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Tyagi V, Pahwa M, Chadha S, Mittal T, Ahuja A. Robot-assisted radical cystectomy with intracorporeal urinary diversion - An experience with hybrid sandwich technique. EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)02186-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Festok R, Ahuja A, Chen J, Barron J, Yeung H. LB961 Clinical contexts of long-term antibiotic prescriptions for acne: A qualitative study. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.981] [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: 11/24/2022]
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Xiao N, Ahuja A, Patel R, Nemcek A, Resnick S. Abstract No. 77 Median arcuate ligament compression related pancreaticoduodenal arcade aneurysms: a 22-year single-center experience. J Vasc Interv Radiol 2022. [DOI: 10.1016/j.jvir.2022.03.158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Abstract
IntroductionThe mental health of Adolescents in America is a major concern for the field of psychiatry. In particular, Lesbian, Gay, Bisexual and Transgender (LGBT) adolescents are at higher risk of adverse mental health outcomes. This is largely attributed to “minority stress” and from outright bullying and discrimination. In this presentation, this link between bullying and depression will be explored.ObjectivesBy the end of this presentation, the audience will be able to better understand the link between anti-LGBT bullying and mental illness and identify the ways to help their patients.MethodsThis presentation is informed by a literature search from PubMed In addition, it is informed by a symposium previously done at the American Psychiatric Association (APA) annual meeting in 2014.ResultsThere is clear evidence in the literature that bullying of LGBT adolescents is pervasive. In addition, LGBT people are more likely to be depressed than their heterosexual counterparts. This combination has led to 4-5 times higher rates of attempted suicide by LGBT adolescents. Having Gay-Straight Alliances in schools, supportive teachers and school administrators, and broader anti-discrimination legislation has a protective effect on this.ConclusionLGBT adolescents are exposed to more stress by being a minority in society and by being explicitly bullied and discriminated against. This can lead to depression in some of these adolescents, and can also lead to suicide in the most vulnerable among them. There are proven ways to reduce these risks, and psychiatrists have a role to play in advocating for these reforms.Disclosure of interestThe author has not supplied his declaration of competing interest.
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Gschwendtner E, Turner M, Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Batsch F, Bracco C, Braunmüller F, Burger S, Burt G, Buttenschön B, Caldwell A, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Goddard B, Gorgisyan I, Gorn AA, Granados E, Grulke O, Hartin A, Helm A, Henderson JR, Hüther M, Ibison M, Jolly S, Keeble F, Kelisani MD, Kim SY, Kraus F, Krupa M, Lefevre T, Li Y, Liu S, Lopes N, Lotov KV, Martyanov M, Mazzoni S, Minakov VA, Molendijk JC, Moody JT, Moreira M, Muggli P, Panuganti H, Pardons A, Peña Asmus F, Perera A, Petrenko A, Pukhov A, Rey S, Sherwood P, Silva LO, Sosedkin AP, Tuev PV, Velotti F, Verra L, Verzilov VA, Vieira J, Welsch CP, Wendt M, Williamson B, Wing M, Woolley B, Xia G. Correction to 'Proton-driven plasma wakefield acceleration in AWAKE'. Philos Trans A Math Phys Eng Sci 2020; 378:20190539. [PMID: 31865874 PMCID: PMC6939239 DOI: 10.1098/rsta.2019.0539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
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Gschwendtner E, Turner M, Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Batsch F, Bracco C, Braunmüller F, Burger S, Burt G, Buttenschön B, Caldwell A, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Goddard B, Gorgisyan I, Gorn AA, Granados E, Grulke O, Hartin A, Helm A, Henderson JR, Hüther M, Ibison M, Jolly S, Keeble F, Kelisani MD, Kim SY, Kraus F, Krupa M, Lefevre T, Li Y, Liu S, Lopes N, Lotov KV, Martyanov M, Mazzoni S, Minakov VA, Molendijk JC, Moody JT, Moreira M, Muggli P, Panuganti H, Pardons A, Peña Asmus F, Perera A, Petrenko A, Pukhov A, Rey S, Sherwood P, Silva LO, Sosedkin AP, Tuev PV, Velotti F, Verra L, Verzilov VA, Vieira J, Welsch CP, Wendt M, Williamson B, Wing M, Woolley B, Xia G. Proton-driven plasma wakefield acceleration in AWAKE. Philos Trans A Math Phys Eng Sci 2019; 377:20180418. [PMID: 31230571 PMCID: PMC6602911 DOI: 10.1098/rsta.2018.0418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/25/2019] [Indexed: 06/09/2023]
Abstract
In this article, we briefly summarize the experiments performed during the first run of the Advanced Wakefield Experiment, AWAKE, at CERN (European Organization for Nuclear Research). The final goal of AWAKE Run 1 (2013-2018) was to demonstrate that 10-20 MeV electrons can be accelerated to GeV energies in a plasma wakefield driven by a highly relativistic self-modulated proton bunch. We describe the experiment, outline the measurement concept and present first results. Last, we outline our plans for the future. This article is part of the Theo Murphy meeting issue 'Directions in particle beam-driven plasma wakefield acceleration'.
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Affiliation(s)
| | | | - E. Adli
- University of Oslo, Oslo, Norway
| | | | - O. Apsimon
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
| | - R. Apsimon
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
| | - A.-M. Bachmann
- CERN, Geneva, Switzerland
- Max Planck Institute for Physics, Munich, Germany
- Technical University Munich, Munich, Germany
| | - F. Batsch
- CERN, Geneva, Switzerland
- Max Planck Institute for Physics, Munich, Germany
- Technical University Munich, Munich, Germany
| | | | | | | | - G. Burt
- Cockcroft Institute, Daresbury, UK
- Lancaster University, Lancaster, UK
| | - B. Buttenschön
- Max Planck Institute for Plasma Physics, Greifswald, Germany
| | - A. Caldwell
- Max Planck Institute for Physics, Munich, Germany
| | | | | | | | | | | | | | - A. Dexter
- Cockcroft Institute, Daresbury, UK
- Lancaster University, Lancaster, UK
| | | | - J. Farmer
- Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany
| | | | - R. Fiorito
- Cockcroft Institute, Daresbury, UK
- University of Liverpool, Liverpool, UK
| | - R. A. Fonseca
- ISCTE - Instituto Universitéario de Lisboa, Portugal
| | | | | | | | | | | | - A. A. Gorn
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | | | - O. Grulke
- Max Planck Institute for Plasma Physics, Greifswald, Germany
- Technical University of Denmark, Lyngby, Denmark
| | | | - A. Helm
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - J. R. Henderson
- Cockcroft Institute, Daresbury, UK
- Lancaster University, Lancaster, UK
| | - M. Hüther
- Max Planck Institute for Physics, Munich, Germany
| | - M. Ibison
- Cockcroft Institute, Daresbury, UK
- University of Liverpool, Liverpool, UK
| | | | | | | | | | - F. Kraus
- Philipps-Universität Marburg, Marburg, Germany
| | | | | | - Y. Li
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
| | - S. Liu
- TRIUMF, Vancouver, Canada
| | - N. Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - K. V. Lotov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - M. Martyanov
- Max Planck Institute for Physics, Munich, Germany
| | | | - V. A. Minakov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | | | - J. T. Moody
- Max Planck Institute for Physics, Munich, Germany
| | - M. Moreira
- CERN, Geneva, Switzerland
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - P. Muggli
- CERN, Geneva, Switzerland
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - F. Peña Asmus
- Max Planck Institute for Physics, Munich, Germany
- Technical University Munich, Munich, Germany
| | - A. Perera
- Cockcroft Institute, Daresbury, UK
- University of Liverpool, Liverpool, UK
| | - A. Petrenko
- CERN, Geneva, Switzerland
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - A. Pukhov
- Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany
| | - S. Rey
- CERN, Geneva, Switzerland
| | | | - L. O. Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - A. P. Sosedkin
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - P. V. Tuev
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | | | - L. Verra
- CERN, Geneva, Switzerland
- University of Milan, Milan, Italy
| | | | - J. Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - C. P. Welsch
- Cockcroft Institute, Daresbury, UK
- University of Liverpool, Liverpool, UK
| | | | - B. Williamson
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
| | | | | | - G. Xia
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
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Ahuja A. Point-of-care testing: Right sample in the right place, with the right result. Clin Chim Acta 2019. [DOI: 10.1016/j.cca.2019.03.688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Barrientos D, Barros MM, Batkiewicz J, Batsch F, Bauche J, Berglyd Olsen VK, Bernardini M, Biskup B, Boccardi A, Bogey T, Bohl T, Bracco C, Braunmüller F, Burger S, Burt G, Bustamante S, Buttenschön B, Caldwell A, Cascella M, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deacon L, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fior G, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Gorgisyan I, Gorn AA, Granados E, Grulke O, Gschwendtner E, Guerrero A, Hansen J, Helm A, Henderson JR, Hessler C, Hofle W, Hüther M, Ibison M, Jensen L, Jolly S, Keeble F, Kim SY, Kraus F, Lefevre T, LeGodec G, Li Y, Liu S, Lopes N, Lotov KV, Maricalva Brun L, Martyanov M, Mazzoni S, Medina Godoy D, Minakov VA, Mitchell J, Molendijk JC, Mompo R, Moody JT, Moreira M, Muggli P, Mutin C, Öz E, Ozturk E, Pasquino C, Pardons A, Peña Asmus F, Pepitone K, Perera A, Petrenko A, Pitman S, Plyushchev G, Pukhov A, Rey S, Rieger K, Ruhl H, Schmidt JS, Shalimova IA, Shaposhnikova E, Sherwood P, Silva LO, Soby L, Sosedkin AP, Speroni R, Spitsyn RI, Tuev PV, Turner M, Velotti F, Verra L, Verzilov VA, Vieira J, Vincke H, Welsch CP, Williamson B, Wing M, Woolley B, Xia G. Experimental Observation of Proton Bunch Modulation in a Plasma at Varying Plasma Densities. Phys Rev Lett 2019; 122:054802. [PMID: 30822008 DOI: 10.1103/physrevlett.122.054802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Indexed: 06/09/2023]
Abstract
We give direct experimental evidence for the observation of the full transverse self-modulation of a long, relativistic proton bunch propagating through a dense plasma. The bunch exits the plasma with a periodic density modulation resulting from radial wakefield effects. We show that the modulation is seeded by a relativistic ionization front created using an intense laser pulse copropagating with the proton bunch. The modulation extends over the length of the proton bunch following the seed point. By varying the plasma density over one order of magnitude, we show that the modulation frequency scales with the expected dependence on the plasma density, i.e., it is equal to the plasma frequency, as expected from theory.
