1
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Boutan C, Jones M, LaRoque BH, Oblath NS, Cervantes R, Du N, Force N, Kimes S, Ottens R, Rosenberg LJ, Rybka G, Yang J, Carosi G, Woollett N, Bowring D, Chou AS, Khatiwada R, Sonnenschein A, Wester W, Bradley R, Daw EJ, Agrawal A, Dixit AV, Clarke J, O'Kelley SR, Crisosto N, Gleason JR, Jois S, Sikivie P, Stern I, Sullivan NS, Tanner DB, Harrington PM, Lentz E. Piezoelectrically Tuned Multimode Cavity Search for Axion Dark Matter. Phys Rev Lett 2018; 121:261302. [PMID: 30636160 DOI: 10.1103/physrevlett.121.261302] [Citation(s) in RCA: 5] [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: 08/22/2018] [Indexed: 06/09/2023]
Abstract
The μeV axion is a well-motivated extension to the standard model. The Axion Dark Matter eXperiment (ADMX) collaboration seeks to discover this particle by looking for the resonant conversion of dark-matter axions to microwave photons in a strong magnetic field. In this Letter, we report results from a pathfinder experiment, the ADMX "Sidecar," which is designed to pave the way for future, higher mass, searches. This testbed experiment lives inside of and operates in tandem with the main ADMX experiment. The Sidecar experiment excludes masses in three widely spaced frequency ranges (4202-4249, 5086-5799, and 7173-7203 MHz). In addition, Sidecar demonstrates the successful use of a piezoelectric actuator for cavity tuning. Finally, this publication is the first to report data measured using both the TM_{010} and TM_{020} modes.
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Affiliation(s)
- C Boutan
- Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - M Jones
- Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - B H LaRoque
- Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - N S Oblath
- Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - R Cervantes
- University of Washington, Seattle, Washington 98195, USA
| | - N Du
- University of Washington, Seattle, Washington 98195, USA
| | - N Force
- University of Washington, Seattle, Washington 98195, USA
| | - S Kimes
- University of Washington, Seattle, Washington 98195, USA
| | - R Ottens
- University of Washington, Seattle, Washington 98195, USA
| | - L J Rosenberg
- University of Washington, Seattle, Washington 98195, USA
| | - G Rybka
- University of Washington, Seattle, Washington 98195, USA
| | - J Yang
- University of Washington, Seattle, Washington 98195, USA
| | - G Carosi
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N Woollett
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Bowring
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - A S Chou
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - R Khatiwada
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - A Sonnenschein
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - W Wester
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - R Bradley
- National Radio Astronomy Observatory, Charlottesville, Virginia 22903, USA
| | - E J Daw
- University of Sheffield, Sheffield S3 7RH, United Kingdom
| | - A Agrawal
- University of Chicago, Illinois 60637, USA
| | - A V Dixit
- University of Chicago, Illinois 60637, USA
| | - J Clarke
- University of California, Berkeley, California 94720, USA
| | - S R O'Kelley
- University of California, Berkeley, California 94720, USA
| | - N Crisosto
- University of Florida, Gainesville, Florida 32611, USA
| | - J R Gleason
- University of Florida, Gainesville, Florida 32611, USA
| | - S Jois
- University of Florida, Gainesville, Florida 32611, USA
| | - P Sikivie
- University of Florida, Gainesville, Florida 32611, USA
| | - I Stern
- University of Florida, Gainesville, Florida 32611, USA
| | - N S Sullivan
- University of Florida, Gainesville, Florida 32611, USA
| | - D B Tanner
- University of Florida, Gainesville, Florida 32611, USA
| | | | - E Lentz
- University of Göttingen, Göttingen 37077, Germany
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2
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Du N, Force N, Khatiwada R, Lentz E, Ottens R, Rosenberg LJ, Rybka G, Carosi G, Woollett N, Bowring D, Chou AS, Sonnenschein A, Wester W, Boutan C, Oblath NS, Bradley R, Daw EJ, Dixit AV, Clarke J, O'Kelley SR, Crisosto N, Gleason JR, Jois S, Sikivie P, Stern I, Sullivan NS, Tanner DB, Hilton GC. Search for Invisible Axion Dark Matter with the Axion Dark Matter Experiment. Phys Rev Lett 2018; 120:151301. [PMID: 29756850 DOI: 10.1103/physrevlett.120.151301] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Indexed: 05/27/2023]
Abstract
This Letter reports the results from a haloscope search for dark matter axions with masses between 2.66 and 2.81 μeV. The search excludes the range of axion-photon couplings predicted by plausible models of the invisible axion. This unprecedented sensitivity is achieved by operating a large-volume haloscope at subkelvin temperatures, thereby reducing thermal noise as well as the excess noise from the ultralow-noise superconducting quantum interference device amplifier used for the signal power readout. Ongoing searches will provide nearly definitive tests of the invisible axion model over a wide range of axion masses.
