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Collar JI, Cooper PS, Lewis CM. Search for a Nonrelativistic Boson in Two-Body Antimuon Decay. Phys Rev Lett 2023; 131:241802. [PMID: 38181129 DOI: 10.1103/physrevlett.131.241802] [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] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 11/17/2023] [Indexed: 01/07/2024]
Abstract
We demonstrate the feasibility of probing the charged lepton-flavor-violating decay μ^{+}→e^{+}X^{0} for the presence of a slow-moving neutral boson X^{0} capable of undergoing gravitational binding to large structures and, as such, able to participate in some cosmological scenarios. A short exposure to surface antimuons from beam line M20 at TRIUMF generates a branching ratio limit of ≲10^{-5}. This is comparable to or better than previous searches for this channel, although in a thus-far-unexplored region of X^{0} phase space very close to the kinematic limit of the decay, where m_{X^{0}} approaches m_{μ^{+}}. The future improved sensitivity of the method using a customized p-type point-contact germanium detector is described.
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Affiliation(s)
- J I Collar
- Enrico Fermi Institute, Kavli Institute for Cosmological Physics, and Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Donostia International Physics Center (DIPC), Paseo Manuel Lardizabal 4, 20018 Donostia-San Sebastian, Spain
| | - P S Cooper
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - C M Lewis
- Enrico Fermi Institute, Kavli Institute for Cosmological Physics, and Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Donostia International Physics Center (DIPC), Paseo Manuel Lardizabal 4, 20018 Donostia-San Sebastian, Spain
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Amole C, Ardid M, Arnquist IJ, Asner DM, Baxter D, Behnke E, Bhattacharjee P, Borsodi H, Bou-Cabo M, Campion P, Cao G, Chen CJ, Chowdhury U, Clark K, Collar JI, Cooper PS, Crisler M, Crowder G, Dahl CE, Das M, Fallows S, Farine J, Felis I, Filgas R, Girard F, Giroux G, Hall J, Harris O, Hoppe EW, Jin M, Krauss CB, Laurin M, Lawson I, Leblanc A, Levine I, Lippincott WH, Mamedov F, Maurya D, Mitra P, Nania T, Neilson R, Noble AJ, Olson S, Ortega A, Plante A, Podviyanuk R, Priya S, Robinson AE, Roeder A, Rucinski R, Scallon O, Seth S, Sonnenschein A, Starinski N, Štekl I, Tardif F, Vázquez-Jáuregui E, Wells J, Wichoski U, Yan Y, Zacek V, Zhang J. Dark Matter Search Results from the PICO-60 C_{3}F_{8} Bubble Chamber. Phys Rev Lett 2017; 118:251301. [PMID: 28696731 DOI: 10.1103/physrevlett.118.251301] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Indexed: 06/07/2023]
Abstract
New results are reported from the operation of the PICO-60 dark matter detector, a bubble chamber filled with 52 kg of C_{3}F_{8} located in the SNOLAB underground laboratory. As in previous PICO bubble chambers, PICO-60 C_{3}F_{8} exhibits excellent electron recoil and alpha decay rejection, and the observed multiple-scattering neutron rate indicates a single-scatter neutron background of less than one event per month. A blind analysis of an efficiency-corrected 1167-kg day exposure at a 3.3-keV thermodynamic threshold reveals no single-scattering nuclear recoil candidates, consistent with the predicted background. These results set the most stringent direct-detection constraint to date on the weakly interacting massive particle (WIMP)-proton spin-dependent cross section at 3.4×10^{-41} cm^{2} for a 30-GeV c^{-2} WIMP, more than 1 order of magnitude improvement from previous PICO results.
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Affiliation(s)
- C Amole
- Department of Physics, Queen's University, Kingston K7L 3N6, Canada
| | - M Ardid
- Departament de Física Aplicada, IGIC-Universitat Politècnica de València, Gandia 46730 Spain
| | - I J Arnquist
- Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - D M Asner
- Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - D Baxter
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - E Behnke
- Department of Physics, Indiana University South Bend, South Bend, Indiana 46634, USA
| | - P Bhattacharjee
- Astroparticle Physics and Cosmology Division, Saha Institute of Nuclear Physics, Kolkata 700064, India
| | - H Borsodi
- Department of Physics, Indiana University South Bend, South Bend, Indiana 46634, USA
| | - M Bou-Cabo
- Departament de Física Aplicada, IGIC-Universitat Politècnica de València, Gandia 46730 Spain
| | - P Campion
- Department of Physics, Drexel University, Philadelphia, Pennsylvania 19104, USA
| | - G Cao
- Department of Physics, Queen's University, Kingston K7L 3N6, Canada
| | - C J Chen
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA
| | - U Chowdhury
- Department of Physics, Queen's University, Kingston K7L 3N6, Canada
| | - K Clark
- Department of Physics, Laurentian University, Sudbury P3E 2C6, Canada
- SNOLAB, Lively, Ontario P3Y 1N2, Canada
| | - J I Collar
- Enrico Fermi Institute, KICP and Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - P S Cooper
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - M Crisler
- Pacific Northwest National Laboratory, Richland, Washington 99354, USA
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - G Crowder
- Department of Physics, Queen's University, Kingston K7L 3N6, Canada
| | - C E Dahl
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - M Das
- Astroparticle Physics and Cosmology Division, Saha Institute of Nuclear Physics, Kolkata 700064, India
| | - S Fallows
- Department of Physics, University of Alberta, Edmonton T6G 2E1, Canada
| | - J Farine
- Department of Physics, Laurentian University, Sudbury P3E 2C6, Canada
| | - I Felis
- Departament de Física Aplicada, IGIC-Universitat Politècnica de València, Gandia 46730 Spain
| | - R Filgas
- Institute of Experimental and Applied Physics, Czech Technical University in Prague, Prague, Cz-12800, Czech Republic
| | - F Girard
- Department of Physics, Laurentian University, Sudbury P3E 2C6, Canada
- Département de Physique, Université de Montréal, Montréal H3C 3J7, Canada
| | - G Giroux
- Department of Physics, Queen's University, Kingston K7L 3N6, Canada
| | - J Hall
- Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - O Harris
- Department of Physics, Indiana University South Bend, South Bend, Indiana 46634, USA
- Northeastern Illinois University, Chicago, Illinois 60625, USA
| | - E W Hoppe
- Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - M Jin
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA
| | - C B Krauss
- Department of Physics, University of Alberta, Edmonton T6G 2E1, Canada
| | - M Laurin
- Département de Physique, Université de Montréal, Montréal H3C 3J7, Canada
| | - I Lawson
- Department of Physics, Laurentian University, Sudbury P3E 2C6, Canada
- SNOLAB, Lively, Ontario P3Y 1N2, Canada
| | - A Leblanc
- Department of Physics, Laurentian University, Sudbury P3E 2C6, Canada
| | - I Levine
- Department of Physics, Indiana University South Bend, South Bend, Indiana 46634, USA
| | - W H Lippincott
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - F Mamedov
- Institute of Experimental and Applied Physics, Czech Technical University in Prague, Prague, Cz-12800, Czech Republic
| | - D Maurya
- Bio-Inspired Materials and Devices Laboratory (BMDL), Center for Energy Harvesting Material and Systems (CEHMS), Virginia Tech, Blacksburg, Virginia 24061, USA
| | - P Mitra
- Department of Physics, University of Alberta, Edmonton T6G 2E1, Canada
| | - T Nania
- Department of Physics, Indiana University South Bend, South Bend, Indiana 46634, USA
| | - R Neilson
- Department of Physics, Drexel University, Philadelphia, Pennsylvania 19104, USA
| | - A J Noble
- Department of Physics, Queen's University, Kingston K7L 3N6, Canada
| | - S Olson
- Department of Physics, Queen's University, Kingston K7L 3N6, Canada
| | - A Ortega
- Enrico Fermi Institute, KICP and Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - A Plante
- Département de Physique, Université de Montréal, Montréal H3C 3J7, Canada
| | - R Podviyanuk
- Department of Physics, Laurentian University, Sudbury P3E 2C6, Canada
| | - S Priya
- Bio-Inspired Materials and Devices Laboratory (BMDL), Center for Energy Harvesting Material and Systems (CEHMS), Virginia Tech, Blacksburg, Virginia 24061, USA
| | - A E Robinson
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - A Roeder
- Department of Physics, Indiana University South Bend, South Bend, Indiana 46634, USA
| | - R Rucinski
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - O Scallon
- Department of Physics, Laurentian University, Sudbury P3E 2C6, Canada
| | - S Seth
- Astroparticle Physics and Cosmology Division, Saha Institute of Nuclear Physics, Kolkata 700064, India
| | - A Sonnenschein
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - N Starinski
- Département de Physique, Université de Montréal, Montréal H3C 3J7, Canada
| | - I Štekl
- Institute of Experimental and Applied Physics, Czech Technical University in Prague, Prague, Cz-12800, Czech Republic
| | - F Tardif
- Département de Physique, Université de Montréal, Montréal H3C 3J7, Canada
| | - E Vázquez-Jáuregui
- Department of Physics, Laurentian University, Sudbury P3E 2C6, Canada
- Instituto de Física, Universidad Nacional Autónoma de México, México D. F. 01000, Mexico
| | - J Wells
- Department of Physics, Indiana University South Bend, South Bend, Indiana 46634, USA
| | - U Wichoski
- Department of Physics, Laurentian University, Sudbury P3E 2C6, Canada
| | - Y Yan
- Bio-Inspired Materials and Devices Laboratory (BMDL), Center for Energy Harvesting Material and Systems (CEHMS), Virginia Tech, Blacksburg, Virginia 24061, USA
| | - V Zacek
- Département de Physique, Université de Montréal, Montréal H3C 3J7, Canada
| | - J Zhang
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA
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Conn VS, Ruppar TM, Enriquez M, Cooper PS, Chan KC. Healthcare provider targeted interventions to improve medication adherence: systematic review and meta-analysis. Int J Clin Pract 2015; 69:889-99. [PMID: 25728214 PMCID: PMC5673083 DOI: 10.1111/ijcp.12632] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVE This systematic review applied meta-analytic procedures to synthesise medication adherence (also termed compliance) interventions that focus on healthcare providers. DESIGN Comprehensive searching located studies testing interventions that targeted healthcare providers and reported patient medication adherence behaviour outcomes. Search strategies included 13 computerised databases, hand searches of 57 journals, and both author and ancestry searches. Study sample, intervention characteristics, design and outcomes were reliably coded. Standardised mean difference effect sizes were calculated using random-effects models. Heterogeneity was examined with Q and I(2) statistics. Exploratory moderator analyses used meta-analytic analogue of ANOVA and regression. RESULTS Codable data were extracted from 218 reports of 151,182 subjects. The mean difference effect size was 0.233. Effect sizes for individual interventions varied from 0.088 to 0.301. Interventions were more effective when they included multiple strategies. Risk of bias assessment documented larger effect sizes in studies with larger samples, studies that used true control groups (as compared with attention control), and studies without intention-to-treat analyses. CONCLUSION Overall, this meta-analysis documented that interventions targeted to healthcare providers significantly improved patient medication adherence. The modest overall effect size suggests that interventions addressing multiple levels of influence on medication adherence may be necessary to achieve therapeutic outcomes.
