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Bhattacharya A, Chauhan P, Singh SP, Narayan S, Bajpai RK, Dwivedi A, Mishra A. Bacillus tequilensis influences metabolite production in tomato and restores soil microbial diversity during Fusarium oxysporum infection. Plant Biol (Stuttg) 2024. [PMID: 38682466 DOI: 10.1111/plb.13647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 02/08/2024] [Indexed: 05/01/2024]
Abstract
This study evaluates cellular damage, metabolite profiling, and defence-related gene expression in tomato plants and soil microflora during Fusarium wilt disease after treatment with B. tequilensis PBE-1. Histochemical analysis showed that PBE-1 was the primary line of defence through lignin deposition and reduced cell damage. GC-MS revealed that PBE-1 treatment ameliorated stress caused by F. oxysporum infection. PBE-1 also improved transpiration, photosynthesis, and stomatal conductance in tomato. qRT-PCR suggested that the defence-related genes FLS2, SERK, NOS, WRKYT, NHO, SAUR, and MYC2, which spread infection, were highly upregulated during F. oxysporum infection, but either downregulated or expressed normally in PBE-1 + P treated plants. This indicates that the plant not only perceives the bio-control agent as a non-pathogen entity but its presence in normal metabolism and gene expression within the host plant is maintained. The study further corroborated findings that application of PBE-1 does not cause ecological disturbances in the rhizosphere. Activity of soil microflora across four treatments, measured by Average Well Colour Development (AWCD), showed continuous increases from weeks 1 to 4 post-pathogen infection, with distinct substrate usage patterns like tannic and fumaric acids impacting microbial energy source utilization and diversity. Principal Component Analysis (PCA) and diversity indices like McIntosh, Shannon, and Simpson further illustrated significant microbial community shifts over the study period. In conclusion, our findings demonstrate that B. tequilensis PBE-1 is an ideal bio-agent for field application during Fusarium wilt disease management in tomato.
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Affiliation(s)
- A Bhattacharya
- Division of Microbial Technology, CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - P Chauhan
- Division of Microbial Technology, CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- School of Sciences, P P Savani University, Surat, Gujarat, India
| | - S P Singh
- Pharmacognosy Division, CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh, India
| | - S Narayan
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- Plant Physiology Laboratory, CSIR-National Botanical Research Institute, Lucknow, India
| | - R K Bajpai
- Ex Director Research Services, Indira Gandhi Krishi Vishwavidyalaya, Raipur, India
| | - A Dwivedi
- Photobiology Division, CSIR-Indian Institute of Toxicology Research, Lucknow, India
| | - A Mishra
- Division of Microbial Technology, CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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Loya-Lopez SI, Allen HN, Duran P, Calderon-Rivera A, Gomez K, Kumar U, Shields R, Zeng R, Dwivedi A, Saurabh S, Korczeniewska OA, Khanna R. Intranasal CRMP2-Ubc9 inhibitor regulates Na V 1.7 to alleviate trigeminal neuropathic pain. Pain 2024; 165:573-588. [PMID: 37751532 PMCID: PMC10922202 DOI: 10.1097/j.pain.0000000000003053] [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] [Received: 07/11/2023] [Accepted: 07/25/2023] [Indexed: 09/28/2023]
Abstract
ABSTRACT Dysregulation of voltage-gated sodium Na V 1.7 channels in sensory neurons contributes to chronic pain conditions, including trigeminal neuropathic pain. We previously reported that chronic pain results in part from increased SUMOylation of collapsin response mediator protein 2 (CRMP2), leading to an increased CRMP2/Na V 1.7 interaction and increased functional activity of Na V 1.7. Targeting this feed-forward regulation, we developed compound 194 , which inhibits CRMP2 SUMOylation mediated by the SUMO-conjugating enzyme Ubc9. We further demonstrated that 194 effectively reduces the functional activity of Na V 1.7 channels in dorsal root ganglia neurons and alleviated inflammatory and neuropathic pain. Here, we used a comprehensive array of approaches, encompassing biochemical, pharmacological, genetic, electrophysiological, and behavioral analyses, to assess the functional implications of Na V 1.7 regulation by CRMP2 in trigeminal ganglia (TG) neurons. We confirmed the expression of Scn9a , Dpysl2 , and UBE2I within TG neurons. Furthermore, we found an interaction between CRMP2 and Na V 1.7, with CRMP2 being SUMOylated in these sensory ganglia. Disrupting CRMP2 SUMOylation with compound 194 uncoupled the CRMP2/Na V 1.7 interaction, impeded Na V 1.7 diffusion on the plasma membrane, and subsequently diminished Na V 1.7 activity. Compound 194 also led to a reduction in TG neuron excitability. Finally, when intranasally administered to rats with chronic constriction injury of the infraorbital nerve, 194 significantly decreased nociceptive behaviors. Collectively, our findings underscore the critical role of CRMP2 in regulating Na V 1.7 within TG neurons, emphasizing the importance of this indirect modulation in trigeminal neuropathic pain.
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Affiliation(s)
- Santiago I. Loya-Lopez
- Department of Molecular Pathobiology, College of Dentistry, New York University, New York, New York, United States of America
- NYU Pain Research Center, 433 First Avenue, New York, NY 10010, United States of America
| | - Heather N. Allen
- Department of Molecular Pathobiology, College of Dentistry, New York University, New York, New York, United States of America
- NYU Pain Research Center, 433 First Avenue, New York, NY 10010, United States of America
| | - Paz Duran
- Department of Molecular Pathobiology, College of Dentistry, New York University, New York, New York, United States of America
- NYU Pain Research Center, 433 First Avenue, New York, NY 10010, United States of America
| | - Aida Calderon-Rivera
- Department of Molecular Pathobiology, College of Dentistry, New York University, New York, New York, United States of America
- NYU Pain Research Center, 433 First Avenue, New York, NY 10010, United States of America
| | - Kimberly Gomez
- Department of Molecular Pathobiology, College of Dentistry, New York University, New York, New York, United States of America
- NYU Pain Research Center, 433 First Avenue, New York, NY 10010, United States of America
| | - Upasana Kumar
- Center for Orofacial Pain and Temporomandibular Disorders, Department of Diagnostic Sciences, Rutgers School of Dental Medicine, Newark, NJ 07101, United States of America
| | - Rory Shields
- Rutgers School of Graduate Studies, Newark Health Science Campus, Newark, NJ 07101, United States of America
| | - Rui Zeng
- Department of Chemistry, College of Arts and Sciences, New York University, 100 Washington Square East, New York, NY 10003, United States of America
| | - Akshat Dwivedi
- Department of Chemistry, College of Arts and Sciences, New York University, 100 Washington Square East, New York, NY 10003, United States of America
| | - Saumya Saurabh
- Department of Chemistry, College of Arts and Sciences, New York University, 100 Washington Square East, New York, NY 10003, United States of America
| | - Olga A. Korczeniewska
- Center for Orofacial Pain and Temporomandibular Disorders, Department of Diagnostic Sciences, Rutgers School of Dental Medicine, Newark, NJ 07101, United States of America
- Rutgers School of Graduate Studies, Newark Health Science Campus, Newark, NJ 07101, United States of America
| | - Rajesh Khanna
- Department of Molecular Pathobiology, College of Dentistry, New York University, New York, New York, United States of America
- NYU Pain Research Center, 433 First Avenue, New York, NY 10010, United States of America
- Department of Neuroscience and Physiology and Neuroscience Institute, School of Medicine, New York University, New York, NY, 10010, USA
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Meeraus W, de Munter L, Gray CM, Dwivedi A, Wyndham-Thomas C, Ouwens M, Hartig-Merkel W, Drikite L, Rebry G, Carmona A, Stuurman AL, Chi Nguyen TY, Mena G, Mira-Iglesias A, Icardi G, Otero-Romero S, Baumgartner S, Martin C, Taylor S, Bollaerts K. Protection against COVID-19 hospitalisation conferred by primary-series vaccination with AZD1222 in non-boosted individuals: first vaccine effectiveness results of the European COVIDRIVE study and meta-regression analysis. Lancet Reg Health Eur 2023; 31:100675. [PMID: 37547274 PMCID: PMC10398604 DOI: 10.1016/j.lanepe.2023.100675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 05/30/2023] [Accepted: 06/14/2023] [Indexed: 08/08/2023]
Abstract
Background Vaccine effectiveness (VE) studies with long-term follow-up are needed to understand durability of protection against severe COVID-19 outcomes conferred by primary-series vaccination in individuals not receiving boosters. COVIDRIVE is a European public-private partnership evaluating brand-specific vaccine effectiveness (VE). We report a prespecified interim analysis of primary-series AZD1222 (ChAdOx1 nCoV-19) VE. Methods Seven Study Contributors in Europe collected data on individuals aged ≥18 years who were hospitalised with severe acute respiratory infection (June 1st, 2021-September 5th, 2022) and eligible for COVID-19 vaccination prior to hospitalisation. In this test-negative case-control study, individuals were defined as test-positive cases or test-negative controls (SARS-CoV-2 RT-PCR) and were either fully vaccinated (two AZD1222 doses, 4-12 weeks apart, completed ≥14 days prior to symptom onset; no booster doses) or unvaccinated (no COVID-19 vaccine prior to hospitalisation). The primary objective was to estimate AZD1222 VE against COVID-19 hospitalisation. A literature review and meta-regression were conducted to contextualise findings on durability of protection. Findings 761 individuals were included during the 15-month analysis period. Overall AZD1222 VE estimate was 72.8% (95% CI, 53.4-84.1). VE was 93.8% (48.6-99.3) in participants who received second AZD1222 doses ≤8 weeks prior to hospitalisation, with spline-based VE estimates demonstrating protection (VE ≥ 50%) 30 weeks post-second dose. Meta-regression analysis (data from seven publications) showed consistent results, with ≥80% protection against COVID-19 hospitalisation through ∼43 weeks post-second dose, with some degree of waning. Interpretation Primary-series AZD1222 vaccination confers protection against COVID-19 hospitalisation with enduring levels of VE through ≥6 months. Funding AstraZeneca.
