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Pradeep M, Saxena M, Mondal D, Franklin G. Do nanoparticles delivered to roots affect plant secondary metabolism? A comprehensive analysis in float seedling cultures of Hypericum perforatum L. Chemosphere 2024; 356:141789. [PMID: 38554871 DOI: 10.1016/j.chemosphere.2024.141789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 03/22/2024] [Accepted: 03/23/2024] [Indexed: 04/02/2024]
Abstract
Since nanoparticles (NPs) released into the environment from household or industrial wastes and applied directly on plants as agrochemicals can accumulate in the rhizosphere, it is imperative to understand how these NPs affect plant secondary metabolism upon their contact with the roots of intact plants. Here, the effects of Pd, Au, ZnO and Fe2O3 NPs on secondary metabolism were comprehensively investigated in Hypericum perforatum L float seedlings by analyzing 41 major secondary metabolites using ultra-performance liquid chromatography coupled with photodiode array, fluorescence detector and high-resolution mass spectrometry (UPLC-PDA-FLR-HRMS). The results showed that exposure of H. perforatum roots to Pd, Au, ZnO and Fe2O3 NPs rapidly led to fluctuations in the levels of secondary metabolites. Although these fluctuations did not correlate with NP type, concentration and duration of treatment, a total of 22 compounds were significantly altered by the NPs tested. In particular, 1 ppm Au increased the content of quercetin 3-(2″-acetylgalactoside), cadensin G and leutoskyrin by 5.02-, 2.12- and 2.58-fold, respectively after 24 h; 25 ppm Pd NPs led to a 2.1-fold increase in miquelianin content after 6 h; 50 ppm Fe2O3 NPs increased the level of furohyperforin by 3.09-fold and decreased the content of miquelianin 5.22-fold after 24 h and 50 ppm ZnO led to a 2.13-fold increase in hypericin after 48 h. These results emphasise the need to understand the intricate interplay between NPs and plant secondary metabolism in order to enable safer and efficient applications of NPs in agriculture.
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Affiliation(s)
- Matam Pradeep
- Institute of Plant Genetics of the Polish Academy of Sciences, Strzesynska 34, 60-479, Poznan, Poland
| | - Megha Saxena
- Institute of Plant Genetics of the Polish Academy of Sciences, Strzesynska 34, 60-479, Poznan, Poland
| | - Dibyendu Mondal
- Institute of Plant Genetics of the Polish Academy of Sciences, Strzesynska 34, 60-479, Poznan, Poland
| | - Gregory Franklin
- Institute of Plant Genetics of the Polish Academy of Sciences, Strzesynska 34, 60-479, Poznan, Poland.
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Brandenburg K, Hamad G, Meisel Z, Brune CR, Carter DE, Derkin J, Ingram DC, Jones-Alberty Y, Kenady B, Massey TN, Saxena M, Soltesz D, Subedi SK, Warren J. Measurements of the 27Al(α, n) Thick Target Yield near Threshold. NUCL SCI ENG 2022. [DOI: 10.1080/00295639.2022.2118483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2022]
Affiliation(s)
- K. Brandenburg
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - G. Hamad
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - Z. Meisel
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - C. R. Brune
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - D. E. Carter
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - J. Derkin
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - D. C. Ingram
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - Y. Jones-Alberty
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - B. Kenady
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - T. N. Massey
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - M. Saxena
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - D. Soltesz
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - S. K. Subedi
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - J. Warren
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
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Preiksaitis C, Henkel A, Saxena M. 98 Developing a Protocol for Medication Abortion in the Emergency Department: A Cross-sectional Survey of Emergency Physicians Regarding Providing Abortion Care. Ann Emerg Med 2022. [DOI: 10.1016/j.annemergmed.2022.08.121] [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: 11/27/2022]
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Saxena M, Von Heymann C, Santamaria A, Jin J, Chen C, Borrow A, Vanassche T, Unverdorben M, Colonna P. Management of edoxaban in patients undergoing multiple procedures: a subanalysis of the EMIT-AF/VTE program. Europace 2022. [DOI: 10.1093/europace/euac053.290] [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: 11/14/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Private company. Main funding source(s): Daiichi Sankyo
Background
Patients with atrial fibrillation (AF) or venous thromboembolism (VTE) receiving long-term direct oral anticoagulant (DOAC) therapy undergo diagnostic or therapeutic procedures at a rate of approximately 10% annually. The prospective Global EMIT-AF/VTE program (Edoxaban Management in Diagnostic and Therapeutic Procedures; NCT02950168, NCT02951039) demonstrated that physician-guided periprocedural management of the DOAC edoxaban in these patients was associated with low bleeding and thromboembolic event rates. It is unclear whether the experience of a previous (index) procedure influences the periprocedural management of subsequent procedures.
Purpose
To analyze differences in periprocedural edoxaban management in patients on chronic anticoagulation therapy undergoing multiple diagnostic or therapeutic procedures.
Methods
Baseline characteristics were recorded in patients enrolled in the EMIT-AF/VTE program who underwent multiple procedures. Details of periprocedural edoxaban interruption were collected from patients who underwent two procedures of the same European Heart Rhythm Association (EHRA) bleeding risk level or procedural type. Only data from the index and second procedure of the same category were included in this analysis; procedures conducted less than 7 days apart were excluded. All analyses are exploratory and descriptive in nature.
Results
Among 227 patients who underwent multiple procedures, the most common types were vascular and gastrointestinal (GI) procedures. Patients had a mean ± standard deviation age of 72.1 ± 9.8 years, a CHA2DS2-VASc score of 3.2 ± 1.6, a HAS-BLED score of 1.9 ± 1.0, and were mostly male (67.0%). Patients who underwent low/minor risk procedures were less likely to undergo edoxaban interruption with their second procedure compared with their index procedure (Figure 1A), and the median interruption duration was shorter for the second procedure (Table 1). A second high risk procedure was associated with a higher rate of both pre- and postprocedural edoxaban interruption compared with a patient’s index procedure, but treatment resumed earlier (Figure 1B). Patients who underwent vascular procedures had a lower rate of pre- and postprocedural interruption and a shorter interruption time with their second procedure (Table 1). Conversely, patients who underwent GI procedures experienced pre- and postprocedural interruption more often for their second procedure. The median interruption duration was longer for GI procedures than for vascular procedures (Table 1).
Conclusion
Overall, periprocedural edoxaban interruption varied by procedural bleeding risk and type. Edoxaban interruption patterns differed between index and second procedures, indicating that periprocedural edoxaban management may be influenced by the experience of previous procedures.
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Affiliation(s)
- M Saxena
- William Harvey Research Institute, Barts Health NHS Trust, London, United Kingdom of Great Britain & Northern Ireland
| | - C Von Heymann
- Vivantes Klinikum im Friedrichshain, Department of Anaesthesia & Intensive Care Medicine, Emergency Medicine, and Pain Therapy, Berlin, Germany
| | - A Santamaria
- University Hospital Vinalopo, Department of Hematology, Alicante, Spain
| | - J Jin
- Daiichi Sankyo, Global Specialty Medical Affairs, Basking Ridge, United States of America
| | - C Chen
- Daiichi Sankyo, Global Specialty Medical Affairs, Basking Ridge, United States of America
| | - A Borrow
- Daiichi Sankyo, Global Specialty Medical Affairs, Basking Ridge, United States of America
| | - T Vanassche
- University Hospitals (UZ) Leuven, Department of Cardiovascular Sciences, Leuven, Belgium
| | - M Unverdorben
- Daiichi Sankyo, Global Specialty Medical Affairs, Basking Ridge, United States of America
| | - P Colonna
- Polyclinic Hospital of Bari, Department of Cardiology, Bari, Italy
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Bishop J, Parker CE, Rogachev GV, Ahn S, Koshchiy E, Brandenburg K, Brune CR, Charity RJ, Derkin J, Dronchi N, Hamad G, Jones-Alberty Y, Kokalova T, Massey TN, Meisel Z, Ohstrom EV, Paneru SN, Pollacco EC, Saxena M, Singh N, Smith R, Sobotka LG, Soltesz D, Subedi SK, Voinov AV, Warren J, Wheldon C. Neutron-upscattering enhancement of the triple-alpha process. Nat Commun 2022; 13:2151. [PMID: 35444209 PMCID: PMC9021293 DOI: 10.1038/s41467-022-29848-7] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 03/31/2022] [Indexed: 11/30/2022] Open
Abstract
The neutron inelastic scattering of carbon-12, populating the Hoyle state, is a reaction of interest for the triple-alpha process. The inverse process (neutron upscattering) can enhance the Hoyle state’s decay rate to the bound states of 12C, effectively increasing the overall triple-alpha reaction rate. The cross section of this reaction is impossible to measure experimentally but has been determined here at astrophysically-relevant energies using detailed balance. Using a highly-collimated monoenergetic beam, here we measure neutrons incident on the Texas Active Target Time Projection Chamber (TexAT TPC) filled with CO2 gas, we measure the 3α-particles (arising from the decay of the Hoyle state following inelastic scattering) and a cross section is extracted. Here we show the neutron-upscattering enhancement is observed to be much smaller than previously expected. The importance of the neutron-upscattering enhancement may therefore not be significant aside from in very particular astrophysical sites (e.g. neutron star mergers). The triple-alpha process plays a role in nucleosynthesis, in the formation of 12C. Here, the authors discuss the rate and role of the neutron upscattering phenomenon on the triple-alpha process in a multi-step process.