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Affiliation(s)
- E Adli
- University of Oslo, 0316 Oslo, Norway
| | - A Ahuja
- CERN, 1211 Geneva, Switzerland
| | - O Apsimon
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - R Apsimon
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | - A-M Bachmann
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | | | | | - F Batsch
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | | | | | | | | | - T Bogey
- CERN, 1211 Geneva, Switzerland
| | - T Bohl
- CERN, 1211 Geneva, Switzerland
| | | | - F Braunmüller
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | - G Burt
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - B Buttenschön
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | | | - M Chung
- UNIST, 44919 Ulsan, Republic of Korea
| | - D Cooke
- UCL, WC1E 6BT London, United Kingdom
| | | | - L Deacon
- UCL, WC1E 6BT London, United Kingdom
| | - L H Deubner
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | - A Dexter
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - J Farmer
- Heinrich-Heine-University of Düsseldorf, 40225 Düsseldorf, Germany
| | | | - G Fior
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - R Fiorito
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - R A Fonseca
- ISCTE-Instituto Universitéario de Lisboa, 1649-026 Lisbon, Portugal
| | | | | | | | | | - A A Gorn
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - O Grulke
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
- Technical University of Denmark, 2800 Lyngby, Denmark
| | | | | | | | - A Helm
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - J R Henderson
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - W Hofle
- CERN, 1211 Geneva, Switzerland
| | - M Hüther
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - M Ibison
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | | | - S Jolly
- UCL, WC1E 6BT London, United Kingdom
| | - F Keeble
- UCL, WC1E 6BT London, United Kingdom
| | - S-Y Kim
- UNIST, 44919 Ulsan, Republic of Korea
| | - F Kraus
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | | | | | - Y Li
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - S Liu
- TRIUMF, V6T 2A3 Vancouver, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - K V Lotov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - M Martyanov
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | - V A Minakov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | - J Mitchell
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - R Mompo
- CERN, 1211 Geneva, Switzerland
| | - J T Moody
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - M Moreira
- CERN, 1211 Geneva, Switzerland
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - P Muggli
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - C Mutin
- CERN, 1211 Geneva, Switzerland
| | - E Öz
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | | | - F Peña Asmus
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | - A Perera
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - A Petrenko
- CERN, 1211 Geneva, Switzerland
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
| | - S Pitman
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - A Pukhov
- Heinrich-Heine-University of Düsseldorf, 40225 Düsseldorf, Germany
| | - S Rey
- CERN, 1211 Geneva, Switzerland
| | - K Rieger
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - H Ruhl
- Ludwig-Maximilians-Universität, 80539 Munich, Germany
| | | | - I A Shalimova
- Novosibirsk State University, 630090 Novosibirsk, Russia
- Institute of Computational Mathematics and Mathematical Geophysics SB RAS, 630090 Novosibirsk, Russia
| | | | | | - L O Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - L Soby
- CERN, 1211 Geneva, Switzerland
| | - A P Sosedkin
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - R I Spitsyn
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | - P V Tuev
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | | | - L Verra
- CERN, 1211 Geneva, Switzerland
- University of Milan, 20122 Milan, Italy
| | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | | | - C P Welsch
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - B Williamson
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - M Wing
- UCL, WC1E 6BT London, United Kingdom
| | | | - G Xia
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
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Turner M, Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Barros Marin M, Barrientos D, Batsch F, Batkiewicz J, Bauche J, Berglyd Olsen VK, Bernardini M, Biskup B, Boccardi A, Bogey T, Bohl T, Bracco C, Braunmüller F, Burger S, Burt G, Bustamante S, Buttenschön B, Caldwell A, Cascella M, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deacon L, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fior G, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Gorgisyan I, Gorn AA, Granados E, Grulke O, Gschwendtner E, Guerrero A, Hansen J, Helm A, Henderson JR, Hessler C, Hofle W, Hüther M, Ibison M, Jensen L, Jolly S, Keeble F, Kim SY, Kraus F, Lefevre T, LeGodec G, Li Y, Liu S, Lopes N, Lotov KV, Maricalva Brun L, Martyanov M, Mazzoni S, Medina Godoy D, Minakov VA, Mitchell J, Molendijk JC, Mompo R, Moody JT, Moreira M, Muggli P, Öz E, Ozturk E, Mutin C, Pasquino C, Pardons A, Peña Asmus F, Pepitone K, Perera A, Petrenko A, Pitman S, Plyushchev G, Pukhov A, Rey S, Rieger K, Ruhl H, Schmidt JS, Shalimova IA, Shaposhnikova E, Sherwood P, Silva LO, Soby L, Sosedkin AP, Speroni R, Spitsyn RI, Tuev PV, Velotti F, Verra L, Verzilov VA, Vieira J, Vincke H, Welsch CP, Williamson B, Wing M, Woolley B, Xia G. Experimental Observation of Plasma Wakefield Growth Driven by the Seeded Self-Modulation of a Proton Bunch. Phys Rev Lett 2019; 122:054801. [PMID: 30822039 DOI: 10.1103/physrevlett.122.054801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Indexed: 06/09/2023]
Abstract
We measure the effects of transverse wakefields driven by a relativistic proton bunch in plasma with densities of 2.1×10^{14} and 7.7×10^{14} electrons/cm^{3}. We show that these wakefields periodically defocus the proton bunch itself, consistently with the development of the seeded self-modulation process. We show that the defocusing increases both along the bunch and along the plasma by using time resolved and time-integrated measurements of the proton bunch transverse distribution. We evaluate the transverse wakefield amplitudes and show that they exceed their seed value (<15 MV/m) and reach over 300 MV/m. All these results confirm the development of the seeded self-modulation process, a necessary condition for external injection of low energy and acceleration of electrons to multi-GeV energy levels.