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Affiliation(s)
- N Du
- University of Washington, Seattle, Washington 98195, USA
| | - N Force
- University of Washington, Seattle, Washington 98195, USA
| | - R Khatiwada
- University of Washington, Seattle, Washington 98195, USA
| | - E Lentz
- University of Washington, Seattle, Washington 98195, USA
| | - R Ottens
- University of Washington, Seattle, Washington 98195, USA
| | - L J Rosenberg
- University of Washington, Seattle, Washington 98195, USA
| | - G Rybka
- University of Washington, Seattle, Washington 98195, USA
| | - G Carosi
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N Woollett
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Bowring
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - A S Chou
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - A Sonnenschein
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - W Wester
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - C Boutan
- Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - N S Oblath
- Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - R Bradley
- National Radio Astronomy Observatory, Charlottesville, Virginia 22903, USA
| | - E J Daw
- University of Sheffield, Sheffield S3 7RH, United Kingdom
| | - A V Dixit
- University of Chicago, Illinois 60637, USA
| | - J Clarke
- University of California, Berkeley, California 94720, USA
| | - S R O'Kelley
- University of California, Berkeley, California 94720, USA
| | - N Crisosto
- University of Florida, Gainesville, Florida 32611, USA
| | - J R Gleason
- University of Florida, Gainesville, Florida 32611, USA
| | - S Jois
- University of Florida, Gainesville, Florida 32611, USA
| | - P Sikivie
- University of Florida, Gainesville, Florida 32611, USA
| | - I Stern
- University of Florida, Gainesville, Florida 32611, USA
| | - N S Sullivan
- University of Florida, Gainesville, Florida 32611, USA
| | - D B Tanner
- University of Florida, Gainesville, Florida 32611, USA
| | - G C Hilton
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
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3
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Collett B, Bateman F, Bauder WK, Byrne J, Byron WA, Chen W, Darius G, DeAngelis C, Dewey MS, Gentile TR, Hassan MT, Jones GL, Komives A, Laptev A, Mendenhall MP, Nico JS, Noid G, Park H, Stephenson EJ, Stern I, Stockton KJS, Trull C, Wietfeldt FE, Yerozolimsky BG. aCORN: An experiment to measure the electron-antineutrino correlation coefficient in free neutron decay. Rev Sci Instrum 2017; 88:083503. [PMID: 28863637 PMCID: PMC6078102 DOI: 10.1063/1.4996542] [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] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We describe an apparatus used to measure the electron-antineutrino angular correlation coefficient in free neutron decay. The apparatus employs a novel measurement technique in which the angular correlation is converted into a proton time-of-flight asymmetry that is counted directly, avoiding the need for proton spectroscopy. Details of the method, apparatus, detectors, data acquisition, and data reduction scheme are presented, along with a discussion of the important systematic effects.