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Affiliation(s)
- Wilhelmine Meeraus
- Medical Evidence, Vaccines & Immune Therapies, AstraZeneca, Cambridge, UK
| | | | - Christen M. Gray
- Real World Science, BioPharmaceuticals Medical, AstraZeneca, Cambridge, UK
| | | | | | - Mario Ouwens
- Medical and Payor Statistics, BioPharmaceutical Business Unit, AstraZeneca, Mölndal, Sweden
| | | | - Laura Drikite
- P95 Pharmacovigilance and Epidemiology, Leuven, Belgium
| | - Griet Rebry
- P95 Pharmacovigilance and Epidemiology, Leuven, Belgium
| | - Antonio Carmona
- Vaccine Research Department, Fundación para el Fomento de la Investigación Sanitaria y Biomédica (FISABIO) de la Comunitat Valenciana, Salud Pública, Valencia, Spain
- Biomedical Research Consortium of Epidemiology and Public Health (CIBER-ESP), Instituto de Salud Carlos III, Madrid, Spain
| | - Anke L. Stuurman
- Medical Evidence, Vaccines & Immune Therapies, AstraZeneca, Cambridge, UK
- P95 Pharmacovigilance and Epidemiology, Leuven, Belgium
| | - Thi Yen Chi Nguyen
- Medical Evidence, Vaccines & Immune Therapies, AstraZeneca, Cambridge, UK
- P95 Pharmacovigilance and Epidemiology, Leuven, Belgium
| | - Guillermo Mena
- Preventive Medicine Department - Germans Trias i Pujol University Hospital, Badalona, Spain
- Autonomous University of Barcelona, Bellaterra, Spain
- Germans Trias I Pujol Research Institute (IGTP), Badalona, Spain
| | - Ainara Mira-Iglesias
- Vaccine Research Department, Fundación para el Fomento de la Investigación Sanitaria y Biomédica (FISABIO) de la Comunitat Valenciana, Salud Pública, Valencia, Spain
- Biomedical Research Consortium of Epidemiology and Public Health (CIBER-ESP), Instituto de Salud Carlos III, Madrid, Spain
| | - Giancarlo Icardi
- Interuniversity Research Centre on Influenza and Other Transmissible Infections (CIRI-IT), Genoa, Italy
- Department of Health Sciences, University of Genoa, Italy
| | - Susana Otero-Romero
- Servicio de Medicina Preventiva y Epidemiología, Hospital Universitari Vall d'Hebron, Vall d'Hebron Barcelona Campus Hospitalari, Barcelona, Spain
| | - Sebastian Baumgartner
- Fourth Medical Department with Infectious Diseases and Tropical Medicine, Klinik Favoriten/Kaiser-Franz-Josef Hospital, Vienna, Austria
| | - Charlotte Martin
- Infectious Diseases Department, Centre Hospitalier Universitaire Saint-Pierre, Brussels, Belgium
| | - Sylvia Taylor
- Medical Evidence, Vaccines & Immune Therapies, AstraZeneca, Cambridge, UK
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Loya-Lopez SI, Allen HN, Duran P, Calderon-Rivera A, Gomez K, Kumar U, Shields R, Zeng R, Dwivedi A, Saurabh S, Korczeniewska OA, Khanna R. Intranasal CRMP2-Ubc9 Inhibitor Regulates Na V 1.7 to Alleviate Trigeminal Neuropathic Pain. bioRxiv 2023:2023.07.16.549195. [PMID: 37502910 PMCID: PMC10370107 DOI: 10.1101/2023.07.16.549195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Dysregulation of voltage-gated sodium Na V 1.7 channels in sensory neurons contributes to chronic pain conditions, including trigeminal neuropathic pain. We previously reported that chronic pain results in part from increased SUMOylation of collapsin response mediator protein 2 (CRMP2), leading to an increased CRMP2/Na V 1.7 interaction and increased functional activity of Na V 1.7. Targeting this feed-forward regulation, we developed compound 194 , which inhibits CRMP2 SUMOylation mediated by the SUMO-conjugating enzyme Ubc9. We further demonstrated that 194 effectively reduces the functional activity of Na V 1.7 channels in dorsal root ganglia neurons and alleviated inflammatory and neuropathic pain. Here, we employed a comprehensive array of investigative approaches, encompassing biochemical, pharmacological, genetic, electrophysiological, and behavioral analyses, to assess the functional implications of Na V 1.7 regulation by CRMP2 in trigeminal ganglia (TG) neurons. We confirmed the expression of Scn9a , Dpysl2 , and UBE2I within TG neurons. Furthermore, we found an interaction between CRMP2 and Na V 1.7, with CRMP2 being SUMOylated in these sensory ganglia. Disrupting CRMP2 SUMOylation with compound 194 uncoupled the CRMP2/Na V 1.7 interaction, impeded Na V 1.7 diffusion on the plasma membrane, and subsequently diminished Na V 1.7 activity. Compound 194 also led to a reduction in TG neuron excitability. Finally, when intranasally administered to rats with chronic constriction injury of the infraorbital nerve (CCI-ION), 194 significantly decreased nociceptive behaviors. Collectively, our findings underscore the critical role of CRMP2 in regulating Na V 1.7 within TG neurons, emphasizing the importance of this indirect modulation in trigeminal neuropathic pain.
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Dwivedi A, Roy A, Rai SB. Photoluminescence behavior of rare earth doped self-activated phosphors ( i.e. niobate and vanadate) and their applications. RSC Adv 2023; 13:16260-16271. [PMID: 37266502 PMCID: PMC10230514 DOI: 10.1039/d3ra00629h] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 05/17/2023] [Indexed: 06/03/2023] Open
Abstract
In the present study, the photoluminescence behaviors of rare earth doped self-activated phosphors are discussed briefly. Different techniques were used to develop these phosphor samples. We prepared pure and rare earth doped phosphor samples to look for their various applications. The structural confirmations and surface morphologies were performed using X-ray diffraction (XRD) and scanning electron microscopy (SEM) measurements, respectively. The upconversion (UC) phenomenon was investigated in Tm3+/Yb3+ and Ho3+/Yb3+ co-doped niobate and vanadate based phosphors, which gave intense blue/NIR and green/red emissions with a 980 nm diode laser as an excitation source. Pure niobate and vanadate phosphor materials are self-activated hosts which give broad blue emission under UV excitation. Upon UV excitation, intense broad blue emission along with sharp emissions due to Tm3+ and Ho3+ ions are observed via energy transfer between niobate/vanadate and rare earth ions. These self-activated hosts show prominent downshifting (DS) behavior. Broad band quantum cutting (QC) was observed in these self-activated hosts, in which a blue emitting photon is converted into two NIR photons by co-doping Yb3+ ions in it. The multimodal (upconversion, downshifting and quantum cutting) behaviors of these phosphors make them very promising in various applications, such as spectral converters to enhance the efficiency of a c-Si solar cell, security ink and color tunable materials.
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Affiliation(s)
- A Dwivedi
- Sunbeam Women's College Varuna Varanasi-221002 India
| | - A Roy
- Department of Physics, Banaras Hindu University Varanasi-221005 India
| | - S B Rai
- Department of Physics, Banaras Hindu University Varanasi-221005 India
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Choudhary AK, Dwivedi A, Rai SB. Photoluminescence behavior of Eu 3+ doped XAl 2O 4(X = Mg, Ca, Sr and Ba) phosphors: a comparative study. Methods Appl Fluoresc 2022; 10. [PMID: 35705103 DOI: 10.1088/2050-6120/ac7942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 06/15/2022] [Indexed: 11/12/2022]
Abstract
In this work, the Eu3+doped stuffed tridymite type structure of alkaline earths aluminate i.e. XAl2O4(X = Mg, Ca, Sr and Ba) phosphor materials have been synthesized by conventional high temperature solid state reaction method at 1623 K. The Samples were structurally and morphologically characterized by x-ray diffraction (XRD) and Scanning electron microscope (SEM) measurements. The vibrational behavior of the phosphor samples were investigated by Fourier transform infrared (FTIR) measurements. The phosphor samples emit intense red emission in 610-615 nm range due to5D0 → 7F2transition of Eu3+ion on excitation with charge transfer band (CTB) wavelength arising due to Eu3+-O2-and also by the discrete bands of Eu3+ions .The decay time of5D0level of Eu3+ion were recorded on excitation with 393 nm and by the CTB wavelength for all the four samples. The optimized 1 mol% Eu3+doped CaAl2O4phosphor exhibits optimum emission intensity and color purity under the excitation with 393 nm than others. The decay time is also found to be larger in the case of Eu3+doped CaAl2O4phosphor sample. Therefore, Eu3+doped CaAl2O4phosphor may be promising material for red color light emitting applications and white light generation.