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Affiliation(s)
- J Bishop
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA.
| | - C E Parker
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA
| | - G V Rogachev
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA.,Department of Physics & Astronomy, Texas A&M University, College Station, TX, 77843, USA.,Nuclear Solutions Institute, Texas A&M University, College Station, TX, 77843, USA
| | - S Ahn
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA.,Center for Exotic Nuclear Studies, Institute for Basic Science (IBS), Daejeon, 34126, Republic of Korea
| | - E Koshchiy
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA
| | - K Brandenburg
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - C R Brune
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - R J Charity
- Department of Chemistry, Washington University, St. Louis, MO, 63130, USA
| | - J Derkin
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - N Dronchi
- Department of Physics, Washington University, St. Louis, MO, 63130, USA
| | - G Hamad
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - Y Jones-Alberty
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - Tz Kokalova
- School of Physics and Astronomy, University of Birmingham, Birmingham, UK
| | - T N Massey
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - Z Meisel
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - E V Ohstrom
- Department of Physics, Washington University, St. Louis, MO, 63130, USA
| | - S N Paneru
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - E C Pollacco
- IRFU, CEA, Université Paris-Saclay, Gif-Sur-Yvette, France
| | - M Saxena
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - N Singh
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - R Smith
- Department of Engineering and Mathematics, Sheffield Hallam University, Sheffield, S1 1WB, UK
| | - L G Sobotka
- Department of Chemistry, Washington University, St. Louis, MO, 63130, USA.,Department of Physics, Washington University, St. Louis, MO, 63130, USA.,McDonnell Center for the Space Sciences, Washington University, St. Louis, MO, 63130, USA
| | - D Soltesz
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - S K Subedi
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - A V Voinov
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - J Warren
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - C Wheldon
- School of Physics and Astronomy, University of Birmingham, Birmingham, UK
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Linschoten M, Uijl A, Schut A, Jakob CEM, Romão LR, Bell RM, McFarlane E, Stecher M, Zondag AGM, van Iperen EPA, Hermans-van Ast W, Lea NC, Schaap J, Jewbali LS, Smits PC, Patel RS, Aujayeb A, van der Harst P, Siebelink HJ, van Smeden M, Williams S, Pilgram L, van Gilst WH, Tieleman RG, Williams B, Asselbergs FW, Al-Ali AK, Al-Muhanna FA, Al-Rubaish AM, Al-Windy NYY, Alkhalil M, Almubarak YA, Alnafie AN, Alshahrani M, Alshehri AM, Anning C, Anthonio RL, Badings EA, Ball C, van Beek EA, ten Berg JM, von Bergwelt-Baildon M, Bianco M, Blagova OV, Bleijendaal H, Bor WL, Borgmann S, van Boxem AJM, van den Brink FS, Bucciarelli-Ducci C, van Bussel BCT, Byrom-Goulthorp R, Captur G, Caputo M, Charlotte N, vom Dahl J, Dark P, De Sutter J, Degenhardt C, Delsing CE, Dolff S, Dorman HGR, Drost JT, Eberwein L, Emans ME, Er AG, Ferreira JB, Forner MJ, Friedrichs A, Gabriel L, Groenemeijer BE, Groenendijk AL, Grüner B, Guggemos W, Haerkens-Arends HE, Hanses F, Hedayat B, Heigener D, van der Heijden DJ, Hellou E, Hellwig K, Henkens MTHM, Hermanides RS, Hermans WRM, van Hessen MWJ, Heymans SRB, Hilt AD, van der Horst ICC, Hower M, van Ierssel SH, Isberner N, Jensen B, Kearney MT, van Kesteren HAM, Kielstein JT, Kietselaer BLJH, Kochanek M, Kolk MZH, Koning AMH, Kopylov PY, Kuijper AFM, Kwakkel-van Erp JM, Lanznaster J, van der Linden MMJM, van der Lingen ACJ, Linssen GCM, Lomas D, Maarse M, Macías Ruiz R, Magdelijns FJH, Magro M, Markart P, Martens FMAC, Mazzilli SG, McCann GP, van der Meer P, Meijs MFL, Merle U, Messiaen P, Milovanovic M, Monraats PS, Montagna L, Moriarty A, Moss AJ, Mosterd A, Nadalin S, Nattermann J, Neufang M, Nierop PR, Offerhaus JA, van Ofwegen-Hanekamp CEE, Parker E, Persoon AM, Piepel C, Pinto YM, Poorhosseini H, Prasad S, Raafs AG, Raichle C, Rauschning D, Redón J, Reidinga AC, Ribeiro MIA, Riedel C, Rieg S, Ripley DP, Römmele C, Rothfuss K, Rüddel J, Rüthrich MM, Salah R, Saneei E, Saxena M, Schellings DAAM, Scholte NTB, Schubert J, Seelig J, Shafiee A, Shore AC, Spinner C, Stieglitz S, Strauss R, Sturkenboom NH, Tessitore E, Thomson RJ, Timmermans P, Tio RA, Tjong FVY, Tometten L, Trauth J, den Uil CA, Van Craenenbroeck EM, van Veen HPAA, Vehreschild MJGT, Veldhuis LI, Veneman T, Verschure DO, Voigt I, de Vries JK, van de Wal RMA, Walter L, van de Watering DJ, Westendorp ICD, Westendorp PHM, Westhoff T, Weytjens C, Wierda E, Wille K, de With K, Worm M, Woudstra P, Wu KW, Zaal R, Zaman AG, van der Zee PM, Zijlstra LE, Alling TE, Ahmed R, van Aken K, Bayraktar-Verver ECE, Bermúdez Jiménes FJ, Biolé CA, den Boer-Penning P, Bontje M, Bos M, Bosch L, Broekman M, Broeyer FJF, de Bruijn EAW, Bruinsma S, Cardoso NM, Cosyns B, van Dalen DH, Dekimpe E, Domange J, van Doorn JL, van Doorn P, Dormal F, Drost IMJ, Dunnink A, van Eck JWM, Elshinawy K, Gevers RMM, Gognieva DG, van der Graaf M, Grangeon S, Guclu A, Habib A, Haenen NA, Hamilton K, Handgraaf S, Heidbuchel H, Hendriks-van Woerden M, Hessels-Linnemeijer BM, Hosseini K, Huisman J, Jacobs TC, Jansen SE, Janssen A, Jourdan K, ten Kate GL, van Kempen MJ, Kievit CM, Kleikers P, Knufman N, van der Kooi SE, Koole BAS, Koole MAC, Kui KK, Kuipers-Elferink L, Lemoine I, Lensink E, van Marrewijk V, van Meerbeeck JP, Meijer EJ, Melein AJ, Mesitskaya DF, van Nes CPM, Paris FMA, Perrelli MG, Pieterse-Rots A, Pisters R, Pölkerman BC, van Poppel A, Reinders S, Reitsma MJ, Ruiter AH, Selder JL, van der Sluis A, Sousa AIC, Tajdini M, Tercedor Sánchez L, Van De Heyning CM, Vial H, Vlieghe E, Vonkeman HE, Vreugdenhil P, de Vries TAC, Willems AM, Wils AM, Zoet-Nugteren SK. Clinical presentation, disease course, and outcome of COVID-19 in hospitalized patients with and without pre-existing cardiac disease: a cohort study across 18 countries. Eur Heart J 2022; 43:1104-1120. [PMID: 34734634 DOI: 10.1093/eurheartj/ehab656] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 06/22/2021] [Accepted: 09/01/2021] [Indexed: 12/25/2022] Open
Abstract
AIMS Patients with cardiac disease are considered high risk for poor outcomes following hospitalization with COVID-19. The primary aim of this study was to evaluate heterogeneity in associations between various heart disease subtypes and in-hospital mortality. METHODS AND RESULTS We used data from the CAPACITY-COVID registry and LEOSS study. Multivariable Poisson regression models were fitted to assess the association between different types of pre-existing heart disease and in-hospital mortality. A total of 16 511 patients with COVID-19 were included (21.1% aged 66-75 years; 40.2% female) and 31.5% had a history of heart disease. Patients with heart disease were older, predominantly male, and often had other comorbid conditions when compared with those without. Mortality was higher in patients with cardiac disease (29.7%; n = 1545 vs. 15.9%; n = 1797). However, following multivariable adjustment, this difference was not significant [adjusted risk ratio (aRR) 1.08, 95% confidence interval (CI) 1.02-1.15; P = 0.12 (corrected for multiple testing)]. Associations with in-hospital mortality by heart disease subtypes differed considerably, with the strongest association for heart failure (aRR 1.19, 95% CI 1.10-1.30; P < 0.018) particularly for severe (New York Heart Association class III/IV) heart failure (aRR 1.41, 95% CI 1.20-1.64; P < 0.018). None of the other heart disease subtypes, including ischaemic heart disease, remained significant after multivariable adjustment. Serious cardiac complications were diagnosed in <1% of patients. CONCLUSION Considerable heterogeneity exists in the strength of association between heart disease subtypes and in-hospital mortality. Of all patients with heart disease, those with heart failure are at greatest risk of death when hospitalized with COVID-19. Serious cardiac complications are rare during hospitalization.
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Saxena M, Sharma N, Saxena R. 4‐Aminosalicylic Acid Functionalized Multiwalled Carbon Nanotubes for Rapid Removal of Crystal Violet Dye from Wastewater Using Minicolumn. ChemistrySelect 2021. [DOI: 10.1002/slct.202102847] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Megha Saxena
- Department of Chemistry Kirori Mal College University of Delhi Delhi 110007 India
| | - Niharika Sharma
- Department of Chemistry Kirori Mal College University of Delhi Delhi 110007 India
| | - Reena Saxena
- Department of Chemistry Kirori Mal College University of Delhi Delhi 110007 India
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Vanassche T, Colonna P, Santamaria A, Chen C, Von Heymann C, Jin J, Saxena M, Jiang W, Unverdorben M. Periprocedural anticoagulation management in edxoaban patients undergoing catheter-based cardiovascular procedures: analyses of the noninterventional global EMIT study. Europace 2021. [DOI: 10.1093/europace/euab116.271] [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: 11/14/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Private company. Main funding source(s): Daiichi Sankyo
Background
The optimal periprocedural management of direct oral anticoagulants (DOAC), including edoxaban, in patients undergoing catheter-based cardiovascular procedures is unknown, and mainly based on physician opinion and experience.
Purpose
To assess real-world management of edoxaban in patients undergoing cardiovascular procedures, and to report their clinical events.
Methods
Global EMIT-AF/VTE is a prospective study of periprocedural management in edoxaban-treated patients undergoing diagnostic and therapeutic procedures. We report the data from patients undergoing cardiovascular procedures. Timing and duration of edoxaban interruption were at the treating physician’s discretion. Outcomes were collected from 5 days before until 30 days post procedure. Primary outcome was the incidence of major bleeding (MB); secondary outcomes included incidence of clinically relevant non-major bleeding (CRNMB) and acute thromboembolic events (ATE).