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Affiliation(s)
| | - E Adli
- University of Oslo, 0316 Oslo, Norway
| | - A Ahuja
- CERN, 1211 Geneva, Switzerland
| | - O Apsimon
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - R Apsimon
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | - A-M Bachmann
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | | | - F Batsch
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | | | | | | | | | | | - T Bogey
- CERN, 1211 Geneva, Switzerland
| | - T Bohl
- CERN, 1211 Geneva, Switzerland
| | | | - F Braunmüller
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | - G Burt
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - B Buttenschön
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | | | - M Chung
- UNIST, 44919 Ulsan, Republic of Korea
| | - D Cooke
- UCL, WC1E 6BT London, United Kingdom
| | | | - L Deacon
- UCL, WC1E 6BT London, United Kingdom
| | - L H Deubner
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | - A Dexter
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - J Farmer
- Heinrich-Heine-University of Düsseldorf, 40225 Düsseldorf, Germany
| | | | - G Fior
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - R Fiorito
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - R A Fonseca
- ISCTE-Instituto Universitéario de Lisboa, 1649-026 Lisbon, Portugal
| | | | | | | | | | - A A Gorn
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - O Grulke
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
- Technical University of Denmark, 2800 Lyngby, Denmark
| | | | | | | | - A Helm
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - J R Henderson
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - W Hofle
- CERN, 1211 Geneva, Switzerland
| | - M Hüther
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - M Ibison
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | | | - S Jolly
- UCL, WC1E 6BT London, United Kingdom
| | - F Keeble
- UCL, WC1E 6BT London, United Kingdom
| | - S-Y Kim
- UNIST, 44919 Ulsan, Republic of Korea
| | - F Kraus
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | | | | | - Y Li
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - S Liu
- TRIUMF, V6T 2A3 Vancouver, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - K V Lotov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - M Martyanov
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | - V A Minakov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | - J Mitchell
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - R Mompo
- CERN, 1211 Geneva, Switzerland
| | - J T Moody
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - M Moreira
- CERN, 1211 Geneva, Switzerland
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - P Muggli
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - E Öz
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | - C Mutin
- CERN, 1211 Geneva, Switzerland
| | | | | | - F Peña Asmus
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | - A Perera
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - A Petrenko
- CERN, 1211 Geneva, Switzerland
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
| | - S Pitman
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | - G Plyushchev
- CERN, 1211 Geneva, Switzerland
- Swiss Plasma Center, EPFL, 1015 Lausanne, Switzerland
| | - A Pukhov
- Heinrich-Heine-University of Düsseldorf, 40225 Düsseldorf, Germany
| | - S Rey
- CERN, 1211 Geneva, Switzerland
| | - K Rieger
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - H Ruhl
- Ludwig-Maximilians-Universität, 80539 Munich, Germany
| | | | - I A Shalimova
- Novosibirsk State University, 630090 Novosibirsk, Russia
- Institute of Computational Mathematics and Mathematical Geophysics SB RAS, 630090 Novosibirsk, Russia
| | | | | | - L O Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - L Soby
- CERN, 1211 Geneva, Switzerland
| | - A P Sosedkin
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - R I Spitsyn
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | - P V Tuev
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - L Verra
- CERN, 1211 Geneva, Switzerland
- University of Milan, 20122 Milan, Italy
| | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | | | - C P Welsch
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - B Williamson
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - M Wing
- UCL, WC1E 6BT London, United Kingdom
| | | | - G Xia
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
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Adhau R, Angrish P, Ahuja A, Singh Sandhu A. Multiple muscle tear after fall on buttock-role of conservative management and exercise for early recovery and return to play. Muscles Ligaments Tendons J 2019. [DOI: 10.32098/mltj.02.2014.11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- R. Adhau
- Department of Sports and Exercise Medicine, Sports Medicine Centre, Pune, India
| | - P. Angrish
- Sports Medicine Spl AMC Centre and College, Lucknow, India
| | - A. Ahuja
- Department of Sports Medicine NSNIS, Patiala, India
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11
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Gupta A, Sardana K, Ahuja A, Kishan Gautam R. Complete cure of a large complex cutaneous leishmaniasis with a nonethanolic lipid based-amphotericin B gel. Clin Exp Dermatol 2018; 44:807-810. [PMID: 30592076 DOI: 10.1111/ced.13883] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2018] [Indexed: 11/29/2022]
Affiliation(s)
- A Gupta
- Department of Dermatology, PGIMER and Dr Ram Manohar Lohia Hospital, New Delhi, India
| | - K Sardana
- Department of Dermatology, PGIMER and Dr Ram Manohar Lohia Hospital, New Delhi, India
| | - A Ahuja
- Department of Pathology, PGIMER and Dr Ram Manohar Lohia Hospital, New Delhi, India
| | - R Kishan Gautam
- Department of Dermatology, PGIMER and Dr Ram Manohar Lohia Hospital, New Delhi, India
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12
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Gupta A, Khurana A, Ahuja A, Gautam RK. Description of a new pigmentary demarcation line (Type I). Clin Exp Dermatol 2018; 44:e145-e146. [PMID: 30267432 DOI: 10.1111/ced.13787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/18/2018] [Indexed: 11/27/2022]
Affiliation(s)
- A Gupta
- Department of Dermatology, Dr Ram Manohar Lohia Hospital, New Delhi, India
| | - A Khurana
- Department of Dermatology, Dr Ram Manohar Lohia Hospital, New Delhi, India
| | - A Ahuja
- Department ofPathology, Dr Ram Manohar Lohia Hospital, New Delhi, India
| | - R K Gautam
- Department of Dermatology, Dr Ram Manohar Lohia Hospital, New Delhi, India
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13
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Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Barrientos D, Batsch F, Bauche J, Berglyd Olsen VK, Bernardini M, Bohl T, Bracco C, Braunmüller F, Burt G, Buttenschön B, Caldwell A, Cascella M, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deacon L, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Gorgisyan I, Gorn AA, Granados E, Grulke O, Gschwendtner E, Hansen J, Helm A, Henderson JR, Hüther M, Ibison M, Jensen L, Jolly S, Keeble F, Kim SY, Kraus F, Li Y, Liu S, Lopes N, Lotov KV, Maricalva Brun L, Martyanov M, Mazzoni S, Medina Godoy D, Minakov VA, Mitchell J, Molendijk JC, Moody JT, Moreira M, Muggli P, Öz E, Pasquino C, Pardons A, Peña Asmus F, Pepitone K, Perera A, Petrenko A, Pitman S, Pukhov A, Rey S, Rieger K, Ruhl H, Schmidt JS, Shalimova IA, Sherwood P, Silva LO, Soby L, Sosedkin AP, Speroni R, Spitsyn RI, Tuev PV, Turner M, Velotti F, Verra L, Verzilov VA, Vieira J, Welsch CP, Williamson B, Wing M, Woolley B, Xia G. Acceleration of electrons in the plasma wakefield of a proton bunch. Nature 2018; 561:363-367. [PMID: 30188496 PMCID: PMC6786972 DOI: 10.1038/s41586-018-0485-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 08/14/2018] [Indexed: 12/03/2022]
Abstract
High-energy particle accelerators have been crucial in providing a deeper understanding of fundamental particles and the forces that govern their interactions. To increase the energy of the particles or to reduce the size of the accelerator, new acceleration schemes need to be developed. Plasma wakefield acceleration1–5, in which the electrons in a plasma are excited, leading to strong electric fields (so called ‘wakefields’), is one such promising acceleration technique. Experiments have shown that an intense laser pulse6–9 or electron bunch10,11 traversing a plasma can drive electric fields of tens of gigavolts per metre and above—well beyond those achieved in conventional radio-frequency accelerators (about 0.1 gigavolt per metre). However, the low stored energy of laser pulses and electron bunches means that multiple acceleration stages are needed to reach very high particle energies5,12. The use of proton bunches is compelling because they have the potential to drive wakefields and to accelerate electrons to high energy in a single acceleration stage13. Long, thin proton bunches can be used because they undergo a process called self-modulation14–16, a particle–plasma interaction that splits the bunch longitudinally into a series of high-density microbunches, which then act resonantly to create large wakefields. The Advanced Wakefield (AWAKE) experiment at CERN17–19 uses high-intensity proton bunches—in which each proton has an energy of 400 gigaelectronvolts, resulting in a total bunch energy of 19 kilojoules—to drive a wakefield in a ten-metre-long plasma. Electron bunches are then injected into this wakefield. Here we present measurements of electrons accelerated up to two gigaelectronvolts at the AWAKE experiment, in a demonstration of proton-driven plasma wakefield acceleration. Measurements were conducted under various plasma conditions and the acceleration was found to be consistent and reliable. The potential for this scheme to produce very high-energy electron bunches in a single accelerating stage20 means that our results are an important step towards the development of future high-energy particle accelerators21,22. Electron acceleration to very high energies is achieved in a single step by injecting electrons into a ‘wake’ of charge created in a 10-metre-long plasma by speeding long proton bunches.