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Affiliation(s)
- A K Choudhary
- Department of Physics, G. B. College, Ramgarh, Kaimur, Veer Kunwar Singh University, Bihar, India
| | - A Dwivedi
- Department of Physics, University of Allahabad, Prayagraj-211002, India
| | - S B Rai
- Department of Physics, Banaras Hindu University, Varanasi, 221005, India
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Chufal K, Ahmad I, Dwivedi A, Bajpai R, Miller A, Chowdhary R, Gairola M. PO-1802 Deep learning using Pre-NACRT imaging can predict pathological response in esophageal cancer. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)08253-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Elayavel R, Bandyopadhyay A, Dwivedi A, Bhatia N, Puri S, Jain K. Accidental insertion of a central venous catheter into the pericardial sac without traversing vascular structures. Anaesth Rep 2020; 8:201-202. [PMID: 33345193 DOI: 10.1002/anr3.12089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/24/2020] [Indexed: 11/12/2022] Open
Affiliation(s)
- R Elayavel
- Department of Anaesthesia and Intensive Care Postgraduate Institute of Medical Education and Research Chandigarh India
| | - A Bandyopadhyay
- Department of Anaesthesia and Intensive Care Postgraduate Institute of Medical Education and Research Chandigarh India
| | - A Dwivedi
- Department of Anaesthesia and Intensive Care Postgraduate Institute of Medical Education and Research Chandigarh India
| | - N Bhatia
- Department of Anaesthesia and Intensive Care Postgraduate Institute of Medical Education and Research Chandigarh India
| | - S Puri
- Department of Anaesthesia and Intensive Care Postgraduate Institute of Medical Education and Research Chandigarh India
| | - K Jain
- Department of Anaesthesia and Intensive Care Postgraduate Institute of Medical Education and Research Chandigarh India
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Chellamanimegalai P, Pavan-Kumar A, Balange AK, Dwivedi A, Deshmukhe G. New Record of Marine Red Algal Species <i>Grateloupia orientalis</i> Showe M. Lin & H.Y. Liang and <i>G. catenata</i> Yendo (halymeniaceae, Rhodophyta) from the East Coast of India. CURR SCI INDIA 2020. [DOI: 10.18520/cs/v119/i5/849-854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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Gianni U, Tantawy S, Amoa F, Dwivedi A, Sato Y, Wijeratne R, Hollenberg E, Alawamlh O. AH, Elshafeey A, Lu Y, van den Hoogen I., van Rosendael A., Bax M, Yahagi K, Torii S, Jinnouchi H, Romero M, Surve D, Finn A, Earls J, Min J, Shaw L, Fowler D, Virmani R, Lin F. Dual-energy Coronary Computed Tomography Angiography Is Superior To Single Energy Computed Tomography For Evaluation Of Necrotic Core In Sudden Cardiac Death. J Cardiovasc Comput Tomogr 2020. [DOI: 10.1016/j.jcct.2020.06.154] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kadam S, Gautam S, Dwivedi A, Jain V. Treatment of gingival recession defect using human umbilical cord mesenchymal stem cells cultured on PCL based bone regenerating scaffold: a randomized controlled clinical study. Cytotherapy 2019. [DOI: 10.1016/j.jcyt.2019.03.413] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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12
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Dwivedi A, Kumar A, Bhat JL. Production and Characterization of Biosurfactant from Corynebacterium Species and Its Effect on the Growth of Petroleum Degrading Bacteria. Microbiology (Reading) 2019. [DOI: 10.1134/s002626171901003x] [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: 11/23/2022] Open
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13
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Molokwu J, Dwivedi A, Mallawaarachchi I, Hernandez A, Shokar N. Tiempo de Vacunarte (time to get vaccinated): Outcomes of an intervention to improve HPV vaccination rates in a predominantly Hispanic community. Prev Med 2019; 121:115-120. [PMID: 30776387 DOI: 10.1016/j.ypmed.2019.02.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 01/31/2019] [Accepted: 02/06/2019] [Indexed: 12/20/2022]
Abstract
The purpose of this study was to evaluate effects of a culturally tailored evidence-based HPV vaccine educational intervention on psychosocial factors and vaccine completion in a largely low-income Hispanic population. Our study is a prospective community based intervention utilizing a prepost design. We recruited individual's dwelling in a border community aged 18-26 years or parents/guardians of children aged 9-17 years who had not completed the HPV vaccine series. We recruited 2380 participants between June 2015 and February 2018. We included 1796 participants in the final analysis. Mean age of the sample was 22.8 years (SD2.60). Majority of participants 63.99 were female and self-identified as Hispanic (97.4%). A total of 3192 vaccines were administered with an overall vaccine completion rate of 39.8%; 31.6% among adult participants compared to 48.7% among children. The Intervention significantly improved HPV knowledge by 61.66%, HPV awareness by 19.45%, Intention to vaccinate by 13.85%. For both adults and children being born in Mexico significantly improved the odds of vaccine completion (AOR: 2.154 95% CI: 1.439-3.224), while for adults only pre-intervention perceived benefits remained significant (AOR 1.101, CI: 1.002-1.210) and in children the main factor was parental perceived susceptibility of their child (AOR: 1.257 CI: 1.001-1.578). A Community based multicomponent HPV vaccine intervention significantly improved HPV immunization rates in a largely Hispanic population. Factors that affect completion of the HPV series are different among adults and children.
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Affiliation(s)
- J Molokwu
- Department of Family and Community Medicine, Texas Tech University Health Sciences Center El Paso, 9849 Kenworthy Street, El Paso, TX 79924, USA.
| | - A Dwivedi
- Department of Biostatistics and Epidemiology, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, El Paso, TX, USA.
| | - I Mallawaarachchi
- Department of Biostatistics and Epidemiology, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, El Paso, TX, USA
| | - A Hernandez
- Department of Family and Community Medicine, Texas Tech University Health Sciences Center El Paso, El Paso, TX, USA.
| | - N Shokar
- Department of Family and Community Medicine & Biomedical Sciences, Texas Tech University Health Sciences Center El Paso, El Paso, TX, USA; Department of Family and Community Medicine, Paul l. Foster School of Medicine, Texas Tech University Health Sciences Center El Paso, 9849 Kenworthy Street, El Paso, TX 79924, USA; Department of Biomedical Sciences, Paul l. Foster School of Medicine, Texas Tech University Health Sciences Center El Paso, Medical Science Building, 5001 El Paso Drive, El Paso, TX 79905, USA..
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14
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Waghamare RN, Paturkar AM, Vaidya VM, Zende RJ, Dubal ZN, Dwivedi A, Gaikwad RV. Phenotypic and genotypic drug resistance profile of Salmonella serovars isolated from poultry farm and processing units located in and around Mumbai city, India. Vet World 2018; 11:1682-1688. [PMID: 30774258 PMCID: PMC6362326 DOI: 10.14202/vetworld.2018.1682-1688] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Accepted: 10/25/2018] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND AND AIM The extensive use of antimicrobials in poultry has led to an increase in bacterial multidrug resistance, and the emergence of multidrug-resistant nontyphoidal Salmonella is a global problem. This study was performed to detect antibiotic-resistant Salmonella serovars in poultry farming and processing environment. MATERIALS AND METHODS A total of 956 various samples, comprising 432 farm origin, 324 poultry processing stage wise and environmental, and 154 product processing stages and environmental samples, were collected from poultry farms and processing units located in and around Mumbai city. Of a total of 71 recovered isolates, 42 randomly selected Salmonella isolates were subjected for antibiotic susceptibility testing by disk diffusion method and serotyping. A total of 31 serotypically confirmed isolates were characterized for the presence of tetA, tetB, bla TEM, and CTX-M gene. RESULTS Higher resistance was recorded against Doxycycline (100%), followed by Oxytetracycline (97.62%), Neomycin (88.10%), Erythromycin (83.33%), Tetracycline (78.57%), and Ceftizoxime (35.71%). Resistance from 0.00 to 26.19 percent was found to antimicrobials, namely Norfloxacin (26.19%), Ampicillin (21.43%), Azithromycin (21.43%), Ciprofloxacin (19.05%), Colistin (4.76%), Streptomycin (16.67%), Cefotaxime (14.19%), Enrofloxacin (14.29%), Amoxyclav (14.29%), Gentamicin (7.14%), Chloramphenicol (4.76%), Amikacin (4.76%), and Ceftazidime (0.0%). Results demonstrate that the Salmonella Virchow dominated and all serotypes were found to carry Tetracycline resistance gene tetA, 5 isolates were found to be positive for blaTEM , whereas none of the isolates were carrying tetB and CTX-M gene. CONCLUSION This study revealed that there is a significant rise of Tetracycline resistance with the presence of tetA gene in Salmonella spp. which indicates selective pressure for adopting resistance against tetracycline group of antibiotics.