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Affiliation(s)
- V S Conn
- School of Nursing, University of Missouri, Columbia, MO, USA
| | - T M Ruppar
- School of Nursing, University of Missouri, Columbia, MO, USA
| | - M Enriquez
- School of Nursing, University of Missouri, Columbia, MO, USA
| | - P S Cooper
- School of Nursing, University of Missouri, Columbia, MO, USA
| | - K C Chan
- School of Nursing, University of Missouri, Columbia, MO, USA
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Amole C, Ardid M, Asner DM, Baxter D, Behnke E, Bhattacharjee P, Borsodi H, Bou-Cabo M, Brice SJ, Broemmelsiek D, Clark K, Collar JI, Cooper PS, Crisler M, Dahl CE, Das M, Debris F, Dhungana N, Farine J, Felis I, Filgas R, Fines-Neuschild M, Girard F, Giroux G, Hai M, Hall J, Harris O, Jackson CM, Jin M, Krauss C, Lafrenière M, Laurin M, Lawson I, Levine I, Lippincott WH, Mann E, Martin JP, Maurya D, Mitra P, Neilson R, Noble AJ, Plante A, Podviyanuk R, Priya S, Robinson AE, Ruschman M, Scallon O, Seth S, Sonnenschein A, Starinski N, Štekl I, Vázquez-Jáuregui E, Wells J, Wichoski U, Zacek V, Zhang J. PICASSO, COUPP and PICO - search for dark matter with bubble chambers. EPJ Web of Conferences 2015. [DOI: 10.1051/epjconf/20159504020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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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Cooper PS. Altered expression of the xenobiotic transporter P-glycoprotein in liver and liver tumours of mummichog Fundulus heteroclitus from a creosote-contaminated environment. Biomarkers 2013; 4:48-58. [PMID: 23898794 DOI: 10.1080/135475099230994] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
P-glycoproteins (Pgps) are involved in efflux of xenobiotics from drug-resistant cell lines and tumours, and in excretion of toxicants from normal tissues. Recently, investigators have proposed that Pgp activity contributes to resistance or tolerance of certain aquatic species to pollutants. In the present study using immunoblot and immunohistochemical techniques, we found elevation of Pgp in liver and liver tumours of creosote-resistant mummichog from a contaminated site in the Elizabeth River, Virginia. Immunoblots of mummichog liver extracts showed an immunoreactive band at 170 kDa and indicated two- to three-fold elevation of Pgp in livers of resistant fish relative to those from a reference site. Laboratory exposures of reference site fish to a model PAH (3-methylcholanthrene), however, produced no increase in liver Pgp levels as measured by immunoblot. Normal mummichog liver sections showed specific immunohistochemical staining for Pgp on the canalicular surface of hepatocytes. In the majority of hepatic neoplasms we observed a high level of over-expression and altered patterns of Pgp expression. However we did not observe Pgp over-expression in early proliferative lesions. Elevation of Pgp in livers and liver tumoursof these resistant mummichog may contribute to their survival in a heavily contaminated environment.
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Behnke E, Behnke J, Brice SJ, Broemmelsiek D, Collar JI, Cooper PS, Crisler M, Dahl CE, Fustin D, Hall J, Hinnefeld JH, Hu M, Levine I, Ramberg E, Shepherd T, Sonnenschein A, Szydagis M. Improved limits on spin-dependent WIMP-proton interactions from a two liter CF3I bubble chamber. Phys Rev Lett 2011; 106:021303. [PMID: 21405218 DOI: 10.1103/physrevlett.106.021303] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Indexed: 05/30/2023]
Abstract
Data from the operation of a bubble chamber filled with 3.5 kg of CF3I in a shallow underground site are reported. An analysis of ultrasound signals accompanying bubble nucleations confirms that alpha decays generate a significantly louder acoustic emission than single nuclear recoils, leading to an efficient background discrimination. Three dark matter candidate events were observed during an effective exposure of 28.1 kg day, consistent with a neutron background. This observation provides strong direct detection constraints on weakly interacting massive particle (WIMP)-proton spin-dependent scattering for WIMP masses >20 GeV/c2.
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Affiliation(s)
- E Behnke
- Indiana University South Bend, South Bend, Indiana, USA
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Artamonov AV, Bassalleck B, Bhuyan B, Blackmore EW, Bryman DA, Chen S, Chiang IH, Christidi IA, Cooper PS, Diwan MV, Frank JS, Fujiwara T, Hu J, Ives J, Jaffe DE, Kabe S, Kettell SH, Khabibullin MM, Khotjantsev AN, Kitching P, Kobayashi M, Komatsubara TK, Konaka A, Kozhevnikov AP, Kudenko YG, Kushnirenko A, Landsberg LG, Lewis B, Li KK, Littenberg LS, Macdonald JA, Mildenberger J, Mineev OV, Miyajima M, Mizouchi K, Mukhin VA, Muramatsu N, Nakano T, Nomachi M, Nomura T, Numao T, Obraztsov VF, Omata K, Patalakha DI, Petrenko SV, Poutissou R, Ramberg EJ, Redlinger G, Sato T, Sekiguchi T, Shinkawa T, Strand RC, Sugimoto S, Tamagawa Y, Tschirhart R, Tsunemi T, Vavilov DV, Viren B, Wang Z, Yershov NV, Yoshimura Y, Yoshioka T. New measurement of the K+-->pi+ nunu branching ratio. Phys Rev Lett 2008; 101:191802. [PMID: 19113260 DOI: 10.1103/physrevlett.101.191802] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2008] [Indexed: 05/27/2023]
Abstract
Three events for the decay K+-->pi+ nunu have been observed in the pion momentum region below the K+-->pi+pi0 peak, 140 < Ppi < 199 MeV/c, with an estimated background of 0.93+/-0.17(stat.) -0.24+0.32(syst.) events. Combining this observation with previously reported results yields a branching ratio of B(K+-->pi+ nunu) = (1.73(-1.05)+1.15) x 10(-10) consistent with the standard model prediction.