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Affiliation(s)
- E Adli
- University of Oslo, Oslo, Norway
| | | | - O Apsimon
- University of Manchester, Manchester, UK.,Cockcroft Institute, Daresbury, UK
| | - R Apsimon
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | - A-M Bachmann
- CERN, Geneva, Switzerland.,Max Planck Institute for Physics, Munich, Germany.,Technical University Munich, Munich, Germany
| | | | - F Batsch
- CERN, Geneva, Switzerland.,Max Planck Institute for Physics, Munich, Germany.,Technical University Munich, Munich, Germany
| | | | | | | | - T Bohl
- CERN, Geneva, Switzerland
| | | | | | - G Burt
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | - B Buttenschön
- Max Planck Institute for Plasma Physics, Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, Munich, Germany
| | | | | | | | | | | | | | | | - L H Deubner
- Philipps-Universität Marburg, Marburg, Germany
| | - A Dexter
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | | | - J Farmer
- Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany
| | | | - R Fiorito
- Cockcroft Institute, Daresbury, UK.,University of Liverpool, Liverpool, UK
| | - R A Fonseca
- ISCTE-Instituto Universitéario de Lisboa, Lisbon, Portugal
| | | | | | | | | | - A A Gorn
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | | | - O Grulke
- Max Planck Institute for Plasma Physics, Greifswald, Germany.,Technical University of Denmark, Lyngby, Denmark
| | | | | | - A Helm
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - J R Henderson
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | - M Hüther
- Max Planck Institute for Physics, Munich, Germany
| | - M Ibison
- Cockcroft Institute, Daresbury, UK.,University of Liverpool, Liverpool, UK
| | | | | | | | | | - F Kraus
- Philipps-Universität Marburg, Marburg, Germany
| | - Y Li
- University of Manchester, Manchester, UK.,Cockcroft Institute, Daresbury, UK
| | - S Liu
- TRIUMF, Vancouver, British Columbia, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - K V Lotov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | | | - M Martyanov
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - V A Minakov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | - J Mitchell
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | | | - J T Moody
- Max Planck Institute for Physics, Munich, Germany
| | - M Moreira
- CERN, Geneva, Switzerland.,GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - P Muggli
- CERN, Geneva, Switzerland.,Max Planck Institute for Physics, Munich, Germany
| | - E Öz
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - F Peña Asmus
- Max Planck Institute for Physics, Munich, Germany.,Technical University Munich, Munich, Germany
| | | | - A Perera
- Cockcroft Institute, Daresbury, UK.,University of Liverpool, Liverpool, UK
| | - A Petrenko
- CERN, Geneva, Switzerland.,Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - S Pitman
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | - A Pukhov
- Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany
| | - S Rey
- CERN, Geneva, Switzerland
| | - K Rieger
- Max Planck Institute for Physics, Munich, Germany
| | - H Ruhl
- Ludwig-Maximilians-Universität, Munich, Germany
| | | | - I A Shalimova
- Novosibirsk State University, Novosibirsk, Russia.,Institute of Computational Mathematics and Mathematical Geophysics SB RAS, Novosibirsk, Russia
| | | | - L O Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - L Soby
- CERN, Geneva, Switzerland
| | - A P Sosedkin
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | | | - R I Spitsyn
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | - P V Tuev
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | | | | | - L Verra
- CERN, Geneva, Switzerland.,University of Milan, Milan, Italy
| | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - C P Welsch
- Cockcroft Institute, Daresbury, UK.,University of Liverpool, Liverpool, UK
| | - B Williamson
- University of Manchester, Manchester, UK.,Cockcroft Institute, Daresbury, UK
| | | | | | - G Xia
- University of Manchester, Manchester, UK.,Cockcroft Institute, Daresbury, UK
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14
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Affiliation(s)
- V Ahuja
- M.D.S, Senior Lecturer, Department of Pedodontics & Preventive Dentistry
| | - A Ahuja
- M.D.S, Senior, Department of Periodontics & Implant Dentistry, Sharad Pawar Dental College and Hospital, Wardha, Maharashtra, India
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15
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Amjad H, Ahuja A, Wolff J, Lyketsos C, Samus Q, Roth D. PATTERNS AND DISPARITIES IN FORMAL DEMENTIA DIAGNOSIS AND AWARENESS OF DIAGNOSIS. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.3341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- H. Amjad
- Johns Hopkins University School of Medicine, Baltimore, Maryland,
| | - A. Ahuja
- Johns Hopkins University School of Medicine, Baltimore, Maryland,
- Center on Aging and Health, Johns Hopkins University, Baltimore, Maryland,
| | - J.L. Wolff
- Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland
- Center on Aging and Health, Johns Hopkins University, Baltimore, Maryland,
| | - C.G. Lyketsos
- Johns Hopkins University School of Medicine, Baltimore, Maryland,
| | - Q. Samus
- Johns Hopkins University School of Medicine, Baltimore, Maryland,
| | - D.L. Roth
- Johns Hopkins University School of Medicine, Baltimore, Maryland,
- Center on Aging and Health, Johns Hopkins University, Baltimore, Maryland,
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16
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Hui E, Ma B, Mo F, Kam M, Chan S, Loong H, Ho R, Leung S, King A, Wang K, Ahuja A, Chan C, Hui C, Wong C, Chan A. Axitinib in recurrent or metastatic nasopharyngeal carcinoma (NPC): final result of a phase 2 clinical trial with pharmacokinetic (PK) correlation. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw376.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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17
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Vise E, Das S, Garg A, Karam A, Ghatak S, Sen A, Shakuntala I, Puro K, Sanjukta R, Ahuja A, Bhattacharjee U, Kakoty K, Sharma N. Isolation and identification of a novel Non-tuberculous Mycobacterium species of canine origin by multiple gene sequencing approach. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.884] [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: 11/24/2022] Open
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18
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Robinson MJF, Fischer AM, Ahuja A, Lesser EN, Maniates H. Roles of "Wanting" and "Liking" in Motivating Behavior: Gambling, Food, and Drug Addictions. Curr Top Behav Neurosci 2016; 27:105-136. [PMID: 26407959 DOI: 10.1007/7854_2015_387] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The motivation to seek out and consume rewards has evolutionarily been driven by the urge to fulfill physiological needs. However in a modern society dominated more by plenty than scarcity, we tend to think of motivation as fueled by the search for pleasure. Here, we argue that two separate but interconnected subcortical and unconscious processes direct motivation: "wanting" and "liking." These two psychological and neuronal processes and their related brain structures typically work together, but can become dissociated, particularly in cases of addiction. In drug addiction, for example, repeated consumption of addictive drugs sensitizes the mesolimbic dopamine system, the primary component of the "wanting" system, resulting in excessive "wanting" for drugs and their cues. This sensitizing process is long-lasting and occurs independently of the "liking" system, which typically remains unchanged or may develop a blunted pleasure response to the drug. The result is excessive drug-taking despite minimal pleasure and intense cue-triggered craving that may promote relapse long after detoxification. Here, we describe the roles of "liking" and "wanting" in general motivation and review recent evidence for a dissociation of "liking" and "wanting" in drug addiction, known as the incentive sensitization theory (Robinson and Berridge 1993). We also make the case that sensitization of the "wanting" system and the resulting dissociation of "liking" and "wanting" occurs in both gambling disorder and food addiction.
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Affiliation(s)
- M J F Robinson
- Department of Psychology, Wesleyan University, 207 High Street, Judd Hall, Middletown, CT, 06459, USA.
| | - A M Fischer
- Department of Psychology, Wesleyan University, 207 High Street, Judd Hall, Middletown, CT, 06459, USA
| | - A Ahuja
- Department of Psychology, Wesleyan University, 207 High Street, Judd Hall, Middletown, CT, 06459, USA
| | - E N Lesser
- Department of Psychology, Wesleyan University, 207 High Street, Judd Hall, Middletown, CT, 06459, USA
| | - H Maniates
- Department of Psychology, Wesleyan University, 207 High Street, Judd Hall, Middletown, CT, 06459, USA
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19
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Chaudhary P, Bhadana U, Singh RAK, Ahuja A. Primary hepatic angiosarcoma. Eur J Surg Oncol 2015; 41:1137-43. [PMID: 26008857 DOI: 10.1016/j.ejso.2015.04.022] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [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: 10/08/2014] [Revised: 04/22/2015] [Accepted: 04/27/2015] [Indexed: 02/07/2023] Open
Abstract
Primary hepatic angiosarcoma is a rare, aggressive tumor; composed of spindle or pleomorphic cells that line, or grow into, the lumina of pre-existing vascular spaces like sinusoids and terminal hepatic venules; with only about 200 cases diagnosed annually worldwide but it is the most common primary malignant mesenchymal tumor of the liver in adults and accounts for 2% of all primary hepatic malignancies. HAS occurs in association with known chemical carcinogens, but 75% of the tumors have no known etiology. Patients present with vague symptoms like abdominal pain, weight loss, fatigue or an abdominal mass. Hepatic angiosarcoma is usually multicentric and involves both lobes, entire liver may also found to be involved. CD31 is the most reliable marker. These tumors lack specific features on imaging, so, pathological diagnosis is necessary. There are no established treatment guidelines because of low frequency and aggressive nature of tumor, chemotherapy is only palliative, liver resection is indicated for solitary mass and liver transplant is contraindicated. The aim of this article is to comprehensively review all the available literature and to present detailed information and an update on primary hepatic angiosarcoma.