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Affiliation(s)
- R. N. Waghamare
- Department of Veterinary Public Health, Bombay Veterinary College, Parel, Mumbai, Maharashtra, India
| | - A. M. Paturkar
- Department of Veterinary Public Health, Bombay Veterinary College, Parel, Mumbai, Maharashtra, India
| | - V. M. Vaidya
- Department of Veterinary Public Health, Bombay Veterinary College, Parel, Mumbai, Maharashtra, India
| | - R. J. Zende
- Department of Veterinary Public Health, Bombay Veterinary College, Parel, Mumbai, Maharashtra, India
| | - Z. N. Dubal
- Department of Veterinary Public Health, ICAR - Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - A. Dwivedi
- Department of Veterinary Public Health, ICAR - Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - R. V. Gaikwad
- Department of Veterinary Public Health, Bombay Veterinary College, Parel, Mumbai, Maharashtra, India
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Arun A, Ansari MI, Popli P, Jaiswal S, Mishra AK, Dwivedi A, Hajela K, Konwar R. New piperidine derivative DTPEP acts as dual-acting anti-breast cancer agent by targeting ERα and downregulating PI3K/Akt-PKCα leading to caspase-dependent apoptosis. Cell Prolif 2018; 51:e12501. [PMID: 30091186 DOI: 10.1111/cpr.12501] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 06/02/2018] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVES In our ongoing studies to develop ER targeting agents, we screened for dual-acting molecules with a hypothesis that a single molecule can also target both ER positive and negative groups of breast cancer. MATERIALS AND METHODS 1-(2-(4-(Dibenzo[b,f]thiepin-10-yl)phenoxy)ethyl)piperidine (DTPEP) was synthesized and screened in both MCF-7 (ER+ve) and MDA-MB-231 (ER-ve) cells. Assays for analysis of cell cycle, ROS, apoptosis and MMP loss were carried out using flow cytometry. Its target was investigated using western blot, transactivation assay and RT-PCR. In vivo efficacy of DTPEP was validated in LA-7 syngeneic rat mammary tumour model. RESULTS Here, we report identification of dual-acting molecule DTPEP that downregualtes PI3K/Akt and PKCα expression, induces ROS and ROS-dependent apoptosis, loss of mitochondrial membrane potential, induces expression of caspase indicative of both intrinsic and extrinsic apoptosis in MCF-7 and MDA-MB-231 cells. In MCF-7 cells, DTPEP downregulates ERα expression and activation. In MDA-MB-231 cells, primary cellular target of DTPEP is not clearly known, but it downregualtes PI3K/Akt and PKCα expression. In vivo study showed regression of LA-7 syngeneic mammary tumour in SD rat. CONCLUSIONS We identified a new dual-acting anti-breast cancer molecules as a proof of concept which is capable of targeting both ER-positive and ER-negative breast cancer.
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Affiliation(s)
- A Arun
- Endocrinology Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | - M I Ansari
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | - P Popli
- Endocrinology Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | - S Jaiswal
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | - A K Mishra
- Department of Endocrine Surgery, King George's Medical University, Lucknow, UP, India
| | - A Dwivedi
- Endocrinology Division, CSIR-Central Drug Research Institute, Lucknow, UP, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Drug Research Institute Campus, Lucknow, UP, India
| | - K Hajela
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, UP, India
| | - R Konwar
- Endocrinology Division, CSIR-Central Drug Research Institute, Lucknow, UP, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Drug Research Institute Campus, Lucknow, UP, India
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Choudhary AK, Singh SK, Dwivedi A, Bahadur A, Rai SB. Enhanced upconversion emission of Er 3+/Yb 3+ and Er 3+/Yb 3+/Zn 2+ doped calcium aluminate for use in optical thermometry and laser induced optical heating. Methods Appl Fluoresc 2018; 6:035014. [PMID: 29848806 DOI: 10.1088/2050-6120/aac8f9] [Citation(s) in RCA: 6] [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] [Indexed: 11/12/2022]
Abstract
There are two key factors to design an efficient green upconversion (UC) emission based optical sensor for temperature. The primary need is to develop a thermally stable and economical material, for a stable sensor, and the second essence is to get an efficient green UC emission, for high sensitivity of the sensor. The proof of this concept is demonstrated on a model system CaAl2O4: Er3+, co-doped with Yb3+ and Zn2+. UC emission of Er3+ ion is enhanced, primarily, through co-operative energy transfer from Yb3+ to Er3+ ions. Secondly, we prove that, incorporation of Zn2+ ions alters local crystal field environment around Er3+ ions which causes an enhancement in green UC emission. The variation in intensity ratio of 2H11/2 → 4I15/2 (green) and 4S3/2 → 4I15/2 (green) transitions with temperature is studied to report the sensing property. We show that, sensitivity becomes better with an increase in UC efficiency and the best sensitivity is attained for CaAl(0.793)2Er0.007Yb0.05Zn0.15O4 sample, ∼0.0154 K-1 at 308 K. The obtained result is compared with other works and implies its better suitability. Further, the laser induced optical heating is also observed. The laser induced optical heating has been observed experimentally at 400 K above 1 W laser power. This has been further verified by theoretical justification of heating at various pump powers.
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Affiliation(s)
- A K Choudhary
- Department of Physics, Banaras Hindu University, Varanasi 221005, India
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17
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Dwivedi A, Mishra K, Rai SB. Investigation of Upconversion, downshifting and quantum -cutting behavior of Eu 3+, Yb 3+, Bi 3+ co-doped LaNbO 4 phosphor as a spectral conversion material. Methods Appl Fluoresc 2018; 6:035001. [PMID: 29480807 DOI: 10.1088/2050-6120/aab253] [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: 11/12/2022]
Abstract
This work presents the spectral conversion characteristics [upconversion (UC), downshifting (DS) and quantum-cutting (QC) optical processes] of Eu3+, Yb3+ and Bi3+ co-doped LaNbO4 (LBO) phosphor samples synthesized by solid state reaction technique. The crystal structure and the pure phase formation have been confirmed by x-ray diffraction (XRD) measurements. The surface morphology and particle size are studied by scanning electron microscopy (SEM). The rarely observed intense red UC emission from Eu3+ ion has been successfully obtained in Eu3+/Yb3+ co-doped LaNbO4 phosphor (on excitation with 980 nm) by optimizing the concentrations of Eu3+ and Yb3+ ions. The downshifting (DS) behavior has been studied by photoluminescence (PL) measurements on excitation with 265 nm wavelength from a Xe lamp source. A broad blue emission in the region 300-550 nm with its maximum ∼415 nm due to charge transfer band (CTB) of the host and large number of sharp peaks due to f-f transitions of Eu3+ ion have been observed. The energy transfer has been observed from (NbO4)3- to Eu3+ ion and the fluorescence emission has been optimized by varying the concentration of Eu3+ ion. An intense red emission has also been observed corresponding to 5D0 → 7F2 transition of Eu3+ ion at 611 nm in LBO: 0.09Eu3+ phosphor on excitation with 394 nm. The luminescence properties of Eu3+ ion are enhanced further through the sensitization effect of Bi3+ ion. The near infra-red (NIR) quantum cutting (QC) behavior due to Yb3+ ion has been monitored on excitation with 265 as well as 394 nm. The NIR QC is observed due to 2F5/2 → 2F7/2 transition of Yb3+ ion via co-operative energy transfer (CET) process from (NbO4)3- as well as Eu3+ ions to Yb3+ ion. This multimodal behavior (UC, DS and QC) makes this a promising phosphor material for multi-purpose spectral converter.
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Affiliation(s)
- A Dwivedi
- Laser and Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi-221005, India
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Otoukesh S, Nahleh Z, Mirshahidi HR, Nguyen AL, Botrus G, Badri N, Diab N, Alvarado A, Sanchez LA, Dwivedi A. Abstract P6-10-04: “Disparities in breast cancer: A multi-institutional comparative analysis focusing on American Hispanics”. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p6-10-04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Breast cancer (BC) is the leading cause of cancer death in Hispanic/Latina women nationwide. Hispanic women are more likely to be presented with advanced disease and might have adverse prognosis. Further, the Hispanics of Mexican-American origin might reflect different clinico-pathological characteristics as opposed to other Hispanics and ethnic groups. No previous largest studies comprised with Hispanics of Mexican-American origin explored tumor characteristics and compared to other ethnic groups. Thus, the aim of this study was to describe the clinico- pathological characteristics and disparities in breast cancer in this minority group at two tertiary care University- based medical centers in 2 states with a large Hispanic presence.
Methods: After IRB approval, cancer registry was used to analyze the variables of 3,441 patients with breast cancer diagnosed and treated consecutively at two large tertiary University based medical centers in El Paso, TX and Loma Linda, CA between 2005-2015. Unadjusted and adjusted associations of race/ethnicity with cancer stage, hormone receptor status and treatment option were investigated, as well as comparison to other ethnic groups.
Results: Overall 45.5% of the patients were Hispanic (n= 1566). Hispanics were more likely to be diagnosed at a younger age (57 years) compared to in non-Hispanic (NH) whites, more likely to have invasive ductal carcinoma type (82.7%) & triple negative disease (17.1%, 95%CI: 15% to 19%). 58.8% of Hispanics (95%CI: 56% to 61%) have HR+ & HER2- as opposed to 71% in NH whites. In addition, Hispanic individuals presented with advanced stages (III and IV) of BC (25.3%, 95% CI: 23% to 28%) similar to African Americans (25.4%), and had a lower proportion of lumpectomy versus mastectomy compared to NH whites (50%) but similar to African Americans (50%). Hispanic patients had the highest prevalence of triple negative BC (17.1% in Hispanics Versus 13.9 % in African Americans, versus 8.5% in NH whites). Hispanics also had significantly higher relative risk of HER2+/HR - disease (RRR=1.77, p<0.0001) compared to NH whites with no difference in African Americans (RRR= 1.21, p=0.56).
Conclusions: This large multi-institutional study shows that Hispanics are diagnosed with breast cancer at a younger age, have a higher prevalence of triple negative and HER2 positive/HR- breast cancer, are diagnosed at more advanced stages of disease and undergo less lumpectomies compared to NH whites. Increased efforts geared toward early detection, improving awareness and access to health care is desperately needed in this rapidly increasing minority in the U.S.
Citation Format: Otoukesh S, Nahleh Z, Mirshahidi HR, Nguyen AL, Botrus G, Badri N, Diab N, Alvarado A, Sanchez LA, Dwivedi A. “Disparities in breast cancer: A multi-institutional comparative analysis focusing on American Hispanics” [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P6-10-04.
