases prolidase (PEPD) and Xaa-Pro aminopeptidase 1 (XPNPEP1), leading to the accumulation of proline-containing peptides that inhibit DPP8/9 and thereby activate CARD8. NLRP1 is distinct from CARD8 in that it directly contacts DPP8/9's active site; these proline-containing peptides, unlike VbP, do not disrupt this repressive interaction and thus do not activate NLRP1. We expect that CQ31 will now become a valuable tool to study CARD8 biology.
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9
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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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10
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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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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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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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17
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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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18
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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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Griswold AR, Ball DP, Bhattacharjee A, Chui AJ, Rao SD, Taabazuing CY, Bachovchin DA. DPP9's Enzymatic Activity and Not Its Binding to CARD8 Inhibits Inflammasome Activation. ACS Chem Biol 2019; 14:2424-2429. [PMID: 31525884 PMCID: PMC6862324 DOI: 10.1021/acschembio.9b00462] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
![]()
Inflammasomes
are multiprotein complexes formed in response to
pathogens. NLRP1 and CARD8 are related proteins that form inflammasomes,
but the pathogen-associated signal(s) and the molecular mechanisms
controlling their activation have not been established. Inhibitors
of the serine dipeptidyl peptidases DPP8 and DPP9 (DPP8/9) activate
both NLRP1 and CARD8. Interestingly, DPP9 binds directly to NLRP1
and CARD8, and this interaction may contribute to the inhibition of
NLRP1. Here, we use activity-based probes, reconstituted inflammasome
assays, and mass spectrometry-based proteomics to further investigate
the DPP9–CARD8 interaction. We show that the DPP9–CARD8
interaction, unlike the DPP9–NLRP1 interaction, is not disrupted
by DPP9 inhibitors or CARD8 mutations that block autoproteolysis.
Moreover, wild-type, but not catalytically inactive mutant, DPP9 rescues
CARD8-mediated cell death in DPP9 knockout cells.
Together, this work reveals that DPP9’s catalytic activity
and not its binding to CARD8 restrains the CARD8 inflammasome and
thus suggests the binding interaction likely serves some other biological
purpose.
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Affiliation(s)
- Andrew R. Griswold
- Tri-Institutional M.D.−Ph.D. Program, Memorial Sloan Kettering Cancer Center, Rockefeller University, Weill Cornell Medical College, New York, New York 10065, United States
- Pharmacology Program, Weill Cornell Graduate School of Medical Sciences, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Daniel P. Ball
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Abir Bhattacharjee
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Ashley J. Chui
- Tri-Institutional Ph.D. Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Sahana D. Rao
- Tri-Institutional Ph.D. Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Cornelius Y. Taabazuing
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Daniel A. Bachovchin
- Pharmacology Program, Weill Cornell Graduate School of Medical Sciences, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
- Tri-Institutional Ph.D. Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
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20
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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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21
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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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22
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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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23
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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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24
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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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25
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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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26
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Bhattacharjee A, Gerasimov MV, DeJong S, Wardrop DJ. Oxamidation of Unsaturated O-Alkyl Hydroxamates: Synthesis of the Madangamine Diazatricylic (ABC Rings) Skeleton. Org Lett 2017; 19:6570-6573. [PMID: 29182290 DOI: 10.1021/acs.orglett.7b03283] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A novel approach to the diazatricyclic madangamine ABC ring system and the synthesis of an advanced, differentially protected intermediate for the synthesis of madangamine D is reported. Central to the success of this approach is the iodine(III)-mediated intramolecular oxamidation of an unsaturated O-methyl hydroxamate, a π-N+-type cyclization which proceeds in high yield and with complete regioselectivity to generate the 2-azabicyclo[3.3.1]nonane (morphan) system encompassing rings A and C.
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Affiliation(s)
- Abir Bhattacharjee
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Room 4500, Chicago, Illinois 60607-7061, United States
| | - Mikhail V Gerasimov
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Room 4500, Chicago, Illinois 60607-7061, United States
| | - Sam DeJong
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Room 4500, Chicago, Illinois 60607-7061, United States
| | - Duncan J Wardrop
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Room 4500, Chicago, Illinois 60607-7061, United States
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27
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Bhattacharjee A, Sinha A, Ratia K, Yin L, Delgado-Rivera L, Petukhov PA, Thatcher GRJ, Wardrop DJ. 2-Arylidene Hydrazinecarbodithioates as Potent, Selective Inhibitors of Cystathionine γ-Lyase (CSE). ACS Med Chem Lett 2017; 8:1241-1245. [PMID: 29259741 DOI: 10.1021/acsmedchemlett.7b00313] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 11/21/2017] [Indexed: 12/15/2022] Open
Abstract
Hydrogen sulfide is produced from l-cysteine by the action of both cystathionine γ-lyase (CSE) and cystathionine β-synthase (CBS) and increasingly has been found to play a profound regulatory role in a range of physiological processes. Mounting evidence suggests that upregulation of hydrogen sulfide biosynthesis occurs in several disease states, including rheumatoid arthritis, hypertension, ischemic injury, and sleep-disordered breathing. In addition to being critical tools in our understanding of hydrogen sulfide biology, inhibitors of CSE hold therapeutic potential for the treatment of diseases in which increased levels of this gasotransmitter play a role. We describe the discovery and development of a novel series of potent CSE inhibitors that show increased activity over the benchmark inhibitor and, importantly, display high selectivity for CSE versus CBS.
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Affiliation(s)
- Abir Bhattacharjee
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Antara Sinha
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Kiira Ratia
- Department of Medicinal Chemistry & Pharmacognosy, University of Illinois College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612, United States
| | - Liang Yin
- Department of Medicinal Chemistry & Pharmacognosy, University of Illinois College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612, United States
| | - Loruhama Delgado-Rivera
- Department of Medicinal Chemistry & Pharmacognosy, University of Illinois College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612, United States
| | - Pavel A Petukhov
- Department of Medicinal Chemistry & Pharmacognosy, University of Illinois College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612, United States
| | - Gregory R. J. Thatcher
- Department of Medicinal Chemistry & Pharmacognosy, University of Illinois College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612, United States
| | - Duncan J. Wardrop
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
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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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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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31
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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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32
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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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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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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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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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Choudhury N, Bhattacharjee A, Dhar (Chanda) D, Chakravarty A. Expansion of diverse inc F type plasmids within enterobacteriaceae conferring multidrug resistant trait in tertiary referral hospital in north east India. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.232] [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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Elizabeth R, Roy S, Paul D, Dhar D, Chakravarty A, Bhattacharjee A. Transcriptional response of arnA and pmrB in relation to polymyxin resistance in Pseudomonas aeruginosa associated with surgical wound infection: A study from North- East India. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.239] [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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Chetri S, Bhattacharjee A, Dhar Chanda D, Chakravarty A. Transcriptional response of AcrAB-TolC conferring carbapenems resistance within escherichia coli associated with community acquired infection. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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