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Affiliation(s)
- P Chaudhary
- Lady Hardinge Medical College and Associated Dr Ram Manohar Lohia Hospital, New Delhi, India.
| | - U Bhadana
- Lady Hardinge Medical College and Associated Dr Ram Manohar Lohia Hospital, New Delhi, India
| | - R A K Singh
- Dr Ram Manohar Lohia Hospital, New Delhi, India
| | - A Ahuja
- Department of Pathology, Dr Ram Manohar Lohia Hospital, New Delhi, India
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20
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Singh V, Bhakta P, Ahuja A. Epidural catheter knot immediately after catheter insertion. Anaesth Intensive Care 2015; 43:280-281. [PMID: 25735704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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21
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Kiernan F, Ahuja A. Airway management of low tracheal rupture. Anaesth Intensive Care 2015; 43:134-135. [PMID: 25579304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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22
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Srivastava A, Koul V, Dwivedi SN, Upadhyaya AD, Ahuja A, Saxena R. Performance analysis of newly developed point-of-care hemoglobinometer (TrueHb) against an automated hematology analyzer (Sysmex XT 1800i) in terms of precision in hemoglobin measurement. Int J Lab Hematol 2014; 37:483-5. [PMID: 25418886 DOI: 10.1111/ijlh.12314] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 02/22/2014] [Accepted: 10/13/2014] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The aim of this study was to evaluate the performance of the newly developed handheld hemoglobinmeter (TrueHb) by comparing its performance against and an automated five-part hematology analyzer, Sysmex counter XT 1800i (Sysmex). METHODS Two hundred venous blood samples were subjected through their total hemoglobin evaluation on each device three times. The average of the three readings on each device was considered as their respective device values, that is, TrueHb values and Sysmex values. The two set of values were comparatively analyzed. The repeatability of the performance of TrueHb was also evaluated against Sysmex values. RESULTS The scatter plot of TrueHb values and Sysmex values showed linear distribution with positive correlations (r = 0.99). The intraclass correlation (ICC) values between the two set of values was found to be 0.995. Regression coefficients through origin, β, was found to be 0.995, with 95% confidence intervals (CI) ranging between 0.9900 and 1.0000. The mean difference in Bland-Altman plots of TrueHb values against the Sysmex values was found to be -0.02, with limits of agreement between -0.777 and 0.732 g/dL. Statistical analysis suggested good repeatability in results of TrueHb, having a low mean CV of 2.22, against 4.44, that of Sysmex values, and 95% confidence interval of 1.99-2.44, against 3.85-5.03, that of Sysmex values. CONCLUSION These results suggested a strong positive correlation between the two measurements devices. It is thus concluded that TrueHb is a good point-of-care testing tool for estimating hemoglobin.
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Affiliation(s)
- A Srivastava
- Technology Business Incubation Unit, Indian Institute of Technology - Delhi, New Delhi, India
| | - V Koul
- Centre for Biomedical Engineering, Indian Institute of Technology - Delhi, New Delhi, India
| | - S N Dwivedi
- Department of Biostatistics, All India Institute of Medical Sciences, New Delhi, India
| | - A D Upadhyaya
- Department of Biostatistics, All India Institute of Medical Sciences, New Delhi, India
| | - A Ahuja
- Department of Hematology, All India Institute of Medical Sciences, New Delhi, India
| | - R Saxena
- Department of Hematology, All India Institute of Medical Sciences, New Delhi, India
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Kataria A, Ahuja A, Taneja A, Chanan N, Mangat GS. Economic Implications Of Chronic Renal Disease With And Without Co-Morbid Diabetes In China, Post-2005. Value Health 2014; 17:A744. [PMID: 27202685 DOI: 10.1016/j.jval.2014.08.157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- A Kataria
- HERON™Commercialization, PAREXEL Consulting, PAREXEL International, Chandigarh, India
| | - A Ahuja
- HERON Health Pvt. Ltd., Chandigarh, India
| | - A Taneja
- HERON™Commercialization, PAREXEL Consulting, PAREXEL International, Chandigarh, India
| | - N Chanan
- HERON™Commercialization, PAREXEL Consulting, PAREXEL International, Chandigarh, India
| | - G S Mangat
- HERON™Commercialization, PAREXEL Consulting, PAREXEL International, Chandigarh, India
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Ahuja A, Gupta R, Sharma A, Bagga A, Bhowmik DM, Agarwal SK, Dinda AK. Idiopathic collapsing glomerulopathy: A clinicopathologic analysis of 30 cases. Indian J Nephrol 2014; 24:239-42. [PMID: 25097337 PMCID: PMC4119337 DOI: 10.4103/0971-4065.133009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Collapsing glomerulopathy (CG) is a distinct clinicopathologic entity associated with various infections, medications and acute ischemia. There have been few scattered reports of CG from India. This study aimed at evaluating the clinicopathologic features of idiopathic CG in Indian patients with comparison between adult-onset and childhood CG. This study included all cases of idiopathic CG diagnosed over a period of 4 years (2006-2009). Appropriate clinical details and laboratory findings were retrieved. Renal biopsies were reviewed and detailed pathologic features assessed. Statistical analysis was performed to compare various features between adult-onset and childhood CG. Over these 4 years, 30 cases of idiopathic CG were diagnosed. Of these, 11 were children. Childhood CG cases had longer duration of symptoms and lower serum urea and creatinine levels compared with adult patients. In renal histology, tubular atrophy and interstitial fibrosis was frequent in our cases. Pediatric cases of CG showed a higher proportion of segmental glomerulosclerosis. On clinical follow-up, nine of the 30 patients progressed to end-stage renal disease and these included two pediatric patients. Idiopathic CG is a significant cause of renal dysfunction in both pediatric and adult patients. Childhood and adult-onset CG differ in few clinicopathologic features. Early and accurate diagnosis of CG is imperative for appropriate management of these patients.
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Affiliation(s)
- A Ahuja
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - R Gupta
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - A Sharma
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - A Bagga
- Department of Paediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - D M Bhowmik
- Department of Nephrology, All India Institute of Medical Sciences, New Delhi, India
| | - S K Agarwal
- Department of Nephrology, All India Institute of Medical Sciences, New Delhi, India
| | - A K Dinda
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
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Sen A, Saravanan P, Balamurugan V, Bhanuprakash V, Venkatesan G, Sarkar J, Rajak KK, Ahuja A, Yadav V, Sudhakar SB, Parida S, Singh RK. Detection of subclinical peste des petits ruminants virus infection in experimental cattle. Virusdisease 2014; 25:408-11. [PMID: 25674614 DOI: 10.1007/s13337-014-0213-0] [Citation(s) in RCA: 20] [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] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Accepted: 04/05/2014] [Indexed: 11/29/2022] Open
Abstract
The present study was undertaken to investigate the possible involvement of cattle in the epidemiology of peste des petits ruminants (PPR) as subclinical carriers. Cattle were exposed experimentally to PPR virus (PPRV) infection or placed in contact with PPR infected goats. Clinical samples including heparinized/EDTA blood, plasma, peripheral blood monocyte cells (PBMCs) and clotted blood (for serum) were collected periodically from 21 days post infection (dpi) to 397 dpi (21, 45, 50, 57, 65, 95, 111, 119, 148, 190, 203 and 397 dpi) and tested for PPRV antigen, nucleic acid and antibody. Exposed cattle seroconverted and maintained PPRV specific haemagglutinin antibodies and detectable PPRV antigen/nucleic acid in blood, plasma and PBMCs from 21 to 397 dpi. PPRV was recovered from blood and PBMC collected from experimental animals at 21 dpi, initially in B95a cells and then adapted to Vero cells. The study indicated that PPRV can infect cattle subclinically and PPRV antigen/nucleic acid persist in cattle for at least 397 days.