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Affiliation(s)
- S Otoukesh
- Loma Linda University, Loma Linda, CA; Texas Tech University Health Sciences Center (TTUHSC), El Paso, TX
| | - Z Nahleh
- Loma Linda University, Loma Linda, CA; Texas Tech University Health Sciences Center (TTUHSC), El Paso, TX
| | - HR Mirshahidi
- Loma Linda University, Loma Linda, CA; Texas Tech University Health Sciences Center (TTUHSC), El Paso, TX
| | - AL Nguyen
- Loma Linda University, Loma Linda, CA; Texas Tech University Health Sciences Center (TTUHSC), El Paso, TX
| | - G Botrus
- Loma Linda University, Loma Linda, CA; Texas Tech University Health Sciences Center (TTUHSC), El Paso, TX
| | - N Badri
- Loma Linda University, Loma Linda, CA; Texas Tech University Health Sciences Center (TTUHSC), El Paso, TX
| | - N Diab
- Loma Linda University, Loma Linda, CA; Texas Tech University Health Sciences Center (TTUHSC), El Paso, TX
| | - A Alvarado
- Loma Linda University, Loma Linda, CA; Texas Tech University Health Sciences Center (TTUHSC), El Paso, TX
| | - LA Sanchez
- Loma Linda University, Loma Linda, CA; Texas Tech University Health Sciences Center (TTUHSC), El Paso, TX
| | - A Dwivedi
- Loma Linda University, Loma Linda, CA; Texas Tech University Health Sciences Center (TTUHSC), El Paso, TX
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Nahleh Z, Botrus G, Dwivedi A, Badri N, Otoukesh S, Diab N, Biswas S, Jennings M, Elzamly S. Clinico-pathologic disparities of breast cancer in Hispanic/Latina women. Breast Dis 2018; 37:147-154. [PMID: 29376844 DOI: 10.3233/bd-170309] [Citation(s) in RCA: 8] [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] [Indexed: 01/30/2023]
Abstract
BACKGROUND Breast cancer is the leading cause of cancer death in Hispanic/Latina women nationwide. Limited cancer research has been conducted in this population. El Paso, Texas is a large border city with a population of around 900,000, of which 85% are Latinos and would provide a suitable setting for this study. The aim of this study is to evaluate ethnic differences and cancer characteristics in Hispanic/latina women with breast cancer. METHODS After IRB approval, we retrospectively analyzed the variables of patients with breast cancer treated consecutively at a large tertiary medical center in El Paso, TX between 2005-2015. Descriptive statistics, bivariate, and multivariable analyses were conducted. RESULTS 1,252 patients were identified. Mean age at diagnosis was 57 years. 1074 were Hispanics/Latinas (86%). When comparing Hispanics versus non-Hispanics, 31% of Hispanics compared to 24% Non-Hispanics were diagnosed at age <50 (P = 0.043). More Hispanics are uninsured (34%) compared to Non-Hispanics (25%) (p = 0.008). Hispanics presenting with advanced stages were more likely to be uninsured (P = 0.02). CONCLUSIONS This analysis confirms that Hispanics/Latinas are diagnosed with breast cancer at a younger age and are more commonly uninsured than Non-Hispanics. We did not observe significant differences in the prevalence of ER+, triple negative or Her2 -neu positive disease or stages at presentation between the 2 groups in this cohort, however the non-Hispanic group was constituted only 14% of the studied population. A larger multi-institutional comparative study is being conducted to confirm these findings.
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Affiliation(s)
- Z Nahleh
- Department of Hematology-Oncology, Maroone Cancer Center, Cleveland Clinic Florida 2950 Cleveland Clinic Blvd, Weston, Fl 33331, USA
| | - G Botrus
- Department of Internal Medicine, Texas Tech University Health Sciences Center Paul L. Foster School of Medicine, El Paso, TX, USA
| | - A Dwivedi
- Department of Biomedical Sciences, Texas Tech University Health Sciences Center Foster School of Medicine, EL Paso, TX, USA
| | - N Badri
- Department of Internal Medicine, Texas Tech University Health Sciences Center Paul L. Foster School of Medicine, El Paso, TX, USA
| | - S Otoukesh
- Department of Internal Medicine, Loma Linda University, Loma Linda, CA, USA
| | - N Diab
- Department of Internal Medicine, Texas Tech University Health Sciences Center Paul L. Foster School of Medicine, El Paso, TX, USA
| | - S Biswas
- Department of Internal Medicine, Texas Tech University Health Sciences Center Paul L. Foster School of Medicine, El Paso, TX, USA
| | - M Jennings
- Department of Internal Medicine, Texas Tech University Health Sciences Center Paul L. Foster School of Medicine, El Paso, TX, USA
| | - S Elzamly
- Pathology Department, Faculty of Medicine, Benha University, Benha, Egypt
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Choudhary AK, Dwivedi A, Bahadur A, Rai SB. Effect of the concentration of the dopants (Er 3+, Yb 3+ and Zn 2+) and temperature on the upconversion emission behavior of Er 3+/Yb 3+ co-doped SrAl 2O 4 phosphor. Spectrochim Acta A Mol Biomol Spectrosc 2017; 185:155-162. [PMID: 28570986 DOI: 10.1016/j.saa.2017.05.036] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Revised: 05/05/2017] [Accepted: 05/16/2017] [Indexed: 06/07/2023]
Abstract
Er3+/Yb3+ co-doped SrAl2O4 (SRA: Er3+, Yb3+) phosphor has been synthesized by high temperature solid state reaction technique. The pure phase formation has been confirmed by X-ray diffraction (XRD) measurements. The surface morphology is studied by scanning electron microscopy (SEM) technique. The FTIR measurements give the information of vibrational bands arising due to sample. The intense UC emission from SRA: Er3+, Yb3+ phosphor has been monitored on excitation with 980nm diode laser. The SRA: Er3+, Yb3+ samples prepared at 1473K show a dominant green emission. On the other hand it shows dominant red emission when the sample is heated to 1623K. Variation of concentration of Er3+ and Yb3+ ions in SRA: Er3+, Yb3+ phosphor suggests two possible mechanisms involved in UC emission process viz. cross relaxation (CR) process and energy back transfer (EBT) process, respectively. The cross relaxation mechanism seems to play a major role. The UC emission efficiency is enhanced several times on co-doping of Zn2+ ion replacing Al3+ or Sr2+ in SRA: Er3+, Yb3+ phosphor sample. The color of the UC emission can be tuned from green to red region by varying the concentration of zinc.
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Affiliation(s)
- Ajay Kumar Choudhary
- Laser and Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005, India
| | - A Dwivedi
- Laser and Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005, India
| | - A Bahadur
- Laser and Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005, India
| | - S B Rai
- Laser and Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005, India.
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Kumar D, Banerjee T, Chakravarty J, Singh SK, Dwivedi A, Tilak R. Identification, antifungal resistance profile, in vitro biofilm formation and ultrastructural characteristics of Candida species isolated from diabetic foot patients in Northern India. Indian J Med Microbiol 2017; 34:308-14. [PMID: 27514952 DOI: 10.4103/0255-0857.188320] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
PURPOSE Diabetic foot ulcers are a serious cause of diagnostic and therapeutic concern. The following study was undertaken to determine the fungal causes of diabetic foot ulcers, with their phenotypic and genotypic characterisation. MATERIALS AND METHODS A total of 155 diabetic foot ulcers were studied for 1 year. Deep tissue specimen was collected from the wounds, and crushed samples were plated on Sabouraud dextrose agar with chloramphenicol (0.05 g). Identification was done by growth on cornmeal agar, germ tube formation and urease test. For molecular identification, conserved portion of the 18S rDNA region, the adjacent internal transcribed spacer 1 (ITS1) and a portion of the 28S rDNA region were amplified, using the ITS1 and ITS2 primers. Antifungal susceptibility against voriconazole, fluconazole and amphotericin B was determined by standard broth microdilution method. Biofilm formation was studied in three steps. First, on the surface of wells of microtiter plates followed by quantification of growth by fungal metabolism measurement. Finally, biofilms were analysed by scanning electron microscopy (SEM). RESULTS Fungal aetiology was found in 75 patients (48.38%). All were identified as Candida species (100%). The prevalence of different species was Candida tropicalis (34.6%), Candida albicans (29.3%), Candida krusei (16.0%), Candida parapsilosis (10.6%), Candida glabrata (9.33%). All were susceptible to amphotericin B (100%). On microtiter plate, all the isolates were viable within 48 h showing biofilms. The metabolic activity of cells in the biofilm increased with cellular mass, especially in the first 24 h. On SEM, majority showed budding yeast form. CONCLUSION Non-albicans Candida spp. with potential biofilm forming ability are emerging as a predominant cause of diabetic foot ulcers.