Results
Data was collected from 301 and 311 procedures with arterial or venous access, respectively. Baseline characteristics are shown in Table 1. Edoxaban was not interrupted in 36.9% of arterial and 52.7% of venous procedures. Edoxaban was interrupted pre-procedure in 41% of arterial and 32.8% of venous procedures. The median periprocedural interruption was 2 days. The overall incidence of bleeding was very low. Any bleeding was reported in 8 patients undergoing arterial and 10 patients undergoing venous procedures (2.7% and 3.2%). MB or CRNMB occurred in 2 arterial and 3 venous procedures (0.7% and 1.0%) and ATE occurred in 5 arterial and 1 venous procedure (1.7% and 0.3%, Table 1).
Conclusions
In this study, the periprocedural risks of bleeding and thrombotic events were low. About a third of arterial access procedures and half of venous access procedures were performed without edoxaban interruption. Arterial(n = 301) Venous(n = 311) Baseline characteristics Age, year, mean (SD)Male, n (%)Weight (kg), mean (SD) 71.9 (8.5)211 (70.1%)80.8 (16.7) 64.6 (11.1)215 (69.1%)84.1 (17.4) CrCL (mL/min), mean (SD) CHA2DS2-VASc score, mean (SD)HAS-BLED score, mean (SD) 73.5 (29.8) 3.3 (1.5)2.0 (1.0) 88.9 (35.5) 2.2 (1.5)1.3 (1.0) Edoxaban 60 mg / 30 mg, % 73% / 26% 88% / 26% Coronary heart disease, n (%) Congestive heart failure, n (%) 101 (33.6%) 58 (19.3%) 51 (16.4%) 33 (10.6%) Interruption of edoxaban, n (%) No interruption Pre-procedure only Post-procedure only Pre- and post-procedure 111 (36.9%)125 (41.5%)12 (4.0%)53 (17.6%) 164 (52.7%)102 (32.8%)8 (2.6%)37 (11.9%) Clinical events, n (%) MB or CRNMBACSStroke/Transient ischemic attackCV mortalityAll-cause mortality 2 (0.7%)2 (0.7%)3 (1.0%)1 (0.3%)2 (0.7%) 3 (1.0%) 01 (0.3%)00
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Affiliation(s)
- T Vanassche
- University Hospitals (UZ) Leuven, Leuven, Belgium
| | - P Colonna
- Polyclinic Hospital of Bari, Bari, Italy
| | - A Santamaria
- University Hospital Vilaopo y Torrevieja, Alicante, Spain
| | - C Chen
- Daiichi Sankyo, Inc., Basking Ridge, United States of America
| | - C Von Heymann
- Vivantes Klinikum im Friedrichshain, Berlin, Germany
| | - J Jin
- Daiichi Sankyo, Inc., Basking Ridge, United States of America
| | - M Saxena
- William Harvey Research Institute, London, United Kingdom of Great Britain & Northern Ireland
| | - W Jiang
- Daiichi Sankyo, Inc., Basking Ridge, United States of America
| | - M Unverdorben
- Daiichi Sankyo, Inc., Basking Ridge, United States of America
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Unverdorben M, Colonna P, Von Heymann C, Santamaria A, Saxena M, Vanassche T, Wilkins R, Chen C. Periprocedural management of patients on edoxaban undergoing pacemaker and cardiac monitoring device implantation - a sub-analysis of the EMIT-AF/VTE study. Europace 2021. [DOI: 10.1093/europace/euab116.274] [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: 11/14/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Private company. Main funding source(s): Daiichi Sankyo
Background
Periprocedural management of patients on direct oral anticoagulants undergoing insertion of permanent pacemaker (PPM) and cardiac monitoring devices is mainly based on pharmacokinetic considerations, clinical experience, and expert opinion.
Purpose
To describe the characteristics, periprocedural management, and events of edoxaban patients undergoing implantation of PPM/monitoring devices.
Methods
From the global EMIT-AF/VTE registry, which includes edoxaban patients undergoing any diagnostic or therapeutic procedures, those with PPM/cardiac monitoring device implantation were observed from five days prior to 30 days post procedure. Events documented included the incidence of International Society on Thrombosis and Haemostasis defined Major Bleeding, Clinically Relevant Non-Major Bleeding (CRNMB), acute thromboembolic events (ATE) and perioperative edoxaban interruption times.
Results
PPM or invasive cardiac monitoring devices were implanted in 136 patients. Conformance with European Heart Rhythm Association Guidance for the interruption of anticoagulation was variable: of the cardiac monitoring patients, 62.5% had interruption of treatment, whereas in PPM procedures 23.4% had no interruption. One case of CRNMB and two cases of minor bleeding were documented. All bleedings seem non procedure-related since they occurred > three days post procedure. There were no ATE.
Conclusions
Relevant complications for edoxaban treated patients undergoing PPM or invasive cardiac monitoring procedures were rare. This population of patients is apparently well managed in routine practice, but further investigation of risk factors is justified. TablePatient characteristics Parameter All subjectsN = 136 All pacemakerN = 128 Insertion first pacemakerN = 89 Change pacemakerN = 39 Monitoring deviceN = 8 Age, mean (SD)Male, n (%) 75.1 (10.1)85 (62.5) 75.0 (10.3)83 (64.8) 75.7 (9.9)57 (64.0) 73.5 (11.2)26 (66.7) 76.3 (4.3)2 (25.0) BMI, mean (SD) 27.1 (5.5) 27.2 (5.6) 27.2 (6.0) 27.3 (4.5) 25.2 (4.3) AF, n (%)‡ 135 (99.3) 127 (99.2) 89 (100.0) 38 (97.4) 8 (100.0) VTE, n (%)‡ 3 (2.2) 3 (2.3) 1 (1.1) 2 (5.1) 0 CrCL, mean (SD) 63.8 (26.4) 64.1 (26.7) 62.3 (26.2) 68.3 (27.9) 58.9 (21.8) CrCL, ≤50, n (%) 43 (31.6) 41 (32.0) 33 (37.1) 8 (20.5) 2 (25.0) HAS-BLED Score, mean (SD) 2.0 (1.2) 1.9 (1.2) 1.9 (1.0) 2.1 (1.6) 2.6 (0.5) CHA2DS2-VASc Score, mean (SD) 3.7 (1.6) 3.7 (1.6) 3.7 (1.5) 3.8 (1.9) 3.1 (0.6) Edoxaban 30 mg/day, n (%) 49 (36.0) 46 (35.9) 32 (36.0) 14 (35.9) 3 (37.5) Edoxaban 60 mg/day, n (%) 86 (63.2) 81 (63.3) 56 (62.9) 25 (64.1) 5 (62.5) AF, atrial fibrillation; BMI, body mass index; CrCL, creatinine clearance; VTE, venous thromboembolism. ‡Two patients had both AF and VTE.
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Affiliation(s)
- M Unverdorben
- Daiichi Sankyo, Inc., Basking Ridge, United States of America
| | - P Colonna
- Polyclinic Hospital of Bari, Bari, Italy
| | - C Von Heymann
- Vivantes Klinikum im Friedrichshain, Berlin, Germany
| | - A Santamaria
- University Hospital Vilaopo y Torrevieja, Alicante, Spain
| | - M Saxena
- William Harvey Research Institute, London, United Kingdom of Great Britain & Northern Ireland
| | - T Vanassche
- University Hospitals (UZ) Leuven, Leuven, Belgium
| | - R Wilkins
- QPS Consulting, LLC, Ashburn, United States of America
| | - C Chen
- Daiichi Sankyo, Inc., Basking Ridge, United States of America
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Unverdorben M, von Heymann C, Santamaria A, Saxena M, Vanassche T, Jin J, Laeis P, Wilkins R, Chen C, Colonna P. Correction to: Elderly patients with atrial fibrillation in routine clinical practice: peri-procedural management of edoxaban oral anticoagulation therapy is associated with a low risk of bleeding and thromboembolic complications: a subset analysis of the prospective, observational, multinational EMIT-AF study. BMC Cardiovasc Disord 2021; 21:91. [PMID: 33588744 PMCID: PMC7885390 DOI: 10.1186/s12872-021-01873-2] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
An amendment to this paper has been published and can be accessed via the original article.
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Affiliation(s)
- M Unverdorben
- Global Medical Affairs Specialty and Value Products, Daiichi Sankyo Inc., 211 Mt Airy Road, Basking Ridge, NJ, 07920, USA.
| | - C von Heymann
- Department of Anaesthesia and Intensive Care Medicine, Emergency Medicine, and Pain Therapy, Vivantes Klinikum Im Friedrichshain, Landsberger Allee 49, 10249, Berlin, Germany
| | - A Santamaria
- Hematology Department, University Hospital Vilaopó y Torrevieja, Alicante, Spain
| | - M Saxena
- William Harvey Research Institute, Barts Health NHS Trust, Charterhouse Square, London, EC1M 6BQ, UK
| | - T Vanassche
- Department of Cardiovascular Sciences, University Hospitals (UZ) Leuven, Leuven, Belgium
| | - J Jin
- Global Medical Affairs Specialty and Value Products, Daiichi Sankyo Inc., 211 Mt Airy Road, Basking Ridge, NJ, 07920, USA
| | - P Laeis
- Daiichi Sankyo, Medical Affairs Europe, Munich, Germany
| | - R Wilkins
- QPS Consulting, LLC, 19884 Naples Lakes Terrace, Ashburn, VA, 20147, USA
| | - C Chen
- Global Medical Affairs Specialty and Value Products, Daiichi Sankyo Inc., 211 Mt Airy Road, Basking Ridge, NJ, 07920, USA
| | - P Colonna
- Department of Cardiology, Polyclinic of Bari - Hospital, 70124, Bari, Italy
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11
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Affiliation(s)
- O. J. Boxma
- EURANDOM and Department of Mathematics and Computer Science, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - M. Saxena
- EURANDOM and Department of Mathematics and Computer Science, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - A. J. E. M. Janssen
- EURANDOM and Department of Mathematics and Computer Science, Eindhoven University of Technology, Eindhoven, the Netherlands
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Abstract
OBJECTIVE The aim of this study was to explore the use of a logarithmic amplifier to improve the spatial resolution (RES) of a low-cost electrical impedance tomography (EIT) system. In an EIT system, the measured signal has a large dynamic range from µV to mV, which requires high-RES (analog to digital conversion) cards. The logarithmic amplifier reduces the dynamic range by expanding lower values and compressing higher values, thereby improving the sensitivity and at the same time preventing the signal from saturation. In addition, a low-RES analog to digital conversion (ADC) cards can be used, making the system cost effective. This work evaluates the performance of a logarithmic amplifier and a linear amplifier used for signal conditioning in a low-cost EIT system. APPROACH Two EIT systems based on a linear amplifier and logarithmic amplifier were designed. Phantom experiments were carried out with very small amounts of current injection. The signal-to-noise ratio (SNR), image quality, minimum detectable size and minimum detectable conductivity change were obtained. MAIN RESULTS The logarithmic amplifier-based EIT system increased the average SNR by 4 dB. It also showed improvement in the RES and contrast-to-noise ratio of the images. The minimum size detectable by the logarithmic amplifier-based system was of radius 0.25 cm in a tank of radius 11 cm and the minimum change in conductivity detectable was 11%. SIGNIFICANCE Logarithmic amplifier-based signal conditioning is a promising technique for improving the spatial RES of a low-cost EIT system that has a low-RES ADC.