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Affiliation(s)
- A Sen
- Division of Virology, Indian Veterinary Research Institute, Campus Mukteswar, Nainital District, 263 138 Uttarakhand India ; Animal Health Division, Indian Council of Agricultural Research-North Eastern Hill Region, Meghalaya, 793103 India
| | - P Saravanan
- Division of Virology, Indian Veterinary Research Institute, Campus Mukteswar, Nainital District, 263 138 Uttarakhand India ; Indian Veterinary Research Institute, Bangalore Campus, Bangalore, 560 024 Karnataka India
| | - V Balamurugan
- Division of Virology, Indian Veterinary Research Institute, Campus Mukteswar, Nainital District, 263 138 Uttarakhand India ; National Institute of Veterinary Epidemiology and Disease Informatics (NIVEDI), Formerly Project Directorate on Animal Disease Monitoring and Surveillance (PD_ADMAS), Hebbal, Bangalore, 560 024 Karnataka India
| | - V Bhanuprakash
- Division of Virology, Indian Veterinary Research Institute, Campus Mukteswar, Nainital District, 263 138 Uttarakhand India ; Indian Veterinary Research Institute, Bangalore Campus, Bangalore, 560 024 Karnataka India
| | - G Venkatesan
- Division of Virology, Indian Veterinary Research Institute, Campus Mukteswar, Nainital District, 263 138 Uttarakhand India
| | - J Sarkar
- Division of Virology, Indian Veterinary Research Institute, Campus Mukteswar, Nainital District, 263 138 Uttarakhand India
| | - K K Rajak
- Division of Virology, Indian Veterinary Research Institute, Campus Mukteswar, Nainital District, 263 138 Uttarakhand India
| | - A Ahuja
- Division of Virology, Indian Veterinary Research Institute, Campus Mukteswar, Nainital District, 263 138 Uttarakhand India
| | - V Yadav
- Division of Virology, Indian Veterinary Research Institute, Campus Mukteswar, Nainital District, 263 138 Uttarakhand India
| | - S B Sudhakar
- Division of Virology, Indian Veterinary Research Institute, Campus Mukteswar, Nainital District, 263 138 Uttarakhand India
| | - S Parida
- Institute for Animal Health, Pirbright Laboratory, Woking, Surrey UK
| | - R K Singh
- Division of Virology, Indian Veterinary Research Institute, Campus Mukteswar, Nainital District, 263 138 Uttarakhand India ; National Research Centre on Equines, Sirsa Road, Hisar, 125 001 Haryana India
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Dubal Z, Mawlong M, Susngi B, Sanjukta R, Puro K, Ghatak S, Sen A, Shakuntala I, Barbuddhe S, Ahuja A, Bhattacharjee U. Comparison of agarose gel electrophoresis and RNA-PAGE for rapid detection of rotavirus from faecal samples. Journal of Applied Animal Research 2014. [DOI: 10.1080/09712119.2014.896262] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Qureshi MJ, Ali J, Baboota S, Ahuja A, Mallikarjun C. Pharmacokinetic Study of a Capsule-based Chronomodulated Drug Delivery System of Salbutamol Sulphate in Rabbits. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Qureshi MJ, Ali J, Baboota S, Ahuja A, Mallikarjun C. Pharmacokinetic Study of a Capsule-based Chronomodulated Drug Delivery System of Salbutamol Sulphate in Rabbits. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i1.3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Ghatak S, Singha A, Sen A, Guha C, Ahuja A, Bhattacharjee U, Das S, Pradhan NR, Puro K, Jana C, Dey TK, Prashantkumar KL, Das A, Shakuntala I, Biswas U, Jana PS. Detection of New Delhi metallo-beta-lactamase and extended-spectrum beta-lactamase genes in Escherichia coli isolated from mastitic milk samples. Transbound Emerg Dis 2013; 60:385-9. [PMID: 23870003 DOI: 10.1111/tbed.12119] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Indexed: 01/09/2023]
Abstract
In this study, eight Escherichia coli isolates were obtained from milk samples of dairy cattle suffering from clinical/subclinical mastitis. Isolates were characterized for antimicrobial resistance traits and virulence genes. Results revealed that one isolate was harbouring New Delhi metallo-beta-lactamase gene (blaNDM ). Cloning and sequencing of the PCR amplicon confirmed the identity of the gene (GenBank accession no. KC769583) having 100% homology with blaNDM-5 (GenBank accession no. JN104597.1), and this isolate was susceptible to colistin, chloramphenicol and tetracycline only. Moreover, another isolate carried extended-spectrum beta-lactamase (ESBL) gene - blaCTX-M , and all isolates possessed blaTEM gene. Of the eight isolates, only one isolate was positive for shiga toxin gene (stx2), and none were harbouring stx1 gene. Occurrence of New Delhi metallo-beta-lactamase (blaNDM ) in one E. coli isolate and ESBL genes in other isolates poses a potential threat to human health following possible entry and spread through food chain.
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Affiliation(s)
- S Ghatak
- Division of Animal Health, ICAR Research Complex for NEH Region, Umiam, India.
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Qureshi J, Ali J, Baboota S, Ahuja A, Mallikarjun C. Development and Evaluation of Chronotherapeutic Drug Delivery System for the Management of Nocturnal Asthma. TROP J PHARM RES 2013. [DOI: 10.4314/tjpr.v11i5.2] [Citation(s) in RCA: 3] [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: 11/17/2022] Open
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Ahuja A, Sen A, Yogisharadhya R, Rajak KK, Shivachandra SB. Prokaryotic expression and purification of highly soluble partial glycoprotein erns of Indian strain of classical Swine Fever virus. Indian J Virol 2012; 23:397-401. [PMID: 24293833 DOI: 10.1007/s13337-012-0110-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Accepted: 08/29/2012] [Indexed: 11/29/2022]
Abstract
Classical swine fever (CSF) or hog cholera, caused by a positive stranded RNA virus belonging to the genus Pestivirus of the Flaviviridae family, is highly contagious and fatal disease of pigs. We report the novel design of construct for production of highly soluble glycoprotein Erns fragment using prokaryotic expression system. A truncated fragment of the Erns gene (coding for aa 109-170) denoted as 'Erns-Ag' was subcloned and expressed as hexa-histidine tag fusion on both terminus of protein in Escherichia coli. The highly soluble recombinant Erns-Ag protein with purity >95 % was purified by one step Ni-NTA affinity chromatography under native condition. Anti Erns-Ag polyclonal antibodies raised in guinea pig was found to react with CSFV antigen in infected MDCK cell line during immunoperoxidase test. The described methodology of producing a highly soluble recombinant protein with native conformation would likely to assist in development of differential diagnostic test as well as its application in raising hyperimmune sera for detection of CSFV antigen either in tissue materials or infected cell lines.
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Affiliation(s)
- A Ahuja
- Division of Virology, Indian Veterinary Research Institute (IVRI), Regional Campus, Mukteswar, 263138 Nainital, Uttarakhand India
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Ma BBY, Kam MKM, Leung SF, Hui EP, King AD, Chan SL, Mo F, Loong H, Yu BKH, Ahuja A, Chan ATC. A phase II study of concurrent cetuximab-cisplatin and intensity-modulated radiotherapy in locoregionally advanced nasopharyngeal carcinoma. Ann Oncol 2012; 23:1287-1292. [PMID: 21948811 DOI: 10.1093/annonc/mdr401] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [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: 10/06/2023] Open
Abstract
BACKGROUND Based on our previous work on the clinical activity of cetuximab in recurrent nasopharyngeal carcinoma (NPC), we evaluated the feasibility of adding cetuximab to concurrent cisplatin and intensity-modulated radiotherapy (IMRT) in locoregionally advanced NPC. PATIENTS AND METHODS Patients with American Joint Committee on Cancer stage III-IVB NPC were given an initial dose of cetuximab (400 mg/m(2)) 7-10 days before receiving concurrent IMRT, weekly cisplatin (30 mg/m(2)/week) and cetuximab (250 mg/m(2)/week). RESULTS Thirty patients (median age of 45 years) with stage III (67%), IVA (30%) and IVB (3%) nonkeratinizing NPC were enrolled. Grade 3-4 oropharyngeal mucositis occurred in 26 (87%) patients and 10 (33%) patients required short-term nasogastric feeding. Grade 3 radiotherapy-related dermatitis occurred in six patients (20%) and three patients (10%) had grade 3 cetuximab-related acneiform rash. These grade 3-4 skin and mucosal toxic effects were manageable and reversible. At a median follow-up of 31.8 months [95% confidence interval (CI) 26.2-32.1 months], the 2-year progression-free survival was 86.5% (95% CI 74.3% to 98.8%). CONCLUSIONS Concurrent administration of cetuximab, weekly cisplatin and IMRT is a feasible strategy against locoregionally advanced NPC. Preliminary survival data compare favorably with historic data and further follow-up is warranted.