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Affiliation(s)
- D Kumar
- Department of Microbiology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - T Banerjee
- Department of Microbiology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - J Chakravarty
- Department of General Medicine, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - S K Singh
- Department of Endocrinology and Metabolism, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - A Dwivedi
- Department of Endocrinology and Metabolism, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - R Tilak
- Department of Microbiology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
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Fullybright R, Dwivedi A, Mallawaarachchi I, Sinsin B. Erratum to: Modeling and predicting drug resistance rate and strength. Eur J Clin Microbiol Infect Dis 2016; 35:1893. [PMID: 27566687 DOI: 10.1007/s10096-016-2758-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- R Fullybright
- Department of Applied Research, Applied-Research Center for True Development, 4016 rue Préfontaine, Montréal, Québec, H1W 0A3, Canada.
| | - A Dwivedi
- Division of Biostatistics and Epidemiology, Department of Biomedical Sciences, Texas Tech University Health Sciences Center, 4801 Alberta Avenue, El Paso, TX, 79905, USA
| | - I Mallawaarachchi
- Division of Biostatistics and Epidemiology, Department of Biomedical Sciences, Texas Tech University Health Sciences Center, 4801 Alberta Avenue, El Paso, TX, 79905, USA
| | - B Sinsin
- Laboratory of Applied Ecology, School of Agronomic Sciences, University of Abomey-Calavi, 05 BP 1752, Cotonou, Republic of Benin
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Rana S, Dwivedi A, Kumar K. 88P Need of new conceptual tool for breast cancer care management in India. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv519.37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Chandra V, Fatima I, Manohar M, Popli P, Sirohi VK, Hussain MK, Hajela K, Sankhwar P, Dwivedi A. Inhibitory effect of 2-(piperidinoethoxyphenyl)-3-(4-hydroxyphenyl)-2H-benzo(b)pyran (K-1) on human primary endometrial hyperplasial cells mediated via combined suppression of Wnt/β-catenin signaling and PI3K/Akt survival pathway. Cell Death Dis 2014; 5:e1380. [PMID: 25144715 PMCID: PMC4454309 DOI: 10.1038/cddis.2014.334] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 06/16/2014] [Accepted: 06/18/2014] [Indexed: 01/18/2023]
Abstract
Endometrial hyperplasia is a precursor to the most common gynecologic cancer diagnosed in women. Apart from estrogenic induction, aberrant activation of the Wnt/β-catenin signal is well known to correlate with endometrial hyperplasia and its carcinoma. The benzopyran compound 2-(piperidinoethoxyphenyl)-3-(4-hydroxyphenyl)-2H-benzo (b) pyran(K-1), a potent antiestrogenic agent, has been shown to have apoptosis-inducing activity in rat uterine hyperplasia. The current study was undertaken to explore the effect of the benzopyran compound K-1 on growth and Wnt signaling in human endometrial hyperplasial cells. Primary culture of atypical endometrial hyperplasial cells was characterized by the epithelial cell marker cytokeratin-7. Results revealed that compound K-1 reduced the viability of primary endometrial hyperplasial cells and expression of ERα, PR, PCNA, Wnt7a, FZD6, pGsk3β and β-catenin without affecting the growth of the primary culture of normal endometrial cells. The β-catenin target genes CyclinD1 and c-myc were also found to be reduced, whereas the expression of axin2 and Wnt/β-catenin signaling inhibitor Dkk-1 was found to be upregulated, which caused the reduced interaction of Wnt7a and FZD6. Nuclear accumulation of β-catenin was found to be decreased by compound K-1. K-1 also suppressed the pPI3K/pAkt survival pathway and induced the cleavage of caspases and PARP, thus subsequently causing the apoptosis of endometrial hyperplasial cells. In conclusion, compound K-1 suppressed the growth of human primary endometrial hyperplasial cells through discontinued Wnt/β-catenin signaling and induced apoptosis via inhibiting the PI3K/Akt survival pathway.
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Affiliation(s)
- V Chandra
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - I Fatima
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - M Manohar
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - P Popli
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - V K Sirohi
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - M K Hussain
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - K Hajela
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - P Sankhwar
- Department of Obstetrics & Gynecology, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - A Dwivedi
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
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Joshi C, Dwivedi A, Rai SB. Structural morphology, upconversion luminescence and optical thermometric sensing behavior of Y2O3:Er(3+)/Yb(3+) nano-crystalline phosphor. Spectrochim Acta A Mol Biomol Spectrosc 2014; 129:451-456. [PMID: 24751781 DOI: 10.1016/j.saa.2014.03.048] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [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: 11/30/2013] [Revised: 03/01/2014] [Accepted: 03/21/2014] [Indexed: 06/03/2023]
Abstract
Infrared-to-visible upconverting rare earths Er(3+)/Yb(3+) co-doped Y2O3 nano-crystalline phosphor samples have been prepared by solution combustion method followed by post-heat treatment at higher temperatures. A slight increase in average crystallite size has been found on calcinations verified by X-ray analysis. Transmission electron microscopy (TEM) confirms the nano-crystalline nature of the as-prepared and calcinated samples. Fourier transform infrared (FTIR) analysis shows the structural changes in as-prepared and calcinated samples. Upconversion and downconversion emission recorded using 976 and 532 nm laser sources clearly demonstrates a better luminescence properties in the calcinated samples as compared to as-prepared sample. Upconversion emission has been quantified in terms of standard chromaticity diagram (CIE) showing a shift in overall upconversion emission of as-prepared and calcinated samples. Temperature sensing behaviour of this material has also been investigated by measurement of fluorescence intensity ratio (FIR) of various signals in green emission in the temperature range of 315 to 555 K under 976 nm laser excitation.
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Affiliation(s)
- C Joshi
- Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
| | - A Dwivedi
- Laser & Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005, India
| | - S B Rai
- Laser & Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005, India.
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Bhattacharya A, Watts N, Dwivedi A, Shukla R, Mani A, Diab D. A Transformative Risk Assessment Approach for Osteoporosis Fracture-Combined Measures of Dynamic Bone Quality and Postural Balance. J Clin Densitom 2014. [DOI: 10.1016/j.jocd.2014.04.072] [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: 11/25/2022]
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Dwivedi A, Mujtaba SF, Yadav N, Kushwaha HN, Amar SK, Singh SK, Pant MC, Ray RS. Cellular and molecular mechanism of ofloxacin induced apoptotic cell death under ambient UV-A and sunlight exposure. Free Radic Res 2014; 48:333-46. [DOI: 10.3109/10715762.2013.869324] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Dwivedi A, Singh AK, Rai SB. Down-shifting and upconversion photoluminescence in Ho3+/Yb3+ codoped GdNbO4: effect of the Bi3+ ion and the magnetic field. Dalton Trans 2014; 43:15906-14. [DOI: 10.1039/c4dt01864h] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Energy transfer from host to activator ion, down-shifting, upconversion and effect of magnetic field and Bi3+ ions on photoluminescence of Ho3+ have been investigated.
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Affiliation(s)
- A. Dwivedi
- Department of Physics
- Banaras Hindu University
- Varanasi-221005, India
| | - A. K. Singh
- Department of Physics
- Banaras Hindu University
- Varanasi-221005, India
- Instituto de Ciencias Físicas
- Universidad Nacional Autónoma de México
| | - S. B. Rai
- Department of Physics
- Banaras Hindu University
- Varanasi-221005, India
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Hussain MK, Ansari MI, Yadav N, Gupta PK, Gupta AK, Saxena R, Fatima I, Manohar M, Kushwaha P, Khedgikar V, Gautam J, Kant R, Maulik PR, Trivedi R, Dwivedi A, Kumar KR, Saxena AK, Hajela K. Design and synthesis of ERα/ERβ selective coumarin and chromene derivatives as potential anti-breast cancer and anti-osteoporotic agents. RSC Adv 2014. [DOI: 10.1039/c3ra45749d] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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Fatima I, Saxena R, Kharkwal G, Hussain MK, Yadav N, Hajela K, Sankhwar PL, Dwivedi A. The anti-proliferative effect of 2-[piperidinoethoxyphenyl]-3-[4-hydroxyphenyl]-2H-benzo(b) pyran is potentiated via induction of estrogen receptor beta and p21 in human endometrial adenocarcinoma cells. J Steroid Biochem Mol Biol 2013; 138:123-31. [PMID: 23688837 DOI: 10.1016/j.jsbmb.2013.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Revised: 04/15/2013] [Accepted: 04/16/2013] [Indexed: 12/14/2022]
Abstract
In an effort to develop novel therapeutic agents for endometrial cancer, benzopyran derivatives synthesized at our institute display significant inhibitory activity on cellular growth in uterine cancer cells. The current study was undertaken to demonstrate and explore the estrogen receptor (ER) subtype mediated mechanism of action of benzopyran derivative 2-[piperidinoethoxyphenyl]-3-[4-hydroxyphenyl]-2H-benzo(b) pyran (K-1) in human endometrial cancer cells. K-1 competitively inhibited the estradiol binding to human ERα and ERβ and showed growth inhibitory activity in human endometrial Ishikawa, HEC1B and primary endometrial adenocarcinoma cells. Transient transactivation assays carried out in COS-1 cells have demonstrated the diminished ERα-ERE mediated- and induced the ERβ-ERE mediated-transactivation triggered by compound. It also induced ER-mediated transactivation of the cyclin-dependent kinase inhibitor (CDKI) p21(WAF-1) in both COS-1 cells and in Ishikawa cells. ERβ inducing effects of compound were blocked by ICI182,780. In endometrial adenocarcinoma cells, it induced ERβ and p21 expression significantly whereas the expression of fos, jun and ERα were significantly reduced. In addition, compound promoted ERα-β heterodimerization as observed in Ishikawa cells. These results demonstrate that the benzopyran compound suppressed the cellular growth via ERβ agonism, induction of p21 and via promoting the ERα-β heterodimerization, in addition to its antagonistic effects exerted on ERα, in human endometrial cancer cells. The study suggests that the dual action of benzopyran molecule may be of significant therapeutic value in ERα/β-positive cases of endometrial cancer.