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Affiliation(s)
- M Saxena
- Department of Electronic Science, Savitribai Phule Pune University, Pune, Maharashtra, India
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Unverdorben M, von Heymann C, Santamaria A, Saxena M, Vanassche T, Jin J, Laeis P, Wilkins R, Chen C, Colonna P. Elderly patients with atrial fibrillation in routine clinical practice-peri-procedural management of edoxaban oral anticoagulation therapy is associated with a low risk of bleeding and thromboembolic complications: a subset analysis of the prospective, observational, multinational EMIT-AF study. BMC Cardiovasc Disord 2020; 20:504. [PMID: 33256590 PMCID: PMC7706022 DOI: 10.1186/s12872-020-01766-w] [Citation(s) in RCA: 1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 11/01/2020] [Indexed: 11/24/2022] Open
Abstract
Background Annually > 10% of patients with atrial fibrillation on oral anticoagulation undergo invasive procedures. Optimal peri-procedural management of anticoagulation, as judged by major bleeding and thromboembolic events, especially in the elderly, is still debated. Methods Procedures from 1442 patients were evaluated. Peri-procedural edoxaban management was guided only by the experience of the attending physician. The primary safety outcome was the rate of major bleeding. Secondary outcomes included the peri-procedural administration of edoxaban, other bleeding events, and the main efficacy outcome, a composite of acute coronary syndrome, non-hemorrhagic stroke, transient ischemic attack, systemic embolic events, deep vein thrombosis, pulmonary embolism, and mortality. Results Of the 1442 patients, 280 (19%) were < 65, 550 (38%) were 65–74, 514 (36%) 75–84, and 98 (7%) were 85 years old or older. With increasing age, comorbidities and risk scores were higher. Any bleeding complications were uncommon across all ages, ranging from 3.9% in patients < 65 to 4.1% in those 85 years or older; major bleeding rates in any age group were ≤ 0.6%. Interruption rates and duration increased with advancing age. Thromboembolic events were more common in the elderly, with all nine events occurring in those > 65, and seven in patients aged > 75 years. Conclusion Despite increased bleeding risk factors in the elderly, bleeding rates were small and similar across all age groups. However, there was a trend toward more thromboembolic complications with advancing age. Further efforts to identify the optimal management to reduce ischemic complications are needed. Trial registration: NCT# 02950168, October 31, 2016
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Affiliation(s)
- M Unverdorben
- Global Medical Affairs Specialty and Value Products, Daiichi Sankyo Inc., 211 Mt Airy Road, Basking Ridge, NJ, 07920, USA.
| | - C von Heymann
- Department of Anaesthesia and Intensive Care Medicine, Emergency Medicine, and Pain Therapy, Vivantes Klinikum Im Friedrichshain, Landsberger Allee 49, 10249, Berlin, Germany
| | - A Santamaria
- Hematology Department, University Hospital Vilaopó y Torrevieja, Alicante, Spain
| | - M Saxena
- William Harvey Research Institute, Barts Health NHS Trust, Charterhouse Square, London, EC1M 6BQ, UK
| | - T Vanassche
- Department of Cardiovascular Sciences, University Hospitals (UZ) Leuven, Leuven, Belgium
| | - J Jin
- Global Medical Affairs Specialty and Value Products, Daiichi Sankyo Inc., 211 Mt Airy Road, Basking Ridge, NJ, 07920, USA
| | - P Laeis
- Daiichi Sankyo, Medical Affairs Europe, Munich, Germany
| | - R Wilkins
- QPS Consulting, LLC, 19884 Naples Lakes Terrace, Ashburn, VA, 20147, USA
| | - C Chen
- Global Medical Affairs Specialty and Value Products, Daiichi Sankyo Inc., 211 Mt Airy Road, Basking Ridge, NJ, 07920, USA
| | - P Colonna
- Department of Cardiology, Polyclinic of Bari - Hospital, 70124, Bari, Italy
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Affiliation(s)
- Reena Saxena
- Department of ChemistryKirori Mal CollegeUniversity of Delhi Delhi 110007
| | - Megha Saxena
- Department of ChemistryKirori Mal CollegeUniversity of Delhi Delhi 110007
| | - Amit Lochab
- Department of ChemistryKirori Mal CollegeUniversity of Delhi Delhi 110007
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Saxena M, Nandi S, Saxena AK. QSAR and molecular docking studies of lethal factor protease inhibitors against Bacillus anthracis. SAR QSAR Environ Res 2019; 30:715-731. [PMID: 31556709 DOI: 10.1080/1062936x.2019.1658219] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 08/18/2019] [Indexed: 06/10/2023]
Abstract
Bacillus anthracis is considered as a biological warfare agent because it is the causative agent of the serious infectious anthrax disease. Delay in treatment leads to lethal factor-mediated toxaemia which is very critical due to lack of therapeutic options. Consequently, attempts have been made to discover potent lethal factor (LF) protease inhibitors such as small-molecule synthetic 2-thio-1,3-thiazolidine-4-one (rhodanine) compounds. But computed descriptor-based quantitative structure-activity relationship (QSAR) and drug design studies on such aspect are poorly represented. Therefore, an attempt was made for developing QSAR models using structural descriptors for 1,3-thiazolidine-4-one compounds. The models were developed on a series of 49 LF protease inhibitors using the combination of constitutional, functional group, atom-centred fragment and molecular property descriptors. The best QSAR model included four variables, namely, C-040, nR05, GVWAI-80 and ALOGP that correlated well with the anti-LF protease activity with a good correlation coefficient (r = 0.870) of good statistical significance (F4, 29 = 14.09 (α = 0.001) F4, 29 = 6.19). This model was also validated and explained 58.1% of variances of the Bacillus anthracis inhibitory activities of the studied compounds with r2pred = 0.710 which denotes external predictability. Finally, molecular docking was carried out to predict the mode of binding of some highly active congeneric compounds. It was shown that VAL 1403 is an important residue for phenyl ring. TYR 1456 and HIS 1418 are responsible for interaction with the rhodanine nucleus. Therefore, these residues are considered responsible for the inhibition of LF protease anthrax and can predict significant dimension of essential structural features of these inhibitors to evaluate, screen and help priorities of the synthesis of the candidates against anthrax bioterrorism.
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Affiliation(s)
- M Saxena
- Department of Chemistry, Amity University , Lucknow , India
| | - S Nandi
- Department of Pharmaceutical Chemistry, Global Institute of Pharmaceutical Education and Research, Affiliated to Uttarakhand Technical University , Kashipur , India
| | - A K Saxena
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute , Lucknow , India
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Bhattacharya BK, Green RO, Rao S, Saxena M, Sharma S, Ajay Kumar K, Srinivasulu P, Sharma S, Dhar D, Bandyopadhyay S, Bhatwadekar S, Kumar R. An Overview of AVIRIS-NG Airborne Hyperspectral Science Campaign Over India. CURR SCI INDIA 2019. [DOI: 10.18520/cs/v116/i7/1082-1088] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [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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17
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Abstract
Tracheal extubation can evoke an equally strong haemodyamic stress response as tracheal intubation. We present a patient with myocardial infarction who repeatedly failed tracheal extubation. He developed acute pulmonary oedema following each attempt at tracheal extubation due to sympathetic overactivity. A change of approach with extubation under propofol sedation followed by continued sympatholysis with dexmedetomidine infusion allowed successful extubation.
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Affiliation(s)
- A Kulkarni
- Intensive Care Unit, The St. George Hospital, Sydney, New South Wales
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18
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Nayar K, Saxena M, Singh M, Ahuja R, Gupta M, Kant G, Sharma N, Nayar D. Dysregulated genes involved in implantation failure in women with endometriosis. Fertil Steril 2017. [DOI: 10.1016/j.fertnstert.2017.07.592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Danta M, Barber DA, Zhang HP, Lee-Ng M, Baumgart SWL, Tsai VWW, Husaini Y, Saxena M, Marquis CP, Errington W, Kerr S, Breit SN, Brown DA. Macrophage inhibitory cytokine-1/growth differentiation factor-15 as a predictor of colonic neoplasia. Aliment Pharmacol Ther 2017; 46:347-354. [PMID: 28569401 DOI: 10.1111/apt.14156] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 04/30/2017] [Accepted: 04/30/2017] [Indexed: 12/16/2022]
Abstract
BACKGROUND Serum macrophage inhibitory cytokine-1 (MIC-1/GDF15) concentration has been associated with colonic adenomas and carcinoma. AIMS To determine whether circulating MIC-1/GDF15 serum concentrations are higher in the presence of adenomas and whether the level decreases after excision. METHODS Patients were recruited prospectively from a single centre and stratified into five groups: no polyps (NP); hyperplastic polyps (HP); sessile serrated ademona (SSA); adenomas (AP); and colorectal carcinoma (CRC). Blood samples were collected immediately before and 4 weeks after colonoscopy. MIC-1/GDF15 serum levels were quantified using ELISA. RESULTS Participants (n=301) were stratified as: NP; n=116 (52%), HP; n=37 (12%), SSA; n=19 (7%), AP; n=68 (23%); and CRC; n=3 (1%). Patients were excluded from the study due to nondiagnostic pathology (n=9, 3%) and exclusion criteria (n=20, 6%). In the 272 remaining subjects (M=149; F=123), age (P=.005), history of colonic polyps (P=.003) and family history of colonic polyps (P=.002) were associated with presence of adenomas. Baseline median MIC-1/GDF15 serum levels increased significantly from NP 609 (460-797) pg/mL, HP 582 (466-852) pg/mL, SSA 561 (446-837) pg/mL to AP 723 (602-1122) pg/mL and CRC 1107 (897-1107) pg/mL; (P<.001). In the pre- and postpolypectomy paired adenoma samples median MIC-1/GDF15 reduced significantly from 722 (603-1164) pg/mL to 685 (561-944) pg/mL (P=.002). A ROC analysis for serum MIC-1/GDF15 to identify adenomatous polyps indicated an area under the curve of 0.71. CONCLUSIONS Our data suggest that serum MIC-1/GDF15 has the diagnostic characteristics to increase the detection of colonic neoplasia and improve screening.