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Affiliation(s)
- B. Collett
- Physics Department, Hamilton College, Clinton, NY 13323, USA
| | - F. Bateman
- National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA
| | - W. K. Bauder
- Physics Department, Hamilton College, Clinton, NY 13323, USA
| | - J. Byrne
- University of Sussex, Brighton, Sussex, BA1 9QH, UK
| | - W. A. Byron
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
| | - W. Chen
- National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA
- University of Maryland, College Park, Maryland 20742, USA
| | - G. Darius
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
| | - C. DeAngelis
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
| | - M. S. Dewey
- National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA
| | - T. R. Gentile
- National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA
| | - M. T. Hassan
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
| | - G. L. Jones
- Physics Department, Hamilton College, Clinton, NY 13323, USA
| | - A. Komives
- Department of Physics and Astronomy, DePauw University, Greencastle, IN 46135, USA
| | - A. Laptev
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
| | - M. P. Mendenhall
- National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA
| | - J. S. Nico
- National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA
| | - G. Noid
- CEEM, Indiana University, Bloomington, IN 47408, USA
| | - H. Park
- National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA
| | | | - I. Stern
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
| | | | - C. Trull
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
| | - F. E. Wietfeldt
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
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Hassan MT, Bateman F, Collett B, Darius G, DeAngelis C, Dewey MS, Jones GL, Komives A, Laptev A, Mendenhall MP, Nico JS, Noid G, Stephenson EJ, Stern I, Trull C, Wietfeldt FE. The aCORN Backscatter-Suppressed Beta Spectrometer. Nucl Instrum Methods Phys Res A 2017; 867:10.1016/j.nima.2017.05.029. [PMID: 31092963 PMCID: PMC6512858 DOI: 10.1016/j.nima.2017.05.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Backscatter of electrons from a beta spectrometer, with incomplete energy deposition, can lead to undesirable effects in many types of experiments. We present and discuss the design and operation of a backscatter-suppressed beta spectrometer that was developed as part of a program to measure the electronantineutrino correlation coefficient in neutron beta decay (aCORN). An array of backscatter veto detectors surrounds a plastic scintillator beta energy detector. The spectrometer contains an axial magnetic field gradient, so electrons are efficiently admitted but have a low probability for escaping back through the entrance after backscattering. The design, construction, calibration, and performance of the spectrometer are discussed.
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Affiliation(s)
- M T Hassan
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
| | - F Bateman
- National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - B Collett
- Physics Department, Hamilton College, Clinton, NY 13323, USA
| | - G Darius
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
| | - C DeAngelis
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
| | - M S Dewey
- National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - G L Jones
- Physics Department, Hamilton College, Clinton, NY 13323, USA
| | - A Komives
- Department of Physics and Astronomy, DePauw University, Greencastle, IN 46135, USA
| | - A Laptev
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
| | - M P Mendenhall
- National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - J S Nico
- National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - G Noid
- CEEM, Indiana University, Bloomington, IN 47408, USA
| | | | - I Stern
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
| | - C Trull
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
| | - F E Wietfeldt
- Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA
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5
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Stern I, Chisholm AA, Hoskins J, Sikivie P, Sullivan NS, Tanner DB, Carosi G, van Bibber K. Cavity design for high-frequency axion dark matter detectors. Rev Sci Instrum 2015; 86:123305. [PMID: 26724020 DOI: 10.1063/1.4938164] [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: 10/07/2015] [Accepted: 12/06/2015] [Indexed: 06/05/2023]
Abstract
In an effort to extend the usefulness of microwave cavity detectors to higher axion masses, above ∼8 μeV (∼2 GHz), a numerical trade study of cavities was conducted to investigate the merit of using variable periodic post arrays and regulating vane designs for higher-frequency searches. The results show that both designs could be used to develop resonant cavities for high-mass axion searches. Multiple configurations of both methods obtained the scanning sensitivity equivalent to approximately 4 coherently coupled cavities with a single tuning rod.
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Affiliation(s)
- I Stern
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - A A Chisholm
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - J Hoskins
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - P Sikivie
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - N S Sullivan
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - D B Tanner
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - G Carosi
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - K van Bibber
- Department of Nuclear Engineering, University of California, Berkeley, California 94720, USA
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Thoppay J, DeRossi S, Stern I, Hsu S. Oxidative Stress Markers At Symptom Free Stages of Autoimmune Diseases. Oral Surg Oral Med Oral Pathol Oral Radiol 2013. [DOI: 10.1016/j.oooo.2013.05.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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De Rossi S, Dickinson D, Ogbureke K, Thoppay J, Stern I, Ma Y, Hsu S. Inverse Relationship of PCNA and p21 Expression in Xerostomia. Oral Surg Oral Med Oral Pathol Oral Radiol 2012. [DOI: 10.1016/j.oooo.2012.05.031] [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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8
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Stern I, Wataha JC, Lewis JB, Messer RLW, Lockwood PE, Tseng WY. Anti-rheumatic gold compounds as sublethal modulators of monocytic LPS-induced cytokine secretion. Toxicol In Vitro 2005; 19:365-71. [PMID: 15713543 DOI: 10.1016/j.tiv.2004.11.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2004] [Revised: 11/05/2004] [Accepted: 11/09/2004] [Indexed: 10/25/2022]
Abstract
The objective of this study was to quantify the ability of sublethal concentrations of several gold compounds to differentially modulate the monocytic secretion of key cytokines that are important in the etiology of rheumatic diseases. Human THP1 monocytic cells were exposed to the anti-rheumatic drugs auranofin (AF), gold sodium thiomalate (GSTM) or HAuCl4 (Au(III)) for 24-72 h. Succinate dehydrogenase (SDH) activity of the monocytes was used to determine sublethal concentrations. Monocytes were then exposed to sublethal concentrations of gold compounds for 72 h, and the activator lipopolysaccharide (LPS) was added (or not) to cultures for the last 6h. The secretion of IL6, IL8, IL10, and TNFalpha were measured in cell supernatants using ELISA. Cytokine secretion was compared among concentrations and gold compounds. SDH experiments established a sublethal concentration range of 0-75 microM for GSTM and Au(III) and 0-0.5 microM for AF. In cytokine experiments, none of the compounds alone activated secretion of any of the cytokines, but all differentially (50-440%, p<0.05) increased LPS-induced secretion of IL6 and IL8 over TNFalpha and IL10. In conclusion, sublethal concentrations of AF, GSTM, and Au(III) all may differentially modulate activation of monocytic cells, and this differential modulation may be important in the mechanisms of action of these compounds.