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Affiliation(s)
- I Fatima
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow 226001, U.P., India
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Chandra V, Fatima I, Saxena R, Hussain M, Hajela K, Sankhwar P, Roy B, Chandna S, Dwivedi A. Anti-tumorigenic action of 2-[piperidinoethoxyphenyl]-3-[4-hydroxyphenyl]-2H-benzo(b)pyran: Evidence for involvement of GPR30/EGFR signaling pathway. Gynecol Oncol 2013; 129:433-42. [DOI: 10.1016/j.ygyno.2013.02.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 01/11/2013] [Accepted: 02/03/2013] [Indexed: 01/01/2023]
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Fatima I, Chandra V, Saxena R, Manohar M, Sanghani Y, Hajela K, Negi MPS, Sankhwar PL, Jain SK, Dwivedi A. 2,3-Diaryl-2H-1-benzopyran derivatives interfere with classical and non-classical estrogen receptor signaling pathways, inhibit Akt activation and induce apoptosis in human endometrial cancer cells. Mol Cell Endocrinol 2012; 348:198-210. [PMID: 21878365 DOI: 10.1016/j.mce.2011.08.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Revised: 08/11/2011] [Accepted: 08/12/2011] [Indexed: 02/03/2023]
Abstract
OBJECTIVES The present study was undertaken to explore the mechanism of anti-proliferative action of benzopyran compound D1 (2-[piperidinoethoxyphenyl]-3-phenyl-2H-benzopyran) and its hydroxy-(D2) and methoxy-(D3) derivatives in Ishikawa and human primary endometrial adenocarcinoma cells. METHODS Transcriptional activation assays were performed using luciferase reporter system and cell viability was determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT). The stage of cell cycle was determined by flow-cytometry and real time analysis of cyclinE1 and cdc2 genes. The apoptotic effects were measured by AnnexinV/PI staining and TUNEL. The expression of PCNA, cyclinD1, pAkt, XIAP, cleaved caspase-9, -3, PARP, Bax and Bcl2 were determined by immunoblotting. The caspase-3 activity and mitochondrial membrane potential were measured by colorimetric assay. RESULTS All three compounds inhibited E(2)-induced ERE- and AP-1-mediated transactivation and proliferation in endometrial adenocarcinoma cells dose-dependently. Compound D1 caused the arrest of cells in the G(2) phase while D2 and D3 caused arrest in G(1) phase of the cell cycle. All compounds interfered with Akt activation, decreased XIAP expression leading to an increased cleavage of caspase-9, -3, PARP, increased Bax/Bcl2 ratio and caspase-3 activity. CONCLUSION Findings suggest that benzopyran derivatives inhibit cellular proliferation via modulating ER-dependent classical and non-classical signaling mechanisms, interfere with Akt activation and induce apoptosis via intrinsic pathway in endometrial adenocarcinoma cells.
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Affiliation(s)
- I Fatima
- Division of Endocrinology, Central Drug Research Institute, CSIR, Lucknow 226001, UP, India
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Ali D, Verma A, Mujtaba F, Dwivedi A, Hans R, Ray R. UVB-induced apoptosis and DNA damaging potential of chrysene via reactive oxygen species in human keratinocytes. Toxicol Lett 2011; 204:199-207. [DOI: 10.1016/j.toxlet.2011.04.033] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Revised: 04/27/2011] [Accepted: 04/28/2011] [Indexed: 10/18/2022]
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Siddiqui SA, Dwivedi A, Singh PK, Hasan T, Jain S, Prasad O, Misra N. Molecular structure, vibrational spectra and potential energy distribution of protopine using ab initio and density functional theory. J STRUCT CHEM+ 2009. [DOI: 10.1007/s10947-009-0062-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Pandey VK, Dwivedi A, Pandey OP, Sengupta SK. Organophosphorus derivatives containing isatin-3-hydrazones as chemotherapeutants against fungal pathogens of sugarcane. J Agric Food Chem 2008; 56:10779-10784. [PMID: 18954075 DOI: 10.1021/jf801975z] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A total of 20 novel organophosphorus derivatives have been synthesized by the reactions of O,O-diethylchlorophosphate/thiophosphate with isatin-3-(substituted benzoic acid/phenoxy acetic acid hydrazones). The derivatives have been characterized on the basis of analysis and spectral (IR and (1)H and (13)C NMR) data. Fungicidal activities of the derivatives against Colletotrichum falcatum , Fusarium oxysporum , and Curvularia pallescence have been evaluated. The screening results have been correlated with the structural features of the tested compounds. The greater potency has been observed with thiophosphates compared to phosphates, with substituted phenoxy acetic acid hydrazones compared to substituted benzoic acid hydrazones, and with substitutent Cl(-) attached to the aromatic ring compared to other substitutents. O,O-Diethylchlorophosphate compounds containing isatin-3-(4-chlorophenoxy acetic acid hydrazone) (IIe) and the compound containing two molecules of O,O-diethylchlorophosphate attached to isatin-3-(4-hydroxy phenoxy acetic acid) hydrazone (IIh) were proven to be more active than some prevalent commercial synthetic fungicides.
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Affiliation(s)
- V K Pandey
- Chemistry Department, DDU Gorakhpur University, Gorakhpur, India
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36
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Changotra H, Dwivedi A, Nayyar AK, Sehajpal PK. DIAGNOSING DIFFERENT STAGES OF HEPATITIS B INFECTION USING A COMPETITIVE POLYMERASE CHAIN REACTION ASSAY. Indian J Med Microbiol 2008. [DOI: 10.1016/s0255-0857(21)01929-0] [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: 01/04/2023]
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37
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Dwivedi A, Bali RK, Wickramasinghe N, Naguib RNG. How workflow management systems enable the achievement of value driven healthcare delivery. ACTA ACUST UNITED AC 2008; 3:382-93. [PMID: 18048309 DOI: 10.1504/ijeh.2007.014555] [Citation(s) in RCA: 9] [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: 11/21/2022]
Abstract
Healthcare institutions globally are currently having major problems accessing and maintaining the large amounts of data that are continuously being generated. Examination of the clinical procedures relating to patient management reveals that many of these activities are repetitive. Workflow Management Systems (WFMS) can automate these repeated activities. Moreover, the introduction of WFMS would enable healthcare institutions to face this challenge of transforming large amounts of medical data into contextually relevant clinical information and knowledge. In order to emphasise the dynamic connection between healthcare, workflow and internet technologies, the intelligence continuum is introduced.
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Affiliation(s)
- A Dwivedi
- Management Systems Group, Business School, University of Hull, Hull HU6 7RX, UK.
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Wickramasinghe N, Bali R, Naguib R, Dwivedi A. The importance of understanding different management paradigms in today's global economy. IJIL 2008. [DOI: 10.1504/ijil.2008.017365] [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: 11/21/2022]
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40
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Sehajpal PK, Changotra H, Dwivedi A, Nayyar AK. Diagnosing different stages of hepatitis B infection using a competitive polymerase chain reaction assay. Indian J Med Microbiol 2008; 26:138-42. [DOI: 10.4103/0255-0857.40527] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract
The upper extremity arterial system shows a large number of variations in the adult human body. Most of these variations occur in either the radial or ulnar artery; brachial artery variations are less common. Because the upper extremity is a frequent site of injury and various surgical and invasive procedures are performed in this region, it is of utmost importance to be aware of arterial variations. We report a case of a high bifurcation of the brachial artery presenting with acute ischemia secondary to an embolic event. The anomaly was identified, and the ischemia was successfully resolved with embolectomy.
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Affiliation(s)
- C. Cherukupalli
- Division of Vascular Surgery, North Shore University Hospital-Long Island Jewish Medical Centers, Manhasset, New York,
| | - A. Dwivedi
- Division of Vascular Surgery, North Shore University Hospital-Long Island Jewish Medical Centers, Manhasset, New York
| | - R. Dayal
- Division of Vascular Surgery, North Shore University Hospital-Long Island Jewish Medical Centers, Manhasset, New York, Albert Einstein College of Medicine Bronx, New York
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Singh KD, Sharma S, Dwivedi A, Pandey P, Thakur RL, Kumar V. Microbial decolorization and bioremediation of melanoidin containing molasses spent wash. J Environ Biol 2007; 28:675-677. [PMID: 18380094] [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] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Molasses spent wash from cane-molasses based distilleries contains a brown coloured recalcitrantpolymer melanoidin, which if disposed untreated poses a great threat to environment. Microbial decolorization and chemical oxygen demand (COD) reduction was found to be dependent on specific carbon and nitrogen source. Under optimal condition of pH, carbon and nitrogen concentration for each treatment, it was found that Bacillus sp isolated from soil was capable of removing COD (85. 35%) and colour (81.10%) from distillery waste to the maximum extent after 9 days atpH 7 in the medium containing 0.5% peptone, 2% glucose and 10% (v/v), followed by Phanerochaete chrysosporium and lowest reduction was obtained by using native microbial consortium.