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Affiliation(s)
- M Danta
- St Vincent's Clinical School, Faculty of Medicine, UNSW, Sydney, NSW, Australia.,Department of Gastroenterology, St Vincent's Hospital, Sydney, NSW, Australia
| | - D A Barber
- St Vincent's Clinical School, Faculty of Medicine, UNSW, Sydney, NSW, Australia
| | - H P Zhang
- St Vincent's Centre of Applied Medical Research, St Vincent's Hospital, Sydney, NSW, Australia
| | - M Lee-Ng
- Department of Gastroenterology, St Vincent's Hospital, Sydney, NSW, Australia
| | - S W L Baumgart
- St Vincent's Clinical School, Faculty of Medicine, UNSW, Sydney, NSW, Australia
| | - V W W Tsai
- St Vincent's Clinical School, Faculty of Medicine, UNSW, Sydney, NSW, Australia.,St Vincent's Centre of Applied Medical Research, St Vincent's Hospital, Sydney, NSW, Australia
| | - Y Husaini
- St Vincent's Clinical School, Faculty of Medicine, UNSW, Sydney, NSW, Australia.,St Vincent's Centre of Applied Medical Research, St Vincent's Hospital, Sydney, NSW, Australia
| | - M Saxena
- St Vincent's Centre of Applied Medical Research, St Vincent's Hospital, Sydney, NSW, Australia
| | - C P Marquis
- The Westmead Institute for Medical Research, University of Sydney, Sydney, NSW, Australia
| | - W Errington
- St Vincent's Clinical School, Faculty of Medicine, UNSW, Sydney, NSW, Australia
| | - S Kerr
- Biostatistics, Kirby Institute, UNSW, Sydney, NSW, Australia
| | - S N Breit
- St Vincent's Clinical School, Faculty of Medicine, UNSW, Sydney, NSW, Australia.,St Vincent's Centre of Applied Medical Research, St Vincent's Hospital, Sydney, NSW, Australia
| | - D A Brown
- St Vincent's Clinical School, Faculty of Medicine, UNSW, Sydney, NSW, Australia.,St Vincent's Centre of Applied Medical Research, St Vincent's Hospital, Sydney, NSW, Australia.,The Westmead Institute for Medical Research, University of Sydney, Sydney, NSW, Australia
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Nayar K, Mohan A, Chulet S, Ahuja R, Kant G, Sharma N, Saxena M. Affect of GnRH agonist trigger followed by low dose hCG on reproductive outcome in at risk OHSS patients: a comparison between fresh and frozen transfer. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.578] [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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21
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Sharma SK, Mandal TK, Srivastava MK, Chatterjee A, Jain S, Saxena M, Singh BP, Sharma A, Adak A, K Ghosh S. Spatio-temporal variation in chemical characteristics of PM10 over Indo Gangetic Plain of India. Environ Sci Pollut Res Int 2016; 23:18809-18822. [PMID: 27316652 DOI: 10.1007/s11356-016-7025-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [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: 01/07/2016] [Accepted: 05/30/2016] [Indexed: 06/06/2023]
Abstract
The paper presents the spatio-temporal variation of chemical compositions (organic carbon (OC), elemental carbon (EC), and water-soluble inorganic ionic components (WSIC)) of particulate matter (PM10) over three locations (Delhi, Varanasi, and Kolkata) of Indo Gangetic Plain (IGP) of India for the year 2011. The observational sites are chosen to represent the characteristics of upper (Delhi), middle (Varanasi), and lower (Kolkata) IGP regions as converse to earlier single-station observation. Average mass concentration of PM10 was observed higher in the middle IGP (Varanasi 206.2 ± 77.4 μg m(-3)) as compared to upper IGP (Delhi 202.3 ± 74.3 μg m(-3)) and lower IGP (Kolkata 171.5 ± 38.5 μg m(-3)). Large variation in OC values from 23.57 μg m(-3) (Delhi) to 12.74 μg m(-3) (Kolkata) indicating role of formation of secondary aerosols, whereas EC have not shown much variation with maximum concentration over Delhi (10.07 μg m(-3)) and minimum over Varanasi (7.72 μg m(-3)). As expected, a strong seasonal variation was observed in the mass concentration of PM10 as well as in its chemical composition over the three locations. Principal component analysis (PCA) identifies the contribution of secondary aerosol, biomass burning, fossil fuel combustion, vehicular emission, and sea salt to PM10 mass concentration at the observational sites of IGP, India. Backward trajectory analysis indicated the influence of continental type aerosols being transported from the Bay of Bengal, Pakistan, Afghanistan, Rajasthan, Gujarat, and surrounding areas to IGP region.
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Affiliation(s)
- S K Sharma
- Radio and Atmospheric Sciences Division, CSIR-National Physical Laboratory, Dr. K S Krishnan Road, New Delhi, 110 012, India.
| | - T K Mandal
- Radio and Atmospheric Sciences Division, CSIR-National Physical Laboratory, Dr. K S Krishnan Road, New Delhi, 110 012, India
| | - M K Srivastava
- Department of Geophysics, Banaras Hindu University, Varanasi, 221 005, India
| | - A Chatterjee
- Centre for Astroparticle Physics and Space Sciences, Bose Institute, Kolkata, 700091, India
| | - Srishti Jain
- Radio and Atmospheric Sciences Division, CSIR-National Physical Laboratory, Dr. K S Krishnan Road, New Delhi, 110 012, India
| | - M Saxena
- Radio and Atmospheric Sciences Division, CSIR-National Physical Laboratory, Dr. K S Krishnan Road, New Delhi, 110 012, India
| | - B P Singh
- Department of Geophysics, Banaras Hindu University, Varanasi, 221 005, India
| | - A Sharma
- Radio and Atmospheric Sciences Division, CSIR-National Physical Laboratory, Dr. K S Krishnan Road, New Delhi, 110 012, India
| | - A Adak
- Centre for Astroparticle Physics and Space Sciences, Bose Institute, Kolkata, 700091, India
| | - S K Ghosh
- Centre for Astroparticle Physics and Space Sciences, Bose Institute, Kolkata, 700091, India
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22
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Banerjee A, Werba J, Neto J, Nambiar L, Saxena M, Peck V, Moniruzzaman M, Quinto K, Khandelwal S, Leong D. PS205 Health System Barriers to and Facilitators of Adherence to Medications for the Secondary Prevention of Cardiovascular Disease: A Systematic Review. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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23
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Saxena M, Bhunia SS, Saxena AK. Molecular modelling studies on 2-substituted octahydropyrazinopyridoindoles for histamine H2 receptor antagonism. SAR QSAR Environ Res 2015; 26:739-755. [PMID: 26461804 DOI: 10.1080/1062936x.2015.1088572] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Accepted: 08/26/2015] [Indexed: 06/05/2023]
Abstract
The human histamine H2 receptor (hH2HR) is a G-protein coupled receptor protein with seven transmembrane (TM)-spanning helices primarily involved in regulation of gastric acid secretion. Antagonists targeting hH2HR are useful in the treatment of hyperacidic conditions such as peptic ulcers, gastresophageal reflux disease and gastrointestinal bleeding. We have previously reported the antagonism of 2-substituted pyrazinopyridoindoles at the human histamine H1 receptor and mode of binding of these compounds at the hH1HR using in silico methods. Interestingly, some of the compounds in the series also showed promising activity towards hH2HR that prompted us to investigate the mode of binding of these compounds at hH2HR. In the absence of the crystal structure of hH2HR a homology model has been constructed using multiple sequence alignment, using the X-ray crystal structures of Turkey β1-adrenergic receptor (tβ1AR), Human histamine H1 receptor (hH1HR), Human β2-adrenergic receptor (hβ2AR) and Human D3 dopamine receptor (hD3R). The important residues for binding were depicted in TMIII, TMV, TMVI and TMVII by the homology modelled hH2HR for 2-substituted pyrazinopyridoindoles. A comparative study for deducing the selectivity regarding the binding towards hH1HR and hH2HR has been carried out, which may be useful in designing of selective hH1HR/hH2HR antagonists in these classes of compounds.
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Affiliation(s)
- M Saxena
- a Department of Chemistry , Amity University , Lucknow , India
| | - S S Bhunia
- b Global Institute of Pharmaceutical Education and Research , Kashipur , Uttarakhand , India
| | - A K Saxena
- c Division of Medicinal and Process Chemistry , CSIR Central Drug Research Institute , Lucknow , India
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Hammond NE, Taylor C, Saxena M, Liu B, Finfer S, Glass P, Seppelt I, Willenberg L, Myburgh J. Resuscitation fluid use in Australian and New Zealand Intensive Care Units between 2007 and 2013. Intensive Care Med 2015; 41:1611-9. [PMID: 26077073 DOI: 10.1007/s00134-015-3878-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [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: 04/15/2015] [Accepted: 05/08/2015] [Indexed: 01/02/2023]
Abstract
INTRODUCTION Recent evidence indicates that the choice of intravenous fluids may affect outcomes in critically ill patients. METHODS We recorded the administration of resuscitation fluids in patients admitted to Australian and New Zealand adult intensive care units (ICUs) for a 24-h period at 6 time points between 2007 and 2013. Changes in patterns of fluid use over this period were determined using regression analyses. RESULTS Of the 2825 patients admitted to the 61 ICUs on the 6 study days, 754 (26.7%) patients received fluid resuscitation. Of those receiving fluid resuscitation, the proportion of patients receiving crystalloid significantly increased from 28.9% (41/142) in 2007 to 50.5% (48/95) in 2013 (adjusted odds ratio (OR) 2.93; 95% confidence intervals (CI) 1.35-6.33; p = 0.006); of these, the proportion of patients receiving buffered salt solutions significantly increased from 4.9% (7/142) in 2007 to 31.6% (30/95) in 2013 (OR 7.00; 95% CI 2.14-22.92; p = 0.001). The use of colloids significantly decreased from 59.9% (85/142) in 2007 to 42.1% (40/95) in 2013 (adjusted OR 0.34; 95% CI 0.16-0.74; p = 0.007) due to a significant decrease in the proportion of patients receiving gelatin; 28.9% (41/142) to 2.1% (2/95) (OR 0.10; 95% CI 0.03-0.29; p ≤ 0.001). CONCLUSION Fluid resuscitation practice in Australia and New Zealand adult ICUs has changed over the 6-year study period. Crystalloid use increased primarily due to an increase in the use of buffered salt solutions while overall the use of colloid has decreased.