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Affiliation(s)
- A V Artamonov
- Institute for High Energy Physics, Protvino, Moscow Region, 142 280, Russia
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Behnke E, Collar JI, Cooper PS, Crum K, Crisler M, Hu M, Levine I, Nakazawa D, Nguyen H, Odom B, Ramberg E, Rasmussen J, Riley N, Sonnenschein A, Szydagis M, Tschirhart R. Spin-Dependent WIMP Limits from a Bubble Chamber. Science 2008; 319:933-6. [DOI: 10.1126/science.1149999] [Citation(s) in RCA: 116] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- E. Behnke
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - J. I. Collar
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - P. S. Cooper
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - K. Crum
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - M. Crisler
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - M. Hu
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - I. Levine
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - D. Nakazawa
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - H. Nguyen
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - B. Odom
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - E. Ramberg
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - J. Rasmussen
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - N. Riley
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - A. Sonnenschein
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - M. Szydagis
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - R. Tschirhart
- Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
- Department of Physics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
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Pogodin P, Alkhazov G, Atamantchouk AG, Balatz MY, Bondar NF, Cooper PS, Dauwe LJ, Davidenko GV, Dersch U, Dolgolenko AG, Dzyubenko GB, Edelstein R, Emediato L, Endler AF, Engelfried J, Eschrich I, Escobar CO, Evdokimov AV, Filimonov IS, Garcia FG, Gaspero M, Giller I, Golovtsov VL, Gouffon P, Gülmez E, He K, Iori M, Jun SY, Kaya M, Kilmer J, Kim VT, Kochenda LM, Konorov I, Kozhevnikov AP, Krivshich AG, Krüger H, Kubantsev MA, Kubarovsky VP, Kulyavtsev AI, Kuropatkin NP, Kurshetsov VF, Kushnirenko A, Kwan S, Lach J, Lamberto A, Landsberg LG, Larin I, Leikin EM, Li Y, Luksys M, Lungov T, Maleev VP, Mao C, Mao D, Mao Z, Mathew P, Mattson M, Matveev V, McCliment E, Moinester MA, Molchanov VV, Morelos A, Nelson KD, Nemitkin AV, Neoustroev PV, Newsom C, Nilov AP, Nurushev SB, Ocherashvili A, de Oliveira E, Onel Y, Ozel E, Ozkurucuklu S, Penzo A, Petrenko SV, Procario M, Prutskoi VA, Ramberg E, Rappazzo GF, Razmyslovich BV, Rud VI, Russ J, Schiavon P, Simon J, Sitnikov AI, Skow D, Smith VJ, Srivastava M, Steiner V, Stepanov V, Stutte L, Svoiski M, Terentyev NK, Thomas GP, Uvarov LN, Vasiliev AN, Vavilov DV, Verebryusov VS, Victorov VA, Vishnyakov VE, Vorobyov AA, Vorwalter K, You J, Zhao W, Zheng S, Zukanovich-Funchal R. Polarization ofΣ+hyperons produced by 800 GeV/c protons on Cu and Be. Int J Clin Exp Med 2004. [DOI: 10.1103/physrevd.70.112005] [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: 11/07/2022]
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Evdokimov AV, Akgun U, Alkhazov G, Amaro-Reyes J, Atamantchouk AG, Ayan AS, Balatz MY, Bondar NF, Cooper PS, Dauwe LJ, Davidenko GV, Dersch U, Dolgolenko AG, Dzyubenko GB, Edelstein R, Emediato L, Endler AMF, Engelfried J, Eschrich I, Escobar CO, Filimonov IS, Garcia FG, Gaspero M, Giller I, Golovtsov VL, Gouffon P, Gülmez E, Kangling H, Iori M, Jun SY, Kaya M, Kilmer J, Kim VT, Kochenda LM, Konorov I, Kozhevnikov AP, Krivshich AG, Krüger H, Kubantsev MA, Kubarovsky VP, Kulyavtsev AI, Kuropatkin NP, Kurshetsov VF, Kushnirenko A, Kwan S, Lach J, Lamberto A, Landsberg LG, Larin I, Leikin EM, Yunshan L, Luksys M, Lungov T, Maleev VP, Mao D, Chensheng M, Zhenlin M, Mathew P, Mattson M, Matveev V, McCliment E, Moinester MA, Molchanov VV, Morelos A, Nelson KD, Nemitkin AV, Neoustroev PV, Newsom C, Nilov AP, Nurushev SB, Ocherashvili A, Onel Y, Ozel E, Ozkorucuklu S, Penzo A, Petrenko SV, Pogodin P, Procario M, Ramberg E, Rappazzo GF, Razmyslovich BV, Rud VI, Russ J, Schiavon P, Simon J, Sitnikov AI, Skow D, Smith VJ, Srivastava M, Steiner V, Stepanov V, Stutte L, Svoiski M, Terentyev NK, Thomas GP, Torres I, Uvarov LN, Vasiliev AN, Vavilov DV, Vázquez-Jáuregui E, Verebryusov VS, Victorov VA, Vishnyakov VE, Vorobyov AA, Vorwalter K, You J, Wenheng Z, Shuchen Z, Zukanovich-Funchal R. Observation of a narrow charm-strange meson D(+)(sJ)(2632)-->D(+)(s)eta and D(0)K(+). Phys Rev Lett 2004; 93:242001. [PMID: 15697795 DOI: 10.1103/physrevlett.93.242001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2004] [Indexed: 05/24/2023]
Abstract
We report the first observation of a charm-strange meson D(+)(sJ)(2632) at a mass of 2632.5+/-1.7 MeV/c(2) in data from SELEX, the charm hadro-production experiment E781 at Fermilab. This state is seen in two decay modes, D(+)(s)eta and D0K+. In the D(+)(s)eta decay mode we observe a peak with 101 events over a combinatoric background of 54.9 events at a mass of 2635.4+/-3.3 MeV/c(2). There is a corresponding peak of 21 events over a background of 6.9 at 2631.5+/-2.0 MeV/c(2) in the decay mode D0K+. The decay width of this state is <17 MeV/c(2) at 90% confidence level. The relative branching ratio Gamma(D0K+)/Gamma(D(+)(s)eta) is 0.14+/-0.06. The mechanism that keeps this state narrow is unclear. Its decay pattern is also unusual, being dominated by the D(+)(s)eta decay mode.
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11
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Anisimovsky VV, Artamonov AV, Bassalleck B, Bhuyan B, Blackmore EW, Bryman DA, Chen S, Chiang IH, Christidi IA, Cooper PS, Diwan MV, Frank JS, Fujiwara T, Hu J, Ivashkin AP, Jaffe DE, Kabe S, Kettell SH, Khabibullin MM, Khotjantsev AN, Kitching P, Kobayashi M, Komatsubara TK, Konaka A, Kozhevnikov AP, Kudenko YG, Kushnirenko A, Landsberg LG, Lewis B, Li KK, Littenberg LS, Macdonald JA, Mildenberger J, Mineev OV, Miyajima M, Mizouchi K, Mukhin VA, Muramatsu N, Nakano T, Nomachi M, Nomura T, Numao T, Obraztsov VF, Omata K, Patalakha DI, Petrenko SV, Poutissou R, Ramberg EJ, Redlinger G, Sato T, Sekiguchi T, Shinkawa T, Strand RC, Sugimoto S, Tamagawa Y, Tschirhart R, Tsunemi T, Vavilov DV, Viren B, Yershov NV, Yoshimura Y, Yoshioka T. Improved measurement of the K+-->pi+nunu; branching ratio. Phys Rev Lett 2004; 93:031801. [PMID: 15323812 DOI: 10.1103/physrevlett.93.031801] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2004] [Indexed: 05/24/2023]
Abstract
An additional event near the upper kinematic limit for K+-->pi(+)nunu; has been observed by experiment E949 at Brookhaven National Laboratory. Combining previously reported and new data, the branching ratio is B(K+-->pi(+)nunu;)=(1.47(+1.30)(-0.89))x10(-10) based on three events observed in the pion momentum region 211<P<229 MeV/c. At the measured central value of the branching ratio, the additional event had a signal-to-background ratio of 0.9.
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Affiliation(s)
- V V Anisimovsky
- Institute for Nuclear Research RAS, 60 October Revolution Prospect 7a, 117312 Moscow, Russia
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12
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Mattson M, Alkhazov G, Atamantchouk AG, Balatz MY, Bondar NF, Cooper PS, Dauwe LJ, Davidenko GV, Dersch U, Dolgolenko AG, Dzyubenko GB, Edelstein R, Emediato L, Endler AMF, Engelfried J, Eschrich I, Escobar CO, Evdokimov AV, Filimonov IS, Garcia FG, Gaspero M, Giller I, Golovtsov VL, Gouffon P, Gülmez E, Kangling H, Iori M, Jun SY, Kaya M, Kilmer J, Kim VT, Kochenda LM, Konorov I, Kozhevnikov AP, Krivshich AG, Krüger H, Kubantsev MA, Kubarovsky VP, Kulyavtsev AI, Kuropatkin NP, Kurshetsov VF, Kushnirenko A, Kwan S, Lach J, Lamberto A, Landsberg LG, Larin I, Leikin EM, Yunshan L, Luksys M, Lungov T, Maleev VP, Mao D, Chensheng M, Zhenlin M, Mathew P, Matveev V, McCliment E, Moinester MA, Molchanov VV, Morelos A, Nelson KD, Nemitkin AV, Neoustroev PV, Newsom C, Nilov AP, Nurushev SB, Ocherashvili A, Oliveira E, Onel Y, Ozel E, Ozkorucuklu S, Penzo A, Petrenko SV, Pogodin P, Procario M, Prutskoi VA, Ramberg E, Rappazzo GF, Razmyslovich BV, Rud VI, Russ J, Schiavon P, Simon J, Sitnikov AI, Skow D, Smith VJ, Srivastava M, Steiner V, Stepanov V, Stutte L, Svoiski M, Terentyev NK, Thomas GP, Uvarov LN, Vasiliev AN, Vavilov DV, Verebryusov VS, Victorov VA, Vishnyakov VE, Vorobyov AA, Vorwalter K, You J, Wenheng Z, Shuchen Z, Zukanovich-Funchal R. First observation of the doubly charmed baryon Xi(+)(cc). Phys Rev Lett 2002; 89:112001. [PMID: 12225136 DOI: 10.1103/physrevlett.89.112001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2002] [Indexed: 05/23/2023]
Abstract
We observe a signal for the doubly charmed baryon Xi(+)(cc) in the charged decay mode Xi(+)(cc)-->Lambda(+)(c)K-pi(+) in data from SELEX, the charm hadroproduction experiment at Fermilab. We observe an excess of 15.9 events over an expected background of 6.1+/-0.5 events, a statistical significance of 6.3sigma. The observed mass of this state is 3519+/-1 MeV/c(2). The Gaussian mass width of this state is 3 MeV/c(2), consistent with resolution; its lifetime is less than 33 fs at 90% confidence.