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Affiliation(s)
- B B Y Ma
- State Key Laboratory in Oncology in South China, Sir YK Pao Centre for Cancer, Department of Clinical Oncology, Hong Kong Cancer Institute. The Chinese University of Hong Kong.
| | - M K M Kam
- State Key Laboratory in Oncology in South China, Sir YK Pao Centre for Cancer, Department of Clinical Oncology, Hong Kong Cancer Institute. The Chinese University of Hong Kong
| | - S F Leung
- State Key Laboratory in Oncology in South China, Sir YK Pao Centre for Cancer, Department of Clinical Oncology, Hong Kong Cancer Institute. The Chinese University of Hong Kong
| | - E P Hui
- State Key Laboratory in Oncology in South China, Sir YK Pao Centre for Cancer, Department of Clinical Oncology, Hong Kong Cancer Institute. The Chinese University of Hong Kong
| | - A D King
- Imaging and Interventional Radiology, Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong, China
| | - S L Chan
- State Key Laboratory in Oncology in South China, Sir YK Pao Centre for Cancer, Department of Clinical Oncology, Hong Kong Cancer Institute. The Chinese University of Hong Kong
| | - F Mo
- State Key Laboratory in Oncology in South China, Sir YK Pao Centre for Cancer, Department of Clinical Oncology, Hong Kong Cancer Institute. The Chinese University of Hong Kong
| | - H Loong
- State Key Laboratory in Oncology in South China, Sir YK Pao Centre for Cancer, Department of Clinical Oncology, Hong Kong Cancer Institute. The Chinese University of Hong Kong
| | - B K H Yu
- State Key Laboratory in Oncology in South China, Sir YK Pao Centre for Cancer, Department of Clinical Oncology, Hong Kong Cancer Institute. The Chinese University of Hong Kong
| | - A Ahuja
- Imaging and Interventional Radiology, Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong, China
| | - A T C Chan
- State Key Laboratory in Oncology in South China, Sir YK Pao Centre for Cancer, Department of Clinical Oncology, Hong Kong Cancer Institute. The Chinese University of Hong Kong
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Ahuja A, Iyer VK, Mathur S, Vijay MK. Fine needle aspiration cytology diagnosis of metastatic adult granulosa cell tumour showing Call-Exner bodies. Cytopathology 2012; 24:346-7. [PMID: 22515425 DOI: 10.1111/j.1365-2303.2012.00980.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- A Ahuja
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
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Singhal G, Akhter MZ, Stern DF, Gupta SD, Ahuja A, Sharma U, Jagannathan NR, Rajeswari MR. DNA triplex-mediated inhibition of MET leads to cell death and tumor regression in hepatoma. Cancer Gene Ther 2011; 18:520-30. [PMID: 21660063 DOI: 10.1038/cgt.2011.21] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Mesenchymal epithelial transition factor (MET) is one of the critical cell signaling molecules whose aberrant expression is reported in several human cancers. The aim of the study is to investigate the antigene and antiproliferative effect of short triplex forming oligonucleotides, TFO-1 (part of the positive regulatory element) and TFO-2 (away from the transcription start site) on MET expression. HepG2 cells transfected only with TFO-1 (but not with TFO-2 and non-specific TFO) significantly decreased MET levels, which is accompanied by decrease in antiapoptotic proteins and increase in pro-apoptotic proteins. Phosphoproteome-array analysis of 46 intracellular kinases revealed hypophosphorylation of about 15 kinases including ERK, AKT, Src and MEK, suggesting the growth inhibitory effect of TFO-1. Further, the efficacy of TFO-1 was tested on diethylnitrosamine-induced liver tumors in wistar rats. T2-weighted magnetic resonance imaging showed decrease in liver tumor volume up to 90% after treatment with TFO-1. Decreased MET expression and elevated apoptotic activity further indicate that TFO-1 targeted to c-met leads to cell death and tumor regression in hepatoma. Formation of stable DNA triplex between TFO-1 and targeted gene sequence was confirmed by circular dichroic spectroscopy and gel retardation assay. Therefore, it can be concluded that DNA triplex-based therapeutic approaches hold promise in the treatment of malignancies associated with MET overexpression.
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Affiliation(s)
- G Singhal
- Department of Biochemistry, All India Institute of Medical Sciences, New Delhi, India
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Nandi S, Muthuchelvan D, Ahuja A, Bisht S, Chander V, Pandey AB, Singh RK. Prevalence of classical swine fever virus in India: a 6-year study (2004-2010). Transbound Emerg Dis 2011; 58:461-3. [PMID: 21429182 DOI: 10.1111/j.1865-1682.2011.01218.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
A study was undertaken regarding the prevalence of classical swine fever virus (CSFV) antibodies and antigens in sera and suspected tissue samples of domestic pigs. The samples were received between January 2004 and September 2010. A total of 594 serum samples from 12 states and 287 tissue samples from 13 states of India were tested using commercial enzyme-linked immunosorbent assay (ELISA) kits. The mean prevalence of CSFV antibodies in suspected sera was 63.3% (376/594), whereas 76.7% (220/287) of the suspected samples were found to contain CSFV antigen. The high prevalence of CSFV antibodies suggests that the disease is endemic in the country. This baseline data will be of use in the formulation of control and eradication programmes.
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Affiliation(s)
- S Nandi
- Centre for Animal Disease Research and Diagnosis (CADRAD), Indian Veterinary Research Institute (IVRI), Izatnagar, Bareilly, India.
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Pandita D, Ahuja A, Lather V, Dutta T, Velpandian T, Khar RK. Development, characterization and in vitro assessement of stearylamine-based lipid nanoparticles of paclitaxel. Pharmazie 2011; 66:171-177. [PMID: 21553646] [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: 05/30/2023]
Abstract
The objective of the study was to design and evaluate a solid lipid nanoparticle (SLN) drug delivery system for delivery of paclitaxel. Components of the SLN were lipid (stearylamine) and surfactants (Pluronic F68 and Soya lecithin). The paclitaxel loaded nanoparticles were prepared by a modified solvent injection method. Experiments were carried out with excipients, where surfactants, lipid and drug molar ratios were varied to optimize the formulation characteristics. The in vitro drug release profile from the nanoparticles followed a diffusion controlled mechanism. The modified solvent injection method ensured high entrapment efficiency (approximately 75%), produced smaller, stable nanoparticles with a narrow size distribution and proved to be a reproducible and fast production method. The present study describes the feasibility and suitability of stearylamine based SLN produced using a mixture of surfactants to develop a clinically useful system with targeting potential for poorly soluble antineoplastic drugs.
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Affiliation(s)
- D Pandita
- Department of Pharmaceutics, Faculty of Pharmacy, Jamia Hamdard, Hamdard University, New Delhi, India.
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Katoch M, Fazli IS, Suri KA, Ahuja A, Qazi GN. Effect of altitude on picroside content in core collections of Picrorhiza kurrooa from the north western Himalayas. J Nat Med 2011; 65:578-82. [PMID: 21347670 DOI: 10.1007/s11418-010-0491-9] [Citation(s) in RCA: 18] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Accepted: 10/27/2010] [Indexed: 11/25/2022]
Abstract
Picrorhiza kurrooa Royle ex Benth (Scrophulariaceae), commonly known as Kutki, is a major ingredient of many ayurvedic preparations prescribed in the treatment of various diseases. Picrosides I and II are the active agents responsible for the medicinal effects of Kutki, and the variation in content of these compounds in plants at different altitudes is a major question to be addressed. The picroside I and II content in various plant parts of P. kurrooa collected from different altitudes, viz. Sonemarg (2,740 m a.s.l.), Tangmarg (2,690 m a.s.l.), and Pulwama (1,630 m a.s.l.) in the north-western Kashmir Himalayas was analyzed by HPLC. A considerable degree of variation in picroside content was observed. Picroside I and II was highest in populations collected from Sonemarg followed by Tangmarg, suggesting that picroside accumulation is directly correlated with altitudinal change. More picroside I was found in the rhizome and roots of the Pulwama population as compared to Tangmarg samples, whereas the quantity of Picroside II was reduced in plants from Pulwama compared to the Tangmarg population, suggesting that cultivation of P. kurroa at lower altitude reduces the picroside content. The quantities of picrosides also varied spatially, being highest in rhizome followed by roots, inflorescence and leaves in the populations from all three locations. The study concludes that picroside I and II accumulation depends on altitude, which could help in the selection and collection of superior genotypes with uniform effects for utilization by the pharmaceutical industry.
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Affiliation(s)
- Meenu Katoch
- Biotechnology Department, Indian Institute of Integrative Medicine, Jammu, India.