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Affiliation(s)
- N E Hammond
- Division of Critical Care and Trauma, The George Institute for Global Health, University of Sydney, Sydney, Australia,
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Antoniou S, Hamedi N, Lidder S, Saxena M, Brier T, Robinson P, Kapil V, Lobo M. CP-081 Management of uncontrolled blood pressure in patients with multiple drug intolerance referred to a specialist hypertension clinic: Abstract CP-081 Table 1. Eur J Hosp Pharm 2015. [DOI: 10.1136/ejhpharm-2015-000639.77] [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: 11/04/2022] Open
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Liang S, Saxena M, Finfer S, Myburgh J. Impact of high temperature on long-term outcomes in patients with traumatic brain injury: A systematic review of observational studies. Aust Crit Care 2015. [DOI: 10.1016/j.aucc.2014.10.016] [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: 10/23/2022] Open
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27
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Singh R, Jain P, Pandey NK, Saxena VK, Saxena M, Singh KB, Ahmed KA, Singh RP. Cytokines Expression and Nitric Oxide Production under Induced Infection to Salmonella Typhimurium in Chicken Lines Divergently Selected for Cutaneous Hypersensitivity. Asian-Australas J Anim Sci 2014; 25:1038-44. [PMID: 25049661 PMCID: PMC4092978 DOI: 10.5713/ajas.2011.11324] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Revised: 12/28/2011] [Accepted: 12/05/2011] [Indexed: 11/27/2022]
Abstract
In the present study, the impact of Salmonella Typhimurium on cell-mediated immunity (CMI) was investigated in 5 week-old immuno divergent broiler lines selected for the high and low response to phytohemagglutinin-P. The immune response was assessed in peripheral-blood mononuclear cells (PBMCs) induced with Salmonella Typhimurium at different time intervals (0 h, 0.5 h, 2 h, 4 h, 6 h, 12 h and 24 h). The differential mRNA expression patterns of IFN-γ, IL-2 and iNOS were evaluated by quantitative real time PCR. In-vitro production of nitric oxide (NO) was also estimated in the culture supernatant and correlated with iNOS mRNA expression. Present study showed higher production of NO in the high cell-mediated line (HCMI) as compared to the low cell-mediated line (LCMI) upon stimulation with Salmonella Typhimurium. Correspondingly, higher mRNA expression of iNOS and IFN-γ were observed in high response birds (HCMI); but IL-2 was down regulated in this line compared to the low response birds (LCMI). Significantly (p<0.05) higher expression of iNOS, IFN-γ and higher production of NO in high line indicated that the selection for PHA-P response might be employed for increasing the immune competence against Salmonella Typhimurium in chicken flocks.
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Affiliation(s)
- Rani Singh
- Avian Physiology and Genetics Division, Salim Ali Centre for Ornithology and Natural History, Anaikatty 641 108, Coimbatore, India
| | - Preeti Jain
- Avian Physiology and Genetics Division, Salim Ali Centre for Ornithology and Natural History, Anaikatty 641 108, Coimbatore, India
| | - N K Pandey
- Avian Physiology and Genetics Division, Salim Ali Centre for Ornithology and Natural History, Anaikatty 641 108, Coimbatore, India
| | - V K Saxena
- Avian Physiology and Genetics Division, Salim Ali Centre for Ornithology and Natural History, Anaikatty 641 108, Coimbatore, India
| | - M Saxena
- Avian Physiology and Genetics Division, Salim Ali Centre for Ornithology and Natural History, Anaikatty 641 108, Coimbatore, India
| | - K B Singh
- Avian Physiology and Genetics Division, Salim Ali Centre for Ornithology and Natural History, Anaikatty 641 108, Coimbatore, India
| | - K A Ahmed
- Avian Physiology and Genetics Division, Salim Ali Centre for Ornithology and Natural History, Anaikatty 641 108, Coimbatore, India
| | - R P Singh
- Avian Physiology and Genetics Division, Salim Ali Centre for Ornithology and Natural History, Anaikatty 641 108, Coimbatore, India
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Verma M, Metgud R, Madhusudan AS, Verma N, Saxena M, Soni A. A comparative study of glutamate oxaloacetate transaminase (GOT) and glutamate pyruvate transaminase (GPT) levels in the saliva of diabetic and normal patients. Biotech Histochem 2014; 89:529-34. [PMID: 24849491 DOI: 10.3109/10520295.2014.905705] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Diabetes has been reported to affect salivary glands adversely in humans and experimental models. Glutamate oxaloacetate transaminase (GOT), glutamate pyruvate transaminase (GPT) and lactate dehydrogenase (LDH) are salivary enzymes that also are widely distributed in animal tissues. We determined GOT and GPT levels in saliva samples of 100 type 1 and 30 type 2 diabetic patients using reflectance spectrophotometry and compared them to 30 age and sex matched healthy controls. Statistically significant differences were observed in the mean values of GOT and GPT in type 1 diabetics compared to type 2 and control groups. Significantly higher GOT levels were found in the 1-20 year age group of type 1 diabetics. Our findings suggest that salivary gland damage is due to the same immunological attack that affects pancreatic β cells and results in type 1 diabetes.
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Affiliation(s)
- M Verma
- Department of Oral Pathology and Microbiology, Darshan Dental College and Hospital , Udaipur , India
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Ray J, Datta Pramanik U, Bhowmik RK, Ray I, Rahaman A, Chakraborty A, Chakraborty S, Garg R, Goyal S, Ganguly S, Kumar S, Mandal S, Mukherjee B, Mukherjee P, Muralithar S, Negi D, Saxena M, Selvakumar K, Singh P, Singh AK, Singh RP. Exotic decay of hot rotating nuclei near proton drip line. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146602089] [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: 11/14/2022] Open
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Saxena M, Dykes SS, Malyarchuk S, Wang AE, Cardelli JA, Pruitt K. The sirtuins promote Dishevelled-1 scaffolding of TIAM1, Rac activation and cell migration. Oncogene 2013; 34:188-98. [PMID: 24362520 PMCID: PMC4067478 DOI: 10.1038/onc.2013.549] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 11/02/2013] [Accepted: 11/15/2013] [Indexed: 12/18/2022]
Abstract
Rac1-GTPases serve as intermediary cellular switches which conduct transient and constitutive signals from upstream cues, including those from Ras oncoproteins. While the sirtuin1 (SIRT1) deacetylase is overexpressed in several human cancers and has recently been linked to cancer cell motility as a context-dependent regulator of multiple pathways, its role in Rac1 activation has not been reported. Likewise, SIRT2 has been demonstrated to be upregulated in some cancers; however, studies have also reported its role in tumor suppression. Here, we demonstrate that SIRT1 and SIRT2 positively regulate the levels of Rac1-GTP and the activity of T-cell lymphoma invasion and metastasis 1 (TIAM1), a Rac guanine nucleotide exchange factor (GEF). Transient inhibition of SIRT1 and SIRT2 resulted in increased acetylation of TIAM1 whereas chronic SIRT2 knockdown resulted in enhanced acetylation of TIAM1. SIRT1 regulates Dishevelled (DVL) protein levels in cancer cells and DVL along with TIAM1 are known to augment Rac activation; however, SIRT1 or 2 have not been previously linked with TIAM1. We found that diminished sirtuin activity led to the disruption of the DVL1-TIAM1 interaction. We hence propose a model for Rac activation where SIRT1/2 positively modulate the DVL/TIAM1/Rac axis and promote sustained pathway activation.
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Affiliation(s)
- M Saxena
- Department of Molecular and Cellular Physiology, LSU Health Shreveport, Shreveport, LA, USA
| | - S S Dykes
- Department of Microbiology and Immunology, LSU Health Shreveport, Shreveport, LA, USA
| | - S Malyarchuk
- Department of Molecular and Cellular Physiology, LSU Health Shreveport, Shreveport, LA, USA
| | - A E Wang
- Department of Molecular and Cellular Physiology, LSU Health Shreveport, Shreveport, LA, USA
| | - J A Cardelli
- 1] Department of Microbiology and Immunology, LSU Health Shreveport, Shreveport, LA, USA [2] Feist-Weiller Cancer Center, LSU Health Shreveport, Shreveport, LA, USA
| | - K Pruitt
- 1] Department of Molecular and Cellular Physiology, LSU Health Shreveport, Shreveport, LA, USA [2] Feist-Weiller Cancer Center, LSU Health Shreveport, Shreveport, LA, USA
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Jain P, Singh R, Saxena VK, Singh KB, Ahmed KA, Tiwari AK, Saxena M, Sundaresan NR. In vitro rapid clearance of infectious bursal disease virus in peripheral blood mononuclear cells of chicken lines divergent for antibody response might be related to the enhanced expression of proinflammatory cytokines. Res Vet Sci 2013; 95:957-64. [PMID: 24075224 PMCID: PMC7111768 DOI: 10.1016/j.rvsc.2013.08.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 07/09/2013] [Accepted: 08/24/2013] [Indexed: 11/21/2022]
Abstract
Infectious bursal disease (IBD) is an acute and highly contagious viral disease of young chickens caused by infectious bursal disease virus (IBDV). An effective way to control IBDV would be to breed chickens with a reduced susceptibility to IBDV infection. In the present work, we used chickens selected for high and low specific responses to sheep red blood cells (SRBC) (H and L, respectively) to assess the susceptibility of differential immune competent animals to IBDV infection. The peripheral blood mononuclear cells (PBMCs) of high SRBC line (HL) and low SRBC line (LL) were infected with IBDV and viral RNA loads were determined at different time post-IBDV infection. Chicken orthologues of the T helper 1 (Th1) cytokines, interferon-γ (IFN-γ) and interleukin-2 (IL-2); a Th2 cytokine, IL-10; a pro inflammatory cytokine, IL-6; the CCL chemokines, chCCLi2, chCCLi4 and chCCLi7; colony stimulating factor, GM-CSF; and a anti-inflammatory cytokine, transforming growth factor β-2 (TGFβ-2) were quantified. The expression of chCCLi2, chCCLi4 and chCCLi7 was significantly higher in L line as compared to H line. However, in H line the viral RNA loads were significantly lower than in L line. Therefore, the upregulated chemokines might be associated with the susceptibility to IBDV. The expression of IFN-γ, IL-2 and IL-6 was significantly higher in H line as compared to L line. We assume that the higher proinflammatory cytokines expression in H line might be related to the rapid clearance of virus from PBMCs. Significantly higher levels of IL-10 and TGFβ-2 mRNAs in L line might be related to the pathogenesis of IBDV. In conclusion, selection for antibody responses appears to influence the expression profiles of chemokines and cytokines against IBDV. Further, the selection for high SRBC response might improve the immuno-competence of chickens against IBDV.