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Affiliation(s)
- M Mattson
- Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213, USA
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13
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Abstract
The advancing technologies available to the orthopedist are a necessary adjunct to heal wounds about the foot and ankle successfully. Successful wound healing should be viewed as a multidisciplinary approach, using the strengths of each discipline. Critical to an integrated method is communication preoperatively between the orthopedist and the plastic surgeon to create a streamlined process. This leads not only to improved rates of wound healing, but also to improved functional outcomes while reducing risks for recurrence.
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Affiliation(s)
- P S Cooper
- Department of Orthopedics, Georgetown Foot and Ankle Center, Georgetown University Medical Center, 3800 Reservoir Road, NW, Washington, DC 27007, USA
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14
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Abstract
Arthrodesis has remained the mainstay for treating arthritis and deformities of the ankle and hindfoot for more than a century. Formidable technical challenges exist in achieving a successful result, leading to numerous complications as high as 50% in some series. The most frequent complications after tibiotalar and tibiotalocalcaneal arthrodesis involve nonunion, malunion, infection, and wound complications among others. Meticulous preoperative consideration for the technical and biologic issues involved may lead to diminished complication rates. With advances in implant technology, revision arthrodesis can, in most cases, be expected to yield outcomes comparable with those of a primary procedure. Algorithms for the treatment of the most frequent complications are presented.
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Affiliation(s)
- P S Cooper
- Department of Orthopaedic Surgery, Foot and Ankle Center, Georgetown University Medical Center, Washington, DC, USA
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15
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Kushnirenko A, Alkhazov G, Atamantchouk AG, Balatz MY, Bondar NF, Cooper PS, Dauwe LJ, Davidenko GV, Dersch U, Dolgolenko AG, Dzyubenko GB, Edelstein R, Emediato L, Endler AM, Engelfried J, Eschrich I, Escobar CO, Evdokimov AV, Filimonov IS, Garcia FG, Gaspero M, Giller I, Golovtsov VL, Gouffon P, Gülmez E, Kangling H, Iori M, Jun SY, Kaya M, Kilmer J, Kim VT, Kochenda LM, Konorov I, Kozhevnikov AP, Krivshich AG, Krüger H, Kubantsev MA, Kubarovsky VP, Kulyavtsev AI, Kuropatkin NP, Kurshetsov VF, Kwan S, Lach J, Lamberto A, Landsberg LG, Larin I, Leikin EM, Yunshan L, Luksys M, Lungov T, Maleev VP, Mao D, Chensheng M, Zhenlin M, Mathew P, Mattson M, Matveev V, McCliment E, Moinester MA, Molchanov VV, Morelos A, Nelson KD, Nemitkin AV, Neoustroev PV, Newsom C, Nilov AP, Nurushev SB, Ocherashvili A, Onel Y, Ozel E, Ozkorucuklu S, Penzo A, Petrenko SV, Pogodin P, Procario M, Prutskoi VA, Ramberg E, Rappazzo GF, Razmyslovich BV, Rud VI, Russ J, Schiavon P, Simon J, Sitnikov AI, Skow D, Smith VJ, Srivastava M, Steiner V, Stepanov V, Stutte L, Svoiski M, Terentyev NK, Thomas GP, Uvarov LN, Vasiliev AN, Vavilov DV, Verebryusov VS, Victorov VA, Vishnyakov VE, Vorobyov AA, Vorwalter K, You J, Wenheng Z, Shuchen Z, Zukanovich-Funchal R. Precision measurements of the lambda(+)(c) and D0 lifetimes. Phys Rev Lett 2001; 86:5243-5246. [PMID: 11384468 DOI: 10.1103/physrevlett.86.5243] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2000] [Indexed: 05/23/2023]
Abstract
We report new precision measurements of the lifetimes of the Lambda(+)(c) and D0 from SELEX, the charm hadroproduction experiment at Fermilab. Based upon 1630 Lambda(+)(c) and 10 210 D0 decays we observe lifetimes of tau[Lambda(+)(c)] = 198.1+/-7.0+/-5.6 fs and tau[D0] = 407.9+/-6.0+/-4.3 fs.
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Affiliation(s)
- A Kushnirenko
- Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213, USA
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16
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Lovekamp T, Cooper PS, Hardison J, Bryant SD, Guerrini R, Balboni G, Salvadori S, Lazarus LH. Inhibition of human multidrug resistance P-glycoprotein 1 by analogues of a potent δ-opioid antagonist. Brain Res 2001; 902:131-4. [PMID: 11376603 DOI: 10.1016/s0006-8993(01)02363-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Analogues Dmt-Tic (2',6'-dimethyl-L-tyrosine-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid) pharmacophore, a potent delta-opioid receptor antagonist, inhibited hMDR1 P-GP expressed in a G-185 fibroblast cell line in a manner similar to verapamil. N,N(Me)2-Dmt-Tic-NH-1-adamantane, H-Dmt-Tic-NH-1-adamantane, H-Dmt-Tic-Ala-NH-1-adamantane and N,N(Me)2-Dmt-Tic-NH-tBut were highly effective inhibitors. Weaker inhibition was observed with N,N(Et)2-Dmt-Tic-OH, H-Dmt-Tic-Ala-NH-tert-butyl amide and cyclo(Dmt-Tic). Results demonstrate that N- and C-terminal hydrophobic/lipophilic analogues of the Dmt-Tic pharmacophore inhibit hMDR1 and point to a potential role as chemosensitizing agents in chemotherapy for cancers containing hMDR1.
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Affiliation(s)
- T Lovekamp
- Peptide Neurochemistry Group, LCBRA, National Institute of Environmental Health Sciences, P.O. Box 12233, Research Triangle Park, NC 27709, USA
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17
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Nowak MD, Abu-Hasaballah KS, Cooper PS. Design enhancement of a solid ankle-foot orthosis: real-time contact pressures evaluation. J Rehabil Res Dev 2000; 37:273-81. [PMID: 10917259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
The purpose of our study was to evaluate all contact pressures between the molded ankle-foot orthosis (MAFO) and the subject during activities of daily living. The MAFOs studied are used clinically to reduce plantar contact pressures associated with foot ulcers in adult neuropathic diabetic subjects, alleviating abnormal pressures by redistributing them to low-pressure plantar regions. While effective, MAFOs are often not used by the subject due to weight and comfort issues. An understanding of the contact pressures between the subject and the orthosis is a first step in improving basic MAFO design. Four nonimpaired, young adult males were tested in this study. A right-side MAFO was custom-molded and fitted for each subject by the same orthotist. Real-time pressures were obtained for the entire contact area using the F-Scan pressure measurement system. The data obtained demonstrated high contact pressures along the metatarsals of the foot, around the heel and ankle, and adjacent to the strap attachment sites. No contact pressures were noted along the posterior calf region during any of the activities performed. These data suggest the calf region would be a suitable site for material removal for weight reduction and increased comfort, especially in warm weather. In addition, these data may be useful to orthotists in improving the basic design and to researchers as a starting point for performing complex finite element analysis on the MAFO.