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Kumar A, Agarwal SP, Ahuja A, Ali J, Choudhry R, Baboota S. Preparation, characterization, and in vitro antimicrobial assessment of nanocarrier based formulation of nadifloxacin for acne treatment. Pharmazie 2011; 66:111-114. [PMID: 21434572] [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: 05/30/2023]
Abstract
The objective of the present study was to develop a nanocarrier based formulation of nadifloxacin and to investigate its in vitro antimicrobial effect against Propionibacterium acnes. Nanocarrier based microemulsion formulations were prepared by aqueous titration method, using oleic acid as oil phase, Tween-80 as surfactant and ethanol as co-surfactant in different ratios. This procedure yielded monodisperse microemulsions exhibiting a mean droplet size in the range of 95-560 nm. This range of particle size is good to treat follicle related disorders like acne vulgaris because the size of follicles is in the range of 50-100 microm. Furthermore the optimized formulations were characterized for surface morphology by transmission electron microscopy and refractive index. The permeation studies were carried out using rat skin mounted in Franz diffusion cells. Flux of the optimised formulation was 2.24 times that of control. The diameter of inhibition zone of the microemulsion was found good but smaller than that of a clindamycin disc because of the higher therapeutic efficacy of clindamycin against P. acnes. The results indicated that the developed microemulsion shows promising results against P. acnes bacteria and may be a good approach for acne treatment.
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Affiliation(s)
- A Kumar
- Department of Pharmaceutics, Faculty of Pharmacy, Hamdard University, New Delhi, India
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Varghese DS, Yagnambhatt V, Ahuja A. Dietary consumption pattern of selected commonwealth probables with special reference to energy and protein. Br J Sports Med 2010. [DOI: 10.1136/bjsm.2010.078725.140] [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: 11/03/2022]
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Abstract
The aim of this paper is to find microcytosis in donors, to establish prevalence of iron deficiency anaemia (IDA) and beta-thalassemia trait (BTT) in them and to evaluate which index is most effective in differentiating these two conditions. IDA and BTT are the most common causes of microcytic anaemia. Traditional approach is trial of iron treatment. Where thalassemias are common, this can lead to iron overload and failure to provide diagnosis/counselling in BTT. Initially 925 donor samples were evaluated on cell counter. Of these, 50 were found microcytic. These were subjected to Ferritin and HbA2 determination. Subsequently, additional 51, age- and sex-matched normocytic donor samples were selected as controls. These were subjected to the same tests. Nine indices namely RBC, RDW, Mentzer's, Shine and Lal, England and Fraser, Srivastava, Green and King, RDW index and Ricerca were used to differentiate IDA and BTT. Prevalence of microcytosis was 5.4%. Of these microcytic samples, 52% were IDA, 36% were BTT, 8% had both and 4% were undiagnosed. IDA had significantly lower Hb, mean corpuscular volume (MCV) and Ferritin levels than the control group. BTT had lower MCV, higher Ferritin and comparable Hb levels with control group. The Youden's index of Mentzer's was highest and RBC was the only index which had both sensitivity and specificity more than 80% for both IDA and BTT. It is desirable to routinely perform hemograms for all blood donors and further analyse the microcytic samples for Ferritin and HbA2 to diagnose IDA and BTT and to provide appropriate counselling/treatment.
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Affiliation(s)
- A K Tiwari
- IMA Blood Bank of Uttarakhand, Dehradun, Uttarakhand, India.
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Hui DSC, Wong KT, Antonio GE, Ahuja A, Sung JJY. Correlation of clinical outcomes and radiographic features in SARS patients. Hong Kong Med J 2009; 15 Suppl 8:24-28. [PMID: 20393209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023] Open
Affiliation(s)
- D S C Hui
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China.
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Yao S, Bangalore S, Ahuja A, Chaudhry FA. Stress echocardiography: risk stratification, prognosis, patient outcomes and cost-effectiveness. Minerva Cardioangiol 2009; 57:315-331. [PMID: 19513012] [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: 05/27/2023]
Abstract
The utilization of stress echocardiography has undergone considerable expansion and evolution over the past three decades. Although stress echocardiography was first conceived as a noninvasive diagnostic tool for determining the presence or absence of coronary artery disease (CAD), its prognostic value is now well established. Thus, identification of patients at risk for future cardiac events has become a primary objective in the noninvasive evaluation of patients with chest pain syndromes and among patients with known CAD. In particular, the ability of stress echocardiography to identify patients at low (<1%), intermediate (1-5%) or high (>5%) risk for future cardiac events is essential to patient management decisions. Moreover, previous studies have conclusively demonstrated the incremental prognostic value of stress echocardiography over clinical and treadmill exercise data, in predicting future cardiac events. This review addresses the current role and summarizes current literature with respect to the use of stress echocardiography in determining patient risk for cardiac events and the cost-effective integration of such information into patient management decisions.
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Affiliation(s)
- S Yao
- Department of Medicine, Division of Cardiology, St. Luke's-Roosevelt Hospital Center, Columbia University College of Physicians and Surgeons, New York, NY 10025, USA
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Shakeel F, Baboota S, Ahuja A, Ali J, Shafiq S. Celecoxib Nanoemulsion for Transdermal Drug Delivery: Characterization and In Vitro Evaluation. J DISPER SCI TECHNOL 2009. [DOI: 10.1080/01932690802644012] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [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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Pandita D, Ahuja A, Velpandian T, Lather V, Dutta T, Khar RK. Characterization and in vitro assessment of paclitaxel loaded lipid nanoparticles formulated using modified solvent injection technique. Pharmazie 2009; 64:301-310. [PMID: 19530440] [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: 05/27/2023]
Abstract
This study investigates the design and characterization of solid lipid nanoparticles (SLNs) containing paclitaxel fabricated by a modified solvent injection technique using stearic acid as lipid and stabilized by a mixture of surfactants, for future evaluation of this colloidal carrier system for the oral delivery of paclitaxel, devoid of the side effects of Cremophor EL. SLN formulations of paclitaxel stabilized by mixture of surfactants i.e. lecithin/poloxamer 188 were developed with smaller size and narrow size distribution. The paclitaxel-loaded SLNs exhibited spherical shape with smooth surface as analyzed by transmission electron microscopy (TEM). The average particle size obtained through this method was found to be approximately 113 nm. The zeta potential was between -32 and -39 mV with poloxamer 188. Encapsulation efficiencies of about 72.18 +/- 3.7 and 89.0 +/- 2.4% were achieved using 0.05 and 0.25 mmol of paclitaxel, respectively. Paclitaxel showed a sustained in vitro release profile and was found to follow Higuchi kinetic equations. In vitro cytotoxicity assay confirmed that paclitxel entrapped in SLNs showed higher cytotoxicity against cultured hepatocelluler carcinoma cells than paclitaxel alone. The modified solvent injection technique used in this research proved to be a simple, easily available and effective method to produce SLNs and could be used for controlled delivery of different lipophilic drugs for cancer chemotherapy.
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Affiliation(s)
- D Pandita
- Department of Pharmaceutics, Faculty of Pharmacy, Jamia Hamdard, Hamdard University, India.
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Shakeel F, Baboota S, Ahuja A, Ali J, Shafiq S. Enhanced anti-inflammatory effects of celecoxib from a transdermally applied nanoemulsion. Pharmazie 2009; 64:258-259. [PMID: 19435145 DOI: 10.1691/ph.2009.8282] [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: 06/22/2023]
Abstract
The aim of the present study was to evaluate the enhanced anti-inflammatory effects of celecoxib (CXB) from a transdermally applied nanoemulsion. The anti-inflammatory effects of an optimized nanoemulsion formulation were compared with those of conventional CXB gel and nanoemulsion gel on carrageenan-induced paw edema in rats. These tests were compared using the Dunnett test of one-way analysis of variance (ANOVA). The % inhibition value after 24 h application was significant for optimized formulation C2 (85.4%) compared with CXB gel and nanoemulsion gel (p < 0.05). These results suggest that nanoemulsions can be successfully used to enhance the anti-inflammatory effects of CXB.
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Affiliation(s)
- F Shakeel
- Department of Pharmaceutics, Faculty of Pharmacy, Alarab Medical University, Benghazi, Libya.
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Qureshi J, Ahuja A, Baboota S, Chutani K, Jain S, Ali J. Development and evaluation of a time-specific pulsatile-release tablet of aceclofenac: A solution for morning pain in rheumatoid arthritis. ACTA ACUST UNITED AC 2009. [DOI: 10.1358/mf.2009.31.1.1346610] [Citation(s) in RCA: 5] [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: 10/20/2022]
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