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Affiliation(s)
- Preeti Jain
- Disease Genetics and Biotechnology Laboratory, Central Avian Research Institute, Izatnagar, 243122 Bareilly, India; National Institute of Virology, Pune 411001, India.
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Sharma R, Tank P, Saxena M, Bhutra R, Ojha KG. Synthesis and Characterisation of Antifungal Agents Containing Copper(II) Soaps and Derived from Mustard and Soyabean Oil. TENSIDE SURFACT DET 2013. [DOI: 10.3139/113.100366] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
The solid copper(II) soaps derived from Mustard oil and Soyabean oil and their complexes with ligands containing nitrogen and sulphur atoms like urea, thiourea and 2-amino-6-chloro benzothiazole have been synthesized and characterised by elemental analysis, IR, NMR, ESR spectroscopy and magnetic moment studies. From the analytical data, the stoichiometry of the complexes have been observed to be 1: 1 (metal: ligand). The magnetic moment studies suggest the dimeric nature of the complexes. IR, NMR and ESR spectral details confirm that complexation has taken place successfully. The results indicate that the complexes possess elongated octahedral geometry. Conductometric studies suggest that the soaps and complexes are non-electrolytic in nature. The fungi toxicities of these ecofriendly and biodegradable soaps and complexes have been investigated.
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Affiliation(s)
- R. Sharma
- Department of Chemistry, S.D. Govt. College, Beawar, (Raj.) 305901, India
| | - P. Tank
- Department of Chemistry, S.D. Govt. College, Beawar, (Raj.) 305901, India
| | - M. Saxena
- Department of Chemistry, S.D. Govt. College, Beawar, (Raj.) 305901, India
| | - R. Bhutra
- Department of Chemistry, S.D. Govt. College, Beawar, (Raj.) 305901, India
| | - K. G. Ojha
- Department of Chemistry, M.D.S. University, Ajmer, (Raj.) 324001, India
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Saxena M, Bhunia SS, Saxena AK. Docking studies of novel pyrazinopyridoindoles class of antihistamines with the homology modelled H(1)-receptor. SAR QSAR Environ Res 2012; 23:311-325. [PMID: 22463083 DOI: 10.1080/1062936x.2012.664561] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Histamine is an important neurotransmitter as it controls a multitude of physiological functions by activating specific receptors on target cells. It exerts its effects by binding to four different histamine receptors (H(1)-H(4)), which all belong to the large family of G protein-coupled receptors (GPCRs). Research and development of H(1) ligand has largely focused on antagonists which are used for their anti-allergy effects in the periphery. Recent understanding of the clinical importance of H(1) receptors in brain, however, suggests the pharmacotherapeutic potential of H(1) agonists in neurodegenerative and neuropsychiatric disorders. Despite the therapeutic importance of the H(1) receptor, for many years the molecular features of the H(1) receptor protein had been unknown. In view of the recently reported crystal structure of human H(1) receptor and in continuation of our work on 3D-pharmacophore on antihistamine H(1) and homology model of histamine H(1) receptor, docking studies have been carried out on some promising pyrazinopyridoindole class of antihistamine H(1), including two outliers, to validate our earlier reported models/hypotheses on H(1)-receptor, where a good explanation between estimated and observed activities has been obtained. In addition, the docking study also provided insights about the optimal activity of the outliers, for which no explanation was reported previously.
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Affiliation(s)
- M Saxena
- Department of Chemistry, Amity University, Lucknow, India.
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Hammond NE, Saxena M, Young P, Taylor C, Seppelt I, Glass P, Myburgh J. Temperature management for patients without brain injury in Australia and New Zealand ICUs: a point prevalence study. Crit Care 2012. [PMCID: PMC3363476 DOI: 10.1186/cc10665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Saxena M, Kumaran S, Goyal V, Behari M. 2.138 A COMPARATIVE FOLLOW-UP FMRI STUDY FOR A SIMPLE MOTOR TASK IN PD AND MSA. Parkinsonism Relat Disord 2012. [DOI: 10.1016/s1353-8020(11)70510-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Maheshwari RK, Saxena M, Gahlot M, Chaki R, Kinariwala M, Jagwani Y. Novel application of hydrotropic solubilizing additives in the estimation of aspirin in tablets. Indian J Pharm Sci 2011; 72:649-51. [PMID: 21695002 PMCID: PMC3116315 DOI: 10.4103/0250-474x.78539] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2007] [Revised: 05/31/2010] [Accepted: 09/25/2010] [Indexed: 11/24/2022] Open
Abstract
Highly concentrated aqueous solutions of various hydrotropic agents like sodium benzoate, sodium salicylate, sodium acetate, sodium citrate, nicotinamide and sodium ascorbate have been observed to enhance aqueous solubilities of a large number of poorly water-soluble drugs. In the present investigation hydrotropic solubilization technique has been employed to solubilize poorly water-soluble aspirin (analgesic and antipyretic drug) by 0.5 M ibuprofen sodium solution to carry out titrimetric analysis of aspirin in tablet dosage form. Results of analysis by proposed method and Phamacopoeial method are very comparable. Proposed method is new, rapid, simple, accurate, and reproducible. Statistical data proved the accuracy, reproducibility and the precision of proposed method.
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Affiliation(s)
- R K Maheshwari
- Department of Pharmacy, S. G. S. I. T. S., 23 Park Road, Indore-452 003, India
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Yadav B, Bajaj A, Saxena M, Saxena AK. In Vitro Anticancer Activity of the Root, Stem and Leaves of Withania Somnifera against Various Human Cancer Cell Lines. Indian J Pharm Sci 2011; 72:659-63. [PMID: 21695006 PMCID: PMC3116319 DOI: 10.4103/0250-474x.78543] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [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: 11/20/2009] [Revised: 06/21/2010] [Accepted: 09/30/2010] [Indexed: 11/10/2022] Open
Abstract
Withania Somnifera Dunal know as Ashwagandha belong Solanaceae family. It is extensively used in most of the Indian herbal pharmaceuticals and nutraceuticals. The current study, evaluate in vitro cytotoxicity in 50% ethanol extract of root, stem and leaves of Withania Somnifera against five human cancer cell lines of four different tissues i.e. PC-3, DU-145 (prostrate), HCT-15 (colon), A-549 (lung) and IMR-32 (neuroblastoma). Root, stem and leaves extracts showed cytotoxicity activity ranging 0-98% depending on the cell lines but maximum activity was found in 50% ethanol extract of leaves of Withania Somnifera. Ethanol extract of leaves obtained from treatments T2, T3, T4 and T5 showed strong activity against PC-3 and HCT-15 with 80-98% growth inhibition, while the 50% ethanol extract of leaves from T1 treatment showed a minimum of 39% and T3 treatment showed a maximum of 98% growth inhibition against HCT-15. This investigation is the first report of the anticancer activity in various parts of Withania Somnifera cultivated in fly ash amended soil.
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Affiliation(s)
- B Yadav
- Advanced Materials and Processes Research Institute (CSIR), Bhopal-462 026, India
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Saxena M, Stephens MA, Pathak H, Rangarajan A. Transcription factors that mediate epithelial-mesenchymal transition lead to multidrug resistance by upregulating ABC transporters. Cell Death Dis 2011; 2:e179. [PMID: 21734725 PMCID: PMC3199722 DOI: 10.1038/cddis.2011.61] [Citation(s) in RCA: 272] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Development of multidrug resistance (MDR) is a major deterrent in the effective treatment of metastatic cancers by chemotherapy. Even though MDR and cancer invasiveness have been correlated, the molecular basis of this link remains obscure. We show here that treatment with chemotherapeutic drugs increases the expression of several ATP binding cassette transporters (ABC transporters) associated with MDR, as well as epithelial–mesenchymal transition (EMT) markers, selectively in invasive breast cancer cells, but not in immortalized or non-invasive cells. Interestingly, the mere induction of an EMT in immortalized and non-invasive cell lines increased their expression of ABC transporters, migration, invasion, and drug resistance. Conversely, reversal of EMT in invasive cells by downregulating EMT-inducing transcription factors reduced their expression of ABC transporters, invasion, and rendered them more chemosensitive. Mechanistically, we demonstrate that the promoters of ABC transporters carry several binding sites for EMT-inducing transcription factors, and overexpression of Twist, Snail, and FOXC2 increases the promoter activity of ABC transporters. Furthermore, chromatin immunoprecipitation studies revealed that Twist binds directly to the E-box elements of ABC transporters. Thus, our study identifies EMT inducers as novel regulators of ABC transporters, thereby providing molecular insights into the long-standing association between invasiveness and MDR. Targeting EMT transcription factors could hence serve as novel strategies to curb both metastasis and the associated drug resistance.