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Affiliation(s)
- M D Nowak
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington 06030-6144, USA
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18
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Salvadori S, Guerrini R, Balboni G, Bianchi C, Bryant SD, Cooper PS, Lazarus LH. Further studies on the Dmt-Tic pharmacophore: hydrophobic substituents at the C-terminus endow delta antagonists to manifest mu agonism or mu antagonism. J Med Chem 1999; 42:5010-9. [PMID: 10585210 DOI: 10.1021/jm990165m] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Twenty N- and/or C-modified Dmt-Tic analogues yielded similar K(i) values with either [(3)H]DPDPE (delta(1) agonist) or [(3)H]N, N(Me)(2)-Dmt-Tic-OH (delta antagonist). N-Methylation enhanced delta antagonism while N-piperidine-1-yl, N-pyrrolidine-1-yl, and N-pyrrole-1-yl were detrimental. Dmt-Tic-X (X = -NHNH(2), -NHCH(3), -NH-1-adamantyl, -NH-tBu, -NH-5-tetrazolyl) had high delta affinities (K(i) = 0.16 to 1 nM) with variable mu affinities to yield nonselective or weakly mu-selective analogues. N, N-(Me)(2)Dmt-Tic-NH-1-adamantane exhibited dual delta and mu receptor affinities (K(i)delta = 0.16 nM and K(i)mu = 1.12 nM) and potent delta antagonism (pA(2) = 9.06) with mu agonism (IC(50) = 16 nM). H-Dmt-betaHTic-OH (methylene bridge between C(alpha) of Tic and carboxylate function) yielded a biostable peptide with high delta affinity (K(i) = 0.85 nM) and delta antagonism (pA(2) = 8.85) without mu bioactivity. Dmt-Tic-Ala-X (X = -NHCH(3), -OCH(3), -NH-1-adamantyl, -NHtBu) exhibited high delta affinities (K(i) = 0.06 to 0.2 nM) and elevated mu affinities (K(i) = 2.5 to 11 nM), but only H-Dmt-Tic-Ala-NH-1-adamantane and H-Dmt-Tic-Ala-NHtBu yielded delta receptor antagonism (pA(2) = 9.29 and 9.16, respectively). Thus, Dmt-Tic with hydrophobic C-terminal substituents enhanced mu affinity to provide delta antagonists with dual receptor affinities and bifunctional activity.
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MESH Headings
- Adamantane/analogs & derivatives
- Adamantane/chemical synthesis
- Adamantane/metabolism
- Adamantane/pharmacology
- Animals
- Binding, Competitive
- Brain/metabolism
- Dipeptides/chemical synthesis
- Dipeptides/metabolism
- Dipeptides/pharmacology
- Electric Stimulation
- Enkephalin, D-Penicillamine (2,5)-/metabolism
- Guinea Pigs
- Ileum/drug effects
- Male
- Methylation
- Mice
- Oligopeptides/chemical synthesis
- Oligopeptides/metabolism
- Oligopeptides/pharmacology
- Rats
- Receptors, Opioid, delta/antagonists & inhibitors
- Receptors, Opioid, delta/metabolism
- Receptors, Opioid, mu/agonists
- Receptors, Opioid, mu/antagonists & inhibitors
- Receptors, Opioid, mu/physiology
- Structure-Activity Relationship
- Synaptosomes/metabolism
- Tetrahydroisoquinolines
- Tritium
- Vas Deferens/drug effects
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Affiliation(s)
- S Salvadori
- Department of Pharmaceutical Science and Biotechnology Center, University of Ferrara, I-441000 Ferrara, Italy
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19
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Abstract
The deltorphins are a class of highly selective delta-opioid heptapeptides from the skin of the Amazonian frogs Phyllomedusa sauvagei and P. bicolor. The first of these fascinating peptides came to light in 1987 by cloning of the cDNA of from frog skins, while the other members of this family were identified either by cDNA or isolation of the peptides. The distinctive feature of deltorphins is the presence of a naturally occurring D-enantiomer at the second position in their common N-terminal sequence, Tyr-D-Xaa-Phe, comparable to dermorphin, which is the prototype of a group of mu-selective opioids from the same source. The D-amino acid and the anionic residues, either Glu or Asp, as well as their unique amino acid compositions are responsible for the remarkable biostability, high delta-receptor affinity, bioactivity and peptide conformation. This review summarizes a decade of research from many laboratories that defined which residues and substituents in the deltorphins interact with the delta-receptor and characterized pharmacological and physiological activities in vitro and in vivo. It begins with a historical description of the topic and presents general schema for the synthesis of peptide analogues of deltorphins A, B and C as a means to document the methods employed in producing a myriad of analogues. Structure activity studies of the peptides and their pharmacological activities in vitro are detailed in abundantly tabulated data. A brief compendium of the current level of knowledge of the delta-receptor assists the reader to appreciate the rationale for the design of these analogues. Discussion of the conformation of these peptides addresses how structure leads to further hypotheses regarding ligand receptor interaction. The review ends with a broad discussion of the potential applications of these peptides in clinical and therapeutic settings.
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Affiliation(s)
- L H Lazarus
- Peptide Neurochemistry, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
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20
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Abstract
Thirty-one cases of flexor hallucis longus injuries in 26 patients were treated over a 16-year period (1977-1993). Groups were divided into dance-related injuries (group I) and other causes (group II). The two groups were compared with regard to age, activity, duration of symptoms, operative findings, histopathology, and postoperative time to resumption of full activities. Twenty-seven cases required surgery for unsuccessful nonoperative treatment. In group I, 71% of patients had a partial longitudinal tear of the flexor hallucis longus compared with 30% in group II. Another common finding was isolated tenosynovitis (21% in group I and 53% in group II). Eight cases had magnetic resonance imaging (MRI) evaluations before surgery. Clinical correlation was found to be an important factor in interpreting the MRI. Dancers tended to have symptoms for a longer period of time before seeking treatment than did nondancers. Follow-up was 19.2 months for dancers and 25 months for nondancers. Surgical correction of tenosynovitis, pseudocyst, and tendon tear yielded good or excellent results in 14 of 15 dancers and 9 of 11 nondancers. Surgical treatment of tendon tears and other pathologic tendon conditions gave consistently good results in patients with refractory flexor hallucis longus disease.
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Affiliation(s)
- G J Sammarco
- Department of Orthopaedics, University of Cincinnati, Ohio, USA
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21
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Affiliation(s)
- S D Bryant
- National Institute of Environmental Health Sciences, Research Triangle Park, NC 22709, USA
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22
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Guerrini R, Capasso A, Marastoni M, Bryant SD, Cooper PS, Lazarus LH, Temussi PA, Salvadori S. Rational design of dynorphin A analogues with delta-receptor selectivity and antagonism for delta- and kappa-receptors. Bioorg Med Chem 1998; 6:57-62. [PMID: 9502105 DOI: 10.1016/s0968-0896(97)10008-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Substitution of 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (Tic) in place of Gly2 in dynorphin A-(1-13)-NH2 and -(1-11)-NH2 (DYN) analogues (1 and 2) decreased the affinity to the kappa, delta, and mu receptors, and kappa selectivity. The analogue [D-Ala2, des-Gly3]DYN (4), a chimera between deltorphin/dermorphin N-terminal tripeptide and DYN, was virtually inactive for kappa-sites while the affinities for delta- and mu-receptors remained essentially unchanged. The doubly substituted analogue [2',6'-dimethyl-L-tyrosine (Dmt1)-Tic2]DYN (3) exhibited high delta-affinity (Ki=0.39 nM) while mu- and kappa-affinities were only an order of magnitude less (4-5 nM). Bioactivity of [Tic2]DYN peptides (1-3) on guinea-pig ileum and rabbit jejunum revealed potent delta- and kappa-antagonism, while the delta agonist potency of 4 was comparable to DYN. Thus, conversion from a kappa-agonist to antagonist occurred with the inclusion of Tic into DYN analogues, similar to the appearance of antagonist properties with delta- and mu-opioid agonists containing a Tic2 residue.