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Affiliation(s)
- K D Singh
- Department of Microbiology, Division of Life Sciences, S.B.S (P.G) Institute of Biomedical Sciences and Research, Balawala-248161, Dehradun, India
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Awasthi S, Blesson CS, Dwivedi A. Expression of oestrogen receptors alpha and beta during the period of uterine receptivity in rat: effect of ormeloxifene, a selective oestrogen receptor modulator. Acta Physiol (Oxf) 2007; 189:47-56. [PMID: 17280556 DOI: 10.1111/j.1748-1716.2006.01638.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS In the present study, we investigated expression, distribution and regulation of oestrogen receptors (ERs) alpha and beta and their modulation by ormeloxifene (Orm) during the period of uterine receptivity in rat uterus in order to determine their role in endometrial sensitization. METHODS Uterine tissues of control and Orm-treated (1.25 mg kg(-1), orally) rats were collected on days 3, 4, 5 morning and day 5 evening post-coitum referring to non-receptive, pre-receptive and receptive phases respectively. mRNA and protein expression levels were determined by RT-PCR and Western blot respectively. Immunohistochemical technique was used to localize the receptors. RESULTS RT-PCR analysis revealed that ERalpha mRNA reached a peak level on day 5 morning whereas ERbeta mRNA expression was found to be very low. In Orm-treated rats, the ERalpha mRNA was suppressed at day 5. The protein expression of ERalpha increased after day 3 and that of ERbeta remained very low throughout the pre-implantation period; Orm caused a decrease in ERalpha on day 5 morning. In endometrium, ERalpha expression was regulated differentially in luminal epithelium, glandular epithelium and stroma. Orm caused a decrease in the percentage of ERalpha-positive nuclei in all the three endometrial compartments on days 4 and 5, and the magnitude of reduction varied spatio-temporally. In case of ERbeta, immunostaining was not detectable in Orm-treated and control groups. CONCLUSION It appears that the complex uterine response to implantation is governed by differential cell-specific ERalpha expression. The study suggested the inhibitory activity of Orm on ERalpha during the period of uterine receptivity.
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Affiliation(s)
- S Awasthi
- Division of Endocrinology, Central Drug Research Institute, Lucknow, Uttar Pradesh, India
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Dwivedi A, Wickramasinghe N, Bali R, Naguib R, Goldberg S. Critical success factors for achieving superior m-health success. ACTA ACUST UNITED AC 2007; 3:261-78. [DOI: 10.1504/ijeh.2007.013104] [Citation(s) in RCA: 6] [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: 11/21/2022]
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Srinivasan KR, Dwivedi A, Jain SK, Mehrotra PK. Demonstration of uterine receptivity in vitro by co-culture of rat epithelial cells and blastocyst. Cell Tissue Res 2006; 325:135-41. [PMID: 16528553 DOI: 10.1007/s00441-005-0109-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2005] [Accepted: 10/25/2005] [Indexed: 10/24/2022]
Abstract
Uterine receptivity is prerequisite for the attachment of the embryo to the uterine epithelium and involves a specialized polarity-dependent property of uterine epithelial (UE) cells. These UE cells, when polarized in culture, behave like cells in utero by exhibiting apico-basal polarity. In order to develop an implantation model in vitro, UE cells were polarized on extracellular matrix (ECM), and polarity was validated by response to estradiol-17beta administered exogenously. UE cells of pregnant rats at day-3 and day-4 post-coitum (p.c.) and of non-pregnant rats were cultured on bare and extracellular-matrix-coated petri dishes until confluency. Hatched blastocysts were transferred to the cultures, and adhesion was monitored every 24 h. Although blastocysts attached to UE cells that were taken from non-pregnant rats and from rats of day-3 p.c. and cultured on bare plastic, they failed to attach to these cells polarized on ECM. However, blastocysts attached firmly to UE cells that had been taken from rats of day-4 p.c. and polarized on ECM. Receptivity of UE cells taken from non-pregnant and pregnant (day-4 p.c.) rats was quantitated by flow cytometric estimation of cellular levels of beta3 integrin. The expression of beta3 integrin in UE cells from rats of day-4 p.c. was highly significant (P<0.01) when compared with its expression in UE cells from non-pregnant rats. The expression of beta3 integrin in UE cells of day-4 p.c. confirmed the receptivity of these cells to blastocyst implantation. Uterine receptivity was also validated in vivo by inducing the decidual cell reaction in rats ovariectomized on day-3 and day-4 p.c. Whereas remarkable deciduoma was noticed in the animals of day-4 p.c., it was absent in the animals of day-3 p.c., thereby indicating that the uterus was receptive on day-4 p.c. only. Thus, blastocysts do not attach to polarized UE cells that have been obtained from a non-receptive uterus. Attachment will occur only if the cells are obtained from a receptive uterus. UE cell receptivity is therefore essential for mimicking the process of implantation in vitro.
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Affiliation(s)
- K R Srinivasan
- Division of Endocrinology, Central Drug Research Institute, P.O. Box-173, 226 001 Lucknow, India
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Dwivedi A, Sehajpal PK. Development of a competitor DNA template of the 38 kDa gene for molecular quantification of M. tuberculosis. Int J Tuberc Lung Dis 2005; 9:1412-4. [PMID: 16466067] [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: 05/06/2023] Open
Abstract
The molecular quantification of Mycobacterium tuberculosis (TB) from clinical samples can improve the management of TB. Competitive polymerase chain reaction (C-PCR) is an accepted technique often used for this purpose, and IS6110 is the most popular target in such studies. As the number of these elements varies from 0 to 16 in clinical isolates, it is prone to give inconsistent results. A simple PCR-based approach is described in this study to generate a novel competitor for a single copy 38 kDa gene for the development of C-PCR for the quantification of the M. tuberculosis genome.
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Affiliation(s)
- A Dwivedi
- Department of Molecular Biology and Biochemistry, Guru Nanak Dev University, Amritsar, India
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Abstract
BACKGROUND A modified clinical presentation of tuberculous meningitis (TBM) in children vaccinated with BCG has been described in the literature. However, most reports are old and not based on actual comparisons and tests of significance. Also, neuroimaging features were not compared. With large scale BCG coverage, it becomes pertinent to describe the "modified" presentation and identify any significant differences between vaccinated and unvaccinated children with TBM. METHODS A total of 150 consecutive hospitalised children (96 unvaccinated, 54 vaccinated) were enrolled. They all satisfied predefined criteria for diagnosis of TBM. Clinical and radiological features of children with/without a BCG scar were compared. RESULTS Univariate analysis revealed that the vaccinated children with TBM had significantly lower rates of altered sensorium (68.5% v 85.4% unvaccinated; OR 2.2 (1.1 to 6.2); p = 0.019) and focal neurological deficits (20.3% v 39.5% unvaccinated; OR 2.6 (1.1 to 6.0); p = 0.016), and higher mean (SD) Glasgow Coma Scale score (10.2 (3.4) v 8.76 (2.7) unvaccinated; p = 0.010) and cerebrospinal fluid cell count (210.9 v 140.9 unvaccinated; p = 0.019). No significant radiological differences were seen. Short term outcome was significantly better in the vaccinated group with 70% of the total severe sequelae and 75% of the total deaths occurring in the unvaccinated group (p = 0.018). CONCLUSION Children with TBM who have been vaccinated with BCG appear to maintain better mentation and have a superior outcome. This may in part be explained by the better immune response to infection, as reflected in the higher CSF cell counts in this group in the present study.
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Affiliation(s)
- R Kumar
- Department of Pediatrics, King George Medical University, Lucknow, India 226003.
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Mehrotra PK, Kitchlu S, Dwivedi A, Agnihotri PK, Srivastava S, Roy R, Bhaduri AP. Emetine ditartrate: a possible lead for emergency contraception. Contraception 2004; 69:379-87. [PMID: 15105060 DOI: 10.1016/j.contraception.2003.12.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2003] [Revised: 12/02/2003] [Accepted: 12/19/2003] [Indexed: 11/30/2022]
Abstract
Interception of pregnancy in its initial stage is an attractive and viable approach to contraception. A chemical agent, taken within the first few days of missed menses, intercepts the conception, which is expelled with menstrual flow. The main targets of such agents are the uterus, blastocyst and the growing trophoblasts, whose nutritional requirement is inhibited. Our previous work has identified several nonsteroidal chemical entities as pregnancy interceptives in rodents and infrahuman primates. However, none reached clinical stage due to their ineffectiveness by oral route. Nevertheless, parallel to these rationally designed synthetic compounds, a program was ongoing to identify natural product(s) that can be used as interceptives. We are reporting for the first time the detailed profile of emetine ditartrate, a compound whose pregnancy interceptive efficacy has been studied in mouse, rat, hamster, guinea pig and rabbit by oral and intravaginal routes of administration. By the oral route, the compound caused 100% resorption of the fetuses in rat, hamster and guinea pig at 6.0, 5.0 and 3.0 mg/kg, respectively, on administration during peri- and early postimplantation periods of pregnancy (depending upon the day of implantation in each species). By intravaginal route, the compound was administered once in the form of a vaginal pessary on the day of implantation in respective species; interception of pregnancy was not achieved completely in rat and hamster at doses four to five times the oral dose in multi-day schedule. However, in guinea pig and rabbit it was fully effective at 7.0 and 70.0 mg/animal, respectively. The compound was devoid of estrogenic, antiestrogenic and progestational activity but possessed mild antiprogestational activity at the high dose in vivo. In in vitro assay, however, it did not show any significant binding to estrogen and progesterone receptors. The mode of action of the compound was found to be mainly on the uterus and early embryos around implantation, possibly on the trophoblasts and endometrial cells at the attachment site. The absence of 100% efficacy in rat and hamster by intravaginal route, but not by oral route, is possibly due to poor absorption of the compound through the vagina in these species. The guinea pig and rabbit, therefore, seem the better species for evaluating the efficacy of the compound administered by the vaginal route.
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Affiliation(s)
- P K Mehrotra
- Division of Endocrinology, Central Drug Research Institute, Lucknow, India.
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Jackson S, DeGrado W, Dwivedi A, Parthasarathy A, Higley A, Krywko J, Rockwell A, Markwalder J, Wells G. Template-Constrained Cyclic Peptides: Design of High-Affinity Ligands for GPIIb/IIIa. J Am Chem Soc 2002. [DOI: 10.1021/ja00087a007] [Citation(s) in RCA: 146] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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