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Affiliation(s)
- M Saxena
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore 560012, Karnataka, India
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Saxena M, Young P, Beasley R, Bailey M, Bellomo R, Pilcher D, Finfer S, Harrison D, Myburgh J, Rowan K. Early peak temperature and mortality in critically ill patients with or without infection. Crit Care 2011. [PMCID: PMC3239267 DOI: 10.1186/cc10393] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Parthiepan S, O’Brien C, Rode J, Thomas S, Arbuckle S, Saxena M, Prowse A, Jeffery H. 45. Placental pathology in indigenous and non-indigenous women in the northern territory. Pathology 2011. [DOI: 10.1016/s0031-3025(16)33333-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Bid HK, Konwar R, Saxena M, Chaudhari P, Agrawal CG, Banerjee M. Association of glutathione S-transferase (GSTM1, T1 and P1) gene polymorphisms with type 2 diabetes mellitus in north Indian population. J Postgrad Med 2010; 56:176-81. [PMID: 20739761 DOI: 10.4103/0022-3859.68633] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Diabetes mellitus is associated with an increased production of reactive oxygen species (ROS) and a reduction in antioxidant defense. The oxidative stress becomes evident as a result of accumulation of ROS in conditions of inflammation and Type 2 diabetes mellitus (T2DM). The genes involved in redox balance, which determines the susceptibility to T2DM remain unclear. In humans, the glutathione S-transferase (GST) family comprises several classes of GST isozymes, the polymorphic variants of GSTM1, T1 and P1 genes result in decreased or loss of enzyme activity. AIMS The present study evaluated the effect of genetic polymorphisms of the GST gene family on the risk of developing T2DM in the North Indian population. SETTINGS AND DESIGN GSTM1, T1 and P1 polymorphisms were genotyped in 100 T2DM patients and 200 healthy controls from North India to analyze their association with T2DM susceptibility. MATERIALS AND METHODS Analysis of GSTM1 and GSTT1 gene polymorphisms was performed by multiplex polymerase chain reaction (PCR) and GSTP1 by PCR-Restriction Fragment Length Polymorphism (RFLP). STATISTICAL ANALYSIS Fisher's exact test and chi2 statistics using SPSS software (Version-15.0). RESULTS We observed significant association of GSTM1 null (P=0.004, OR= 2.042, 95%CI= 1.254-3.325) and GSTP1 (I/V) (P=0.001, OR= 0.397, 95%CI=0.225-0.701) with T2DM and no significant association with GSTT1 (P=0.493). The combined analysis of the three genotypes GSTM1 null, T1 present and P1 (I/I) demonstrated an increase in T2DM risk (P= 0.005, OR= 2.431 95% CI=1.315-4.496). CONCLUSIONS This is the first study showing the association of a combined effect of GSTM1, T1 and P1 genotypes in a representative cohort of Indian patients with T2DM. Since significant association was seen in GSTM1 null and GSTP1 (I/V) and multiple association in GSTM1 null, T1 present and P1 (I/I), these polymorphisms can be screened in the population to determine the diabetic risk.
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Affiliation(s)
- H K Bid
- Molecular & Human Genetics Laboratory, Department of Zoology, University of Lucknow, Lucknow, India
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Saxena M, Negi MP, Singh S, Singh PK, Singh U, Bhatt MLB. DNA content can improve the detection and prognosis of carcinoma of the cervix. Biosci Trends 2010; 4:103-109. [PMID: 20592460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In all malignant diseases, several clinical and histopathological tests are established as standard methods for diagnosis. Alternative diagnostic quantitative methods are still lacking or conflicting in cancer of the cervix. Although DNA analysis was one of the earliest applications in flow cytometry and the DNA content of fresh/frozen tissue have shown good prognostic results in many diseases including cervical cancer, prognostic ability cannot be easily clarified quantitatively by biochemical values. Thus, our objective was to determine whether the addition of a DNA content study using flow cytometry improves the detection of cervix cancer. The quantification of DNA content was done by high resolution DNA flow cytometry in fresh/frozen tissues of healthy cervix (control, n = 38) and from cancer of the cervix (n = 62). Results show that the mean fraction of Total S phase, Total Aneuploid and G2-M (Diploid) are significantly higher (p < 0.01); while G0-G1 (Diploid) and G0-G1 (Aneuploid) are significantly lower (p < 0.01) in cancer patients as compared to control. Among cell cycle parameters, G0-G1 (Diploid) shows a classifying ability of 97% and at a criterion/threshold value of ? 79.88, it discriminates cases with the highest sensitivity of 96.77 (88.8-99.5; 95% CI) and specificity 100.0 (90.7-100.0; 95% CI) and with Total S phase or Aneuploid, it discriminates cases with 100% sensitivity. G0-G1 (Diploid) also showed a direct and significant correlation (r = 0.66; p < 0.01) with patient survival indicating prognostic significance. Cell cycle parameters will be very helpful in false positive results or where the clinician is unable to diagnose the stage of cervix cancer clinically or histopathologically.
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Abstract
We present the diurnal and seasonal variability of ambient NH3, NO, NO2 and SO2 over Delhi, India. Ambient NH3, NO and NO2 were measured continuously during winter, summer and autumn seasons using NH3- and NOx-analyzer, which operates by chemiluminescence method with a higher estimation efficiency (> 90%) than the chemical trap method (reproducibility 4.7%). Prominent diurnal, day-to-day and seasonal variations of ambient mixing ratio of NH3, NO, NO2 and SO2 were observed during the study period. Seasonal variation with higher mixing ratio in winter was observed for all measured trace gases except NO. Day-night variation of all measured trace gases observed was higher in winter in comparison with summer. Late morning increase in NO2 mixing ratio might be attributed to conversion of NO to NO2 with the interaction of O3.
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Affiliation(s)
- S K Sharma
- Radio and Atmospheric Sciences Division, National Physical Laboratory, Council of Scientific and Industrial Research, Dr KS Krishnan Road, New Delhi-ll0 012, India.
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Sharma S, Saxena M, Mandal T, Ahammed Y, Pathak H. Variations in Mixing Ratios of Ambient Ammonia, Nitric Oxide and Nitrogen Dioxide in Different Environments of India. ACTA ACUST UNITED AC 2010. [DOI: 10.4172/2157-7617.1000102] [Citation(s) in RCA: 2] [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: 11/09/2022]
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Redhu S, Jalwal G, Saxena M, Shrivastava OP. A comparative study of induction, maintenance and recovery characteristics of sevoflurane and halothane anaesthesia in pediatric patients (6 months to 6 years). J Anaesthesiol Clin Pharmacol 2010. [DOI: 10.4103/0970-9185.74591] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Siddique RA, Saxena M, Lakhchaura BD. PCR based rapid detection of Salmonella from poultry samples. Indian J Public Health 2009; 53:226-228. [PMID: 20469760] [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: 05/29/2023] Open
Abstract
Salmonella is very important from the zoonotic point of view, as it causes many diseases in animals and humans. This study was conducted during September 2005 to February 2006 to develop rapid detection system for Salmonella from poultry samples. In the present study 300 poultry samples were screened for Salmonella. Earlier, isolation and identification of Salmonella from clinical samples by traditional cultural techniques required laborious procedures which can last upto 7 days, whereas amplification of DNA sequences unique to an organism using the PCR improves both the speed of detection and the level of sensitivity at which organisms can be detected and has been increasingly used to identify several bacterial species from food and clinical samples. In this study Salmonella were rapidly detected by targeting invA gene, giving PCR product of 284 bp size. Therefore this technique can be used for the screening of Salmonella in the routine testing.
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Affiliation(s)
- R A Siddique
- Veterinary Biochemistry, C.V.Sc. & A.H., NavsariAgricultural University, Gujarat, India.
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Sundaresan NR, Saxena VK, Sastry KVH, Nagarajan K, Jain P, Singh R, Anish D, Ravindra PV, Saxena M, Ahmed KA. Cytokines and chemokines in postovulatory follicle regression of domestic chicken (Gallus gallus domesticus). Dev Comp Immunol 2008; 32:253-64. [PMID: 17692913 DOI: 10.1016/j.dci.2007.05.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2006] [Revised: 05/30/2007] [Accepted: 05/30/2007] [Indexed: 05/16/2023]
Abstract
The mechanism of postovulatory follicle (POF) regression in birds is still poorly understood. In the current study, expression of IL-1beta, IL-6, GM-CSF, IFN-gamma, IL-2, IL-4, IL-13, chCXCLi2, chCCLi2, chCCLi4, chCCLi7, IL-10 and TGF-beta2 mRNAs was estimated in regressing POF by semi-quantitative RT-PCR. In addition, the changes in immune cell population, histological and apoptotic changes were also studied in regressing POF. The expression of cytokines (IL-1beta, IL-6, IL-10 and TGF-beta2) and chemokines (chCXCLi2, chCCLi2, chCCLi4 and chCCLi7) was upregulated in POFs, suggesting a role for these molecules in tissue regression. The histological findings suggested a significant infiltration of immune cells, especially heterophils, lymphocytes and macrophages, into the regressing POF. The flow cytometry analysis of lymphocyte subpopulations revealed that CD3(+), CD4(+), CD8(+) and Bu-1(+) lymphocytes were significantly increased during this regression. The significant up-regulation of chemokines might have attracted the immune cells during POF regression. The percentage of apoptotic cells was significantly increased during the regression of POF. The up-regulation of IL-1beta, IL-6, IL-10 and TGF-beta2 and down-regulation of GM-CSF might have induced apoptosis during the POF regression. However, expression of IFN-gamma, IL-2, IL-4 and IL-13 was not significantly altered during POF regression. In conclusion, cytokines appear to play an important role in the regression of POF in chicken. Furthermore, the regression of chicken POF seems to be an inflammatory event similar to luteolysis of the mammalian corpus luteum.
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Affiliation(s)
- N R Sundaresan
- Disease Genetics and Biotechnology Laboratory, Central Avian Research Institute, Izatnagar-243122, Bareilly, India.
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Abstract
G-Protein coupled receptors (GPCRs), one of the most important families of drug targets, belong to the super family of integral membrane proteins characterized by seven transmembrane helices. Because they are difficult to crystallize, the three dimensional structure of these receptors have not yet been determined by X-ray crystallography, except one. In the absence of a 3-D structure, in-silico approaches for solving the structure of this class of proteins are widely used and provide valuable information for structure based drug design. There are several web servers and computer programs available that automate the modelling process of GPCRs. Some of these include Modeller, Swiss-Model server, Homer, etc. Using these tools reliable homology models of human histamine H1 receptor (HRH1) and thrombin receptor (PAR-1) have been generated which explain the binding mode of the standard antagonists of these receptors and may be useful in designing their novel antagonists.
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Affiliation(s)
- A K Saxena
- Division of Medicinal and Process Chemistry, Central Drug Research Institute Chattar Manzil Palace, Lucknow, India.
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Ahmed KA, Saxena VK, Ara A, Singh KB, Sundaresan NR, Saxena M, Rasool TJ. Immune response to Newcastle disease virus in chicken lines divergently selected for cutaneous hypersensitivity. Int J Immunogenet 2007; 34:445-55. [DOI: 10.1111/j.1744-313x.2007.00722.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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