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MESH Headings
- Analgesics, Opioid/chemical synthesis
- Analgesics, Opioid/pharmacology
- Animals
- Dose-Response Relationship, Drug
- Drug Design
- Dynorphins/chemical synthesis
- Dynorphins/pharmacology
- Electrophysiology
- Guinea Pigs
- Ileum
- Isoquinolines/chemistry
- Muscle Contraction/drug effects
- Muscle, Smooth/drug effects
- Oligopeptides/chemistry
- Peptide Fragments/chemical synthesis
- Peptide Fragments/pharmacology
- Rabbits
- Receptors, Opioid, delta/antagonists & inhibitors
- Receptors, Opioid, kappa/antagonists & inhibitors
- Receptors, Opioid, mu/antagonists & inhibitors
- Structure-Activity Relationship
- Tetrahydroisoquinolines
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Affiliation(s)
- R Guerrini
- Department of Pharmaceutical Sciences and Biotechnology Center, University of Ferrara, Italy
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23
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Shamburek RD, Pentchev PG, Zech LA, Blanchette-Mackie J, Carstea ED, VandenBroek JM, Cooper PS, Neufeld EB, Phair RD, Brewer HB, Brady RO, Schwartz CC. Intracellular trafficking of the free cholesterol derived from LDL cholesteryl ester is defective in vivo in Niemann-Pick C disease: insights on normal metabolism of HDL and LDL gained from the NP-C mutation. J Lipid Res 1997. [DOI: 10.1016/s0022-2275(20)30027-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Shamburek RD, Pentchev PG, Zech LA, Blanchette-Mackie J, Carstea ED, VandenBroek JM, Cooper PS, Neufeld EB, Phair RD, Brewer HB, Brady RO, Schwartz CC. Intracellular trafficking of the free cholesterol derived from LDL cholesteryl ester is defective in vivo in Niemann-Pick C disease: insights on normal metabolism of HDL and LDL gained from the NP-C mutation. J Lipid Res 1997; 38:2422-35. [PMID: 9458266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Niemann-Pick C disease (NP-C) is a rare inborn error of metabolism with hepatic involvement and neurological sequelae that usually manifest in childhood. Although in vitro studies have shown that the lysosomal distribution of LDL-derived cholesterol is defective in cultured cells of NP-C subjects, no unusual characteristics mark the plasma lipoprotein profiles. We set out to determine whether anomalies exist in vivo in the cellular distribution of newly synthesized, HDL-derived or LDL-derived cholesterol under physiologic conditions in NP-C subjects. Three affected and three normal male subjects were administered [14C]mevalonate as a tracer of newly synthesized cholesterol and [3H]cholesteryl linoleate in either HDL or LDL to trace the distribution of lipoprotein-derived free cholesterol. The rate of appearance of free [14C]- and free [3H]cholesterol in the plasma membrane was detected indirectly by monitoring their appearance in plasma and bile. The plasma disappearance of [3H]cholesteryl linoleate was slightly faster in NP-C subjects regardless of its lipoprotein origin. Appearance of free [14C] cholesterol ill the plasma (and in bile) was essentially identical in normal and affected individuals as was the initial appearance of free [3H]cholesterol derived from HDL, observed before extensive exchange occurred of the [3H]cholesteryl linoleate among lipoproteins. In contrast, the rate of appearance of LDL-derived free [3H]cholesterol in the plasma membrane of NP-C subjects, as detected in plasma and bile, was retarded to a similar extent that LDL cholesterol metabolism was defective in cultured fibroblasts of these affected subjects. These findings show that intracellular distribution of both newly synthesized and HDL-derived cholesterol are essentially unperturbed by the NP-C mutation, and therefore occur by lysosomal-independent paths. In contrast, in NP-C there is defective trafficking of LDL-derived cholesterol to the plasma membrane in vivo as well as in vitro. The in vivo assay of intracellular cholesterol distribution developed herein should prove useful to quickly evaluate therapeutic interventions for NP-C.
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Affiliation(s)
- R D Shamburek
- Molecular Disease Branch, National Institutes of Health, Bethesda, MD 20892, USA
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Salvadori S, Balboni G, Guerrini R, Tomatis R, Bianchi C, Bryant SD, Cooper PS, Lazarus LH. Evolution of the Dmt-Tic pharmacophore: N-terminal methylated derivatives with extraordinary delta opioid antagonist activity. J Med Chem 1997; 40:3100-8. [PMID: 9301674 DOI: 10.1021/jm9607663] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The delta opioid antagonist H-Dmt-Tic-OH (2',6'-dimethyl-L-tyrosyl-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid) exhibits extraordinary delta receptor binding characteristics [Ki delta = 0.022 nM; Ki mu/Ki delta = 150,000] and delta antagonism (pA2 = 8.2; Ke = 5.7 nM). A change in chirality of Dmt at C alpha (1, 2, 6, 8, 10, 13) curtailed delta receptor parameters, while replacement of its alpha-amino function by a methyl group (3) led to inactivity; Tyr-Tic analogues 4 and 11 weakly interacted with delta receptors. N-Alkylation of H-Dmt-Tic-OH and H-Dmt-Tic-Ala-OH with methyl groups produced potent delta-opioid ligands with high delta receptor binding capabilities and enhanced delta antagonism: (i) N-Me-Dmt-Tic-OH 5 had high delta opioid binding (Ki delta = 0.2 nM), elevated delta antagonism on mouse vas deferens (MVD) (pA2 = 8.5; Ke = 2.8 nM), and nondetectable mu activity with guinea pig ileum (GPI). (ii) N,N-Me2-Dmt-Tic-OH (12) was equally efficacious in delta receptor binding (Ki delta = 0.12 nM; Ki mu/Ki delta = 20000), but delta antagonism rose considerably (pA2 = 9.4; Ke = 0.28 nM) with weak mu antagonism (pA2 = 5.8; Ke = 1.58 microM; GPI/MVD = 1:5640). N-Me-(9) and N,N-Me2-Dmt-Tic-Ala-OH (15) also augmented delta opioid receptor binding, such that 15 demonstrated high affinity (Ki delta = 0.0755 nM) and selectivity (Ki mu/Ki delta = 20132) with exceptional antagonist activity on MVD (pA2 = 9.6; Ke = 0.22 nM) and weak antagonism on GPI (pA2 = 5.8; Ke = 1.58 microM; GPI/MVD = 1:7180). Although the amidated dimethylated dipeptide analogue 14 had high Ki delta (0.31 nM) and excellent antagonist activity (pA2 = 9.9; Ke = 0.12 nM), the increased activity toward mu receptors in the absence of a free acid function at the C-terminus revealed modest delta selectivity (Ki mu/Ki delta = 1655) and somewhat comparable bioactivity (GPI/MVD = 4500). Thus, the data demonstrate that N,N-(Me)2-Dmt-Tic-OH (12) and N,N-Me2-Dmt-Tic-Ala-OH (15) retained high delta receptor affinities and delta selectivities and acquired enhanced potency in pharmacological bioassays on MVD greater than that of other peptide or non-peptide delta antagonists.
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MESH Headings
- Animals
- Binding, Competitive
- Cell Membrane/metabolism
- Dipeptides/chemical synthesis
- Dipeptides/chemistry
- Dipeptides/pharmacology
- Enkephalin, Ala(2)-MePhe(4)-Gly(5)-
- Enkephalin, D-Penicillamine (2,5)-
- Enkephalins/metabolism
- Guinea Pigs
- Ileum/drug effects
- Ileum/physiology
- In Vitro Techniques
- Indicators and Reagents
- Isoquinolines/chemical synthesis
- Isoquinolines/chemistry
- Isoquinolines/pharmacology
- Kinetics
- Male
- Methylation
- Mice
- Muscle Contraction/drug effects
- Muscle, Smooth/drug effects
- Muscle, Smooth/physiology
- Narcotic Antagonists/chemical synthesis
- Narcotic Antagonists/chemistry
- Narcotic Antagonists/pharmacology
- Radioligand Assay
- Receptors, Opioid, delta/antagonists & inhibitors
- Receptors, Opioid, delta/drug effects
- Receptors, Opioid, delta/physiology
- Receptors, Opioid, mu/drug effects
- Receptors, Opioid, mu/physiology
- Stereoisomerism
- Structure-Activity Relationship
- Vas Deferens/drug effects
- Vas Deferens/physiology
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Affiliation(s)
- S Salvadori
- Department of Pharmaceutical Science, University of Ferrara, Italy
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Abstract
Calcaneocuboid joint pressures were evaluated with eight cadaver specimens. Real-time pressures were recorded using a TekScan 4200 sensor pad at lengths of 0, 5, and 10 mm in both unloaded and 350-newton loaded models. Recorded pressures exceeded 2.3 MPa in the loaded model at 10 mm lateral column lengthening. Although an acceptable procedure in the pediatric population, application of the Evans lateral column lengthening procedure for management of adult acquired flatfoot may generate excessive pressures leading to joint arthrosis. Lengthening by calcaneocuboid distraction arthrodesis may avoid this problem.
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Affiliation(s)
- P S Cooper
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington 06032, USA
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Shamburek RD, Zech LA, Cooper PS, Vandenbroek JM, Schwartz CC. Disappearance of two major phosphatidylcholines from plasma is predominantly via LCAT and hepatic lipase. Am J Physiol 1996; 271:E1073-82. [PMID: 8997228 DOI: 10.1152/ajpendo.1996.271.6.e1073] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Metabolism of 1-stearoyl-2-arachidonyl-phosphatidyl-choline (SAPC), a major phosphatidylcholine (PC) species in rat plasma, was compared with 1-palmitoyl-2-linoleoyl-PC (PLPC) metabolism. High-density lipoproteins containing SAPC and PLPC tracers labeled in the sn-2 fatty acid with 3H and 14C isotopes, respectively, were administered. The rats were depleted of endogenous bile acids and infused via the ileum with individual bile acids that ranged widely in hydrophobicity. The half-lives for SAPC and PLPC in plasma were 48 and 57 min, respectively. Most of the 3H activity that disappeared from plasma at 1 h was found in the liver in 1-palmitoyl-2-arachidonyl-PC, SAPC, and 1-oleoyl-2-arachidonyl-PC, indicating phospholipase A1 hydrolysis of plasma SAPC forming 2-arachidonyl-lysophosphatidylcholine, which was reacylated in the liver. Plasma PLPC also underwent phospholipase A1 hydrolysis, as reported previously. The fraction of 3H dose that accumulated in plasma cholesteryl arachidonate was two- to threefold higher than the fraction of 14C dose in cholesteryl linoleate. Multicompartmental models for SAPC and PLPC were developed that included lysophosphatidylcholines and cholesteryl esters. Bile acids did not influence plasma PC metabolism. Lecithin-cholesterol acyltransferase and phospholipase A1 (hepatic lipase) hydrolysis accounted for > or = 90% of the SAPC and PLPC that disappeared from plasma; SAPC and PLPC are comparable as substrates for hepatic lipase, but SAPC is preferred by lecithin-cholesterol acyltransferase.
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Affiliation(s)
- R D Shamburek
- Department of Medicine, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298, USA
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Cooper PS, Murray TF. Arthroscopy of the foot and ankle in the athlete. Clin Sports Med 1996; 15:805-24. [PMID: 8891410] [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: 02/02/2023]
Abstract
Ankle arthroscopy has evolved over the past decade to address many acute and chronic injuries in the athlete. Although similar outcomes are reported with established open procedures, arthroscopic intervention confers the advantages of decreased postoperative morbidity and earlier return to sports activity. Arthroscopic procedures for the foot are evolving; however, most are considered investigational at this time.
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Affiliation(s)
- P S Cooper
- Division of Foot and Ankle Services, University of Connecticut Health Cenhter, Farmington, USA
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Abstract
Triple arthrodesis is the surgical fusion of the calcaneocuboid, talonavicular, and talocalcaneal joints of the foot. This is a palliative surgical procedure used to treat many painful hindfoot disorders (eg, clubfoot deformity, arthritis, Charcot's joint disease). Patient benefits include pain relief and improvement in foot function. Several anesthesia options are available for intraoperative and postoperative pain management. Perioperative nurses should be knowledgeable about foot anatomy, the sequence of surgical events, and possible postoperative complications from triple arthrodesis. A systems approach to patient care throughout the perioperative phase can ensure optimal patient outcomes.
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Affiliation(s)
- C A Schramm
- John Dempsey Hospital, University of Connecticut Health Center, Farmington, USA
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30
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Morelos A, Albuquerque IF, Bondar NF, Carrigan R, Chen D, Cooper PS, Lisheng D, Denisov AS, Dobrovolsky AV, Dubbs T, Endler AM, Escobar CO, Foucher M, Golovtsov VL, Gottschalk H, Gouffon P, Grachev VT, Khanzadeev AV, Kubantsev MA, Kuropatkin NP, Lach J, Lang P, Lebedenko VN, Li C, Li Y, Luksys M, Mahon JR, McCliment E, Newsom C, Samsonov VM, Schegelsky VA, Shi H, Smith VJ, Fukun T, Terentyev NK, Timm S, Tkatch II, Uvarov LN, Vorobyov AA, Yan J, Wenheng Z, Zheng S, Zhong Y. pt and xF dependence of the polarization of Sigma + hyperons produced by 800 GeV/c protons. Int J Clin Exp Med 1995; 52:3777-3780. [PMID: 10019602 DOI: 10.1103/physrevd.52.3777] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Timm S, Albuquerque IF, Bondar NF, Carrigan R, Chen D, Cooper PS, Lisheng D, Denisov AS, Dobrovolsky AV, Dubbs T, Endler AM, Escobar CO, Foucher M, Golovtsov VL, Gottschalk H, Gouffon P, Grachev VT, Khanzadeev AV, Kubantsev MA, Kuropatkin NP, Lach J, Lang P, Langland J, Li C, Li Y, Luksys M, Mahon JR, McCliment E, Morelos A, Newsom C, Samsonov VM, Schegelsky VA, Shi H, Smith VJ, Tang F, Terentyev NK, Tkatch II, Uvarov LN, Vorobyov AA, Yan J, Wenheng Z, Zheng S, Zhong Y. Measurement of the branching ratio and asymmetry parameter for the Sigma +-->p gamma radiative decay. Int J Clin Exp Med 1995; 51:4638-4660. [PMID: 10018944 DOI: 10.1103/physrevd.51.4638] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Albuquerque IF, Bondar NF, Carrigan R, Chen D, Cooper PS, Dai L, Denisov AS, Dobrovolsky AV, Dubbs T, Endler AM, Escobar CO, Foucher M, Golovtsov VL, Gottschalk H, Gouffon P, Grachev VT, Khanzadeev AV, Kubantsev MA, Kuropatkin NP, Lach J, Lang P, Li C, Li Y, Luksys M, Mahon JR, McCliment E, Morelos A, Newsom C, Maia MC, Samsonov VM, Schegelsky VA, Shi H, Smith VJ, Tang F, Terentyev NK, Timm S, Tkatch II, Uvarov LN, Vorobyov AA, Yan J, Zhao W, Zheng S, Zhong Y. New upper limit for the branching ratio of the Omega ---> Xi - gamma radiative decay. Int J Clin Exp Med 1994; 50:R18-R20. [PMID: 10017570 DOI: 10.1103/physrevd.50.r18] [Citation(s) in RCA: 4] [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: 11/07/2022]
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34
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Dubbs T, Albuquerque IF, Bondar NF, Carrigan R, Chen D, Cooper PS, Lisheng D, Denisov AS, Dobrovolsky AV, Endler AM, Escobar CO, Foucher M, Golovtsov VL, Gottschalk H, Gouffon P, Grachev VT, Khanzadeev AV, Kubantsev MA, Kuropatkin NP, Lach J, Pengfei L, Chengze L, Yunshan L, Luksys M, Mahon JR, McCliment E, Morelos A, Newsom C, Samsonov VM, Schegelsky VA, Huanzhang S, Smith VJ, Fukun T, Terentyev NK, Timm S, Tkatch II, Uvarov LN, Vorobyov AA, Jie Y, Wenheng Z, Shuchen Z, Yuanyuan Z. Measurement of the branching ratio for the Xi ---> Sigma - gamma radiative decay. Phys Rev Lett 1994; 72:808-811. [PMID: 10056540 DOI: 10.1103/physrevlett.72.808] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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35
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Morelos A, Albuquerque IF, Bondar NF, Carrigan RA, Chen D, Cooper PS, Lisheng D, Denisov AS, Dobrovolsky AV, Dubbs T, Endler AM, Escobar CO, Foucher M, Golovtsov VL, Gottschalk H, Gouffon P, Grachev VT, Khanzadeev AV, Kubantsev MA, Kuropatkin NP, Lach J, Lang P, Li C, Li Y, Luksys M, Mahon JR, McCliment E, Newsom C, Samsonov VM, Schegelsky VA, Shi H, Smith VJ, Tang F, Terentyev NK, Timm S, Tkatch II, Uvarov LN, Vorobyov AA, Yan J, Zhao W, Shuchen Z, Zhong Y. Measurement of the magnetic moments of the Sigma + and Sigma -bar- hyperons. Phys Rev Lett 1993; 71:3417-3420. [PMID: 10054972 DOI: 10.1103/physrevlett.71.3417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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36
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Morelos A, Albuquerque IF, Bondar NF, Carrigan RA, Chen D, Cooper PS, Dai L, Denisov AS, Dobrovolsky AV, Dubbs T, Endler AM, Escobar CO, Foucher M, Golovtsov VL, Gottschalk H, Gouffon P, Grachev VT, Khanzadeev AV, Kubantsev MA, Kuropatkin NP, Lach J, Lang P, Li C, Li Y, Luksys M, Mahon JR, McCliment E, Newsom C, Samsonov VM, Schegelsky VA, Shi H, Smith VJ, Tang F, Terentyev NK, Timm S, Tkatch II, Uvarov LN, Vorobyov AA, Yan J, Zhao W, Zheng S, Zhong Y. Polarization of Sigma + and Sigma -bar- hyperons produced by 800-GeV/c protons. Phys Rev Lett 1993; 71:2172-2175. [PMID: 10054606 DOI: 10.1103/physrevlett.71.2172] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Schwartz CC, Zech LA, VandenBroek JM, Cooper PS. Cholesterol kinetics in subjects with bile fistula. Positive relationship between size of the bile acid precursor pool and bile acid synthetic rate. J Clin Invest 1993; 91:923-38. [PMID: 8450070 PMCID: PMC288045 DOI: 10.1172/jci116314] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Our aim was to identify and quantitate cholesterol pools and transport pathways in blood and liver. By studying bile fistula subjects, using several types of isotopic preparations, simultaneous labeling of separate cholesterol pools and sampling all components of blood and bile at frequent intervals, we developed a comprehensive multicompartmental model for cholesterol within the rapidly miscible pool. Data in six components (bile acids, esterified cholesterol in whole plasma, and free cholesterol in blood cells, bile, alpha lipoproteins, and beta lipoproteins) were modeled simultaneously with the SAAM program. The analysis revealed extensive exchange of free cholesterol between HDL and liver, blood cells, and other tissues. There was net free cholesterol transport from HDL to the liver in most subjects. The major organ that removed esterified cholesterol from blood was the liver. A large portion (4,211 mumol) of total hepatic cholesterol comprised a pool that turned over rapidly (t1/2 of 72 min) by exchanging mainly with plasma HDL and was the major source of bile acids and biliary cholesterol. Only 6% of hepatic newly synthesized cholesterol was used directly for bile acid synthesis: the analysis showed that 94% of newly synthesized cholesterol was partitioned into the large hepatic pool (putative plasma membrane free cholesterol) which exchanged rapidly with plasma lipoproteins. Bile acid synthetic rate correlated directly with the size of the large hepatic pool. In conclusion, hepatic and blood cholesterol pools and transports have been quantitated. HDL plays a central role in free cholesterol exchange/transport between all tissues and plasma. In humans, the metabolically active pool comprises a large portion of total hepatic cholesterol that, in part, regulates bile acid synthesis.
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Affiliation(s)
- C C Schwartz
- Department of Medicine, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298
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38
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Chen D, Albuquerque IF, Baublis VV, Bondar NF, Carrigan RA, Cooper PS, Lisheng D, Denisov AS, Dobrovolsky AV, Dubbs T, Endler AM, Escobar CO, Foucher M, Golovtsov VL, Goritchev PA, Gottschalk H, Gouffon P, Grachev VT, Khanzadeev AV, Kubantsev MA, Kuropatkin NP, Lach J, Lebedenko VN, Mahon JR, McCliment E, Morelos A, Newsom C, Samsonov VM, Schegelsky VA, Smith VJ, Sun CR, Terentyev NK, Timm S, Tkatch II, Uvarov LN, Vorobyov AA. First observation of magnetic moment precession of channeled particles in bent crystals. Phys Rev Lett 1992; 69:3286-3289. [PMID: 10046780 DOI: 10.1103/physrevlett.69.3286] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Foucher M, Albuquerque IF, Bondar NF, Carrigan R, Chen D, Cooper PS, Denisov AS, Dobrovolsky AV, Dubbs T, Endler AM, Escobar CO, Golovtsov VL, Goritchev PA, Gottschalk H, Gouffon P, Grachev VT, Khanzadeev AV, Kubantsev MA, Kuropatkin NP, Lach J, Luksys M, Lebedenko VN, Mahon JR, McCliment E, Morelos A, Newsom C, Samsonov VM, Smith VJ, Terentyev NK, Timm S, Tkatch II, Uvarov LN, Vorobyov AA. Measurement of the asymmetry parameter in the hyperon radiative decay Sigma +-->p gamma. Phys Rev Lett 1992; 68:3004-3007. [PMID: 10045583 DOI: 10.1103/physrevlett.68.3004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Alliegro C, Campagnari C, Chaloupka V, Cooper PS, Egger J, Gordon HA, Hadley NJ, Herold WD, Kaspar H, Lee AM, Lazarus DM, Lubatti HJ, Rehak P, Zeller ME, Zhao T. Study of the decay K+--> pi +e+e-. Phys Rev Lett 1992; 68:278-281. [PMID: 10045851 DOI: 10.1103/physrevlett.68.278] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Scagnelli GP, Cooper PS, VandenBroek JM, Berman WF, Schwartz CC. Plasma 1-palmitoyl-2-linoleoyl phosphatidylcholine. Evidence for extensive phospholipase A1 hydrolysis and hepatic metabolism of the products. J Biol Chem 1991; 266:18002-11. [PMID: 1917938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
1-Palmitoyl-2-linoleoyl phosphatidylcholine (PLPC) labeled in either the choline, glycerol, palmitate, or linoleate component in reconstituted rat high density lipoprotein (rHDL), was administered by vein to rats with bile fistula and taurocholate infusion. PLPC disappeared from plasma in a monoexponential fashion with a half-life of 50 min. A small fraction, about 14%, of PLPC disappearance was due to removal of linoleate from the sn-2 ester bond to form plasma cholesterol esters, presumably by lecithin-cholesterol acyltransferase. Otherwise, nearly all of the PLPC components that disappeared from blood in 1 h were recovered in the liver. The choline, glycerol, and linoleate components appeared predominantly in hepatic phosphatidylcholine (PC). These three components remained together in the liver with similar fractions of each in individual PC molecular species, most notably 1-stearoyl-2-linoleoyl-PC and dilinoleoyl-PC as well as PLPC. However, the palmitate component was spread among hepatic triglyceride, free fatty acid, other phospholipids, and all palmitate-containing molecular species of PC. Less than 2% of any administered PLPC component appeared in 1-stearoyl-2-arachidonyl-PC, the major species by mass in the liver. The palmitate component from plasma PLPC appeared in biliary PC at a more rapid rate than glycerol and linoleate components; the latter components appeared in bile in identical fashion. The results show that about two-thirds of plasma PLPC disappearance is due to phospholipase A1 hydrolysis, probably hepatic lipase. The putative produce, 2-linoleoyl-lysoPC, is efficiently reacylated with a saturated fatty acid in the liver, conserving PC.
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Affiliation(s)
- G P Scagnelli
- Department of Medicine, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298
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Lee AM, Alliegro C, Campagnari C, Chaloupka V, Cooper PS, Egger J, Gordon HA, Hadley NJ, Herold WD, Jagel EA, Kaspar H, Lazarus DM, Lubatti HJ, Rehak P, Zeller ME, Zhao T. Improved limit on the branching ratio of K+--> pi + micro+e-. Phys Rev Lett 1990; 64:165-168. [PMID: 10041666 DOI: 10.1103/physrevlett.64.165] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Trost LH, McCliment ER, Newsom CR, Hsueh SY, Müller D, Tang J, Winston R, Zapalac G, Swallow EC, Berge JP, Brenner AE, Cooper PS, Grafström P, Jastrzembski E, Lach J, Marriner J, Raja R, Smith VJ, Anderson EW, Denisov AS, Grachev VT, Schegelsky VA, Seliverstov DM, Smirnov NN, Terentyev NK, Tkatch II, Vorobyov AA, Razis P, Teig LJ. New measurement of the production polarization and magnetic moment of the Xi - hyperon. Int J Clin Exp Med 1989; 40:1703-1707. [PMID: 10011997 DOI: 10.1103/physrevd.40.1703] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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44
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Campagnari C, Alliegro C, Chaloupka V, Cooper PS, Egger J, Gordon HA, Hadley NJ, Herold WD, Jagel EA, Kaspar H, Lazarus DM, Lee AM, Lubatti HJ, Rehak P, Zeller ME. Search for the decay K+--> pi + micro+e-. Phys Rev Lett 1988; 61:2062-2065. [PMID: 10038973 DOI: 10.1103/physrevlett.61.2062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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45
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Hsueh SY, Müller D, Tang J, Winston R, Zapalac G, Swallow EC, Berge JP, Brenner AE, Cooper PS, Grafström P, Jastrzembski E, Lach J, Marriner J, Raja R, Smith VJ, McCliment E, Newsom C, Anderson EW, Denisov AS, Grachev VT, Schegelsky VA, Seliverstov DM, Smirnov NN, Terentyev NK, Tkatch II, Vorobyov AA, Razis P, Teig LJ. High-precision measurement of polarized- Sigma - beta decay. Phys Rev D Part Fields 1988; 38:2056-2076. [PMID: 9959360 DOI: 10.1103/physrevd.38.2056] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Baker NJ, Gordon HA, Lazarus DM, Polychronakos VA, Rehak P, Tannenbaum MJ, Egger J, Herold WD, Kaspar H, Chaloupka V, Jagel EA, Lubatti HJ, Alliegro C, Campagnari C, Cooper PS, Hadley NJ, Lee AM, Zeller ME. Search for short-lived neutral particles emitted in K+ decay. Phys Rev Lett 1987; 59:2832-2835. [PMID: 10035665 DOI: 10.1103/physrevlett.59.2832] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Zapalac G, Hsueh SY, Muller D, Tang J, Winston R, Swallow EC, Berge JP, Brenner AE, Grafström P, Jastrzembski E, Lach J, Marriner J, Raja R, Smith VJ, McCliment E, Newsom C, Anderson EW, Denisov AS, Grachev VT, Schegelsky VA, Seliverstov DM, Smirnov NN, Terentyev NK, Tkatch II, Vorobyov AA, Cooper PS, Razis P, Teig LJ. Measurement of the Sigma - magnetic moment using the Sigma --->ne- nu -bar and Sigma --->n pi - decay modes. Phys Rev Lett 1986; 57:1526-1529. [PMID: 10033476 DOI: 10.1103/physrevlett.57.1526] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Wah YW, Cardello TR, Cooper PS, Teig LJ, Thron JL, Ankenbrandt C, Berge JP, Brenner AE, Butler J, Doroba K, Lach J, Laurikainen P, Marriner J, McCliment E, Anderson EW, Breakstone A. Measurement of Sigma - production polarization and magnetic moment. Phys Rev Lett 1985; 55:2551-2554. [PMID: 10032176 DOI: 10.1103/physrevlett.55.2551] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Tzeng L, McBride PL, Cooper PS, Li Y, Majka RD, Sandweiss J, Slaughter AJ, Taft HD, Teig LJ, Johnson ME, Nemethy P. Charm production in neutron-nucleon interactions. Phys Rev Lett 1985; 55:1172-1175. [PMID: 10031747 DOI: 10.1103/physrevlett.55.1172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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