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Affiliation(s)
- I Stern
- Medical College of Georgia, Augusta, Georgia, USA
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9
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Aréchiga H, Ramón de-la Fuente J, Cravioto A, Peregrina-Pellón L, Córdova-Villalobos JA, Graue-Wiechers E, Stern I, López-Bárcena J, de-la Garza J, Gago-Huguet A, Uribe-Elías R, Campillo-Serrano C, Rivero-Serrano C. [Continuing medical education]. GAC MED MEX 1996; 132 Suppl 2:141-77. [PMID: 9081857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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10
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Odes HS, Lazovski H, Stern I, Madar Z. Double-blind trial of a high dietary fiber, mixed grain cereal in patients with chronic constipation and hyperlipidemia. Nutr Res 1993. [DOI: 10.1016/s0271-5317(05)80517-2] [Citation(s) in RCA: 15] [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: 11/25/2022]
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Odes HS, Lazovski H, Stern I, Madar Z. [Fiber-enriched cereal for constipation and for hypercholesterolemia]. Harefuah 1993; 125:136-8, 192. [PMID: 8225090] [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: 01/29/2023]
Abstract
A mixed-grain, high-fiber cereal (Disivit) prepared from oats, corn, wheat and soybean was used to treat 20 patients with chronic constipation and 22 with hypercholesterolemia in double-blind, cross-over trials. Disivit (50 g/d, containing 12.5 g dietary fiber) was given to the constipated patients for 2 weeks and then a low-fiber placebo for another 2 weeks, and similarly for the hypercholesterolemic patients. In those with constipation, the frequency of bowel movements increased significantly, stools became softer and laxative intake decreased. In hypercholesterolemic patients serum cholesterol decreased significantly, but only by 15%. Thus the fiber cereal appears to be a suitable treatment for constipation, while for hypercholesterolemia a larger dose or a longer period of treatment may be required.
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Affiliation(s)
- H S Odes
- Gastroenterology Dept., Soroka Medical Center, Beer Sheba
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12
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Allander SV, Bajalica S, Larsson C, Luthman H, Powell DR, Stern I, Weber G, Zazzi H, Ehrenborg E. Structure and chromosomal localization of human insulin-like growth factor-binding protein genes. Growth Regul 1993; 3:3-5. [PMID: 7683522] [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: 01/26/2023]
Abstract
The insulin-like growth factor binding proteins (IGFBPs) constitute a structurally related protein family with six known members. We have mapped and regionally localized the genes coding for human IGFBP1, 2, 3, and 4, by in situ hybridization and somatic cell hybrid analysis. The IGFBP2 gene maps to chromosomal region 2q33-q34 whereas the genes for IGFBP1 and 3 are localized in a tail-to-tail fashion on chromosome 7 region p14-p12. The IGFBP4 gene is located in the chromosomal region 17q12-21.1. Structural characterization of the genes coding for IGFBP-1, 2, 3, and 5 showed that the translated parts are divided into four exons. The exons are similar both in size and sequence in all studied genes.
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Affiliation(s)
- S V Allander
- Department of Clinical Genetics, Karolinska Institute, Stockholm, Sweden
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13
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Lindgren BF, Isaksson M, Stern I, Hall K. Insulin-like growth factor binding protein-1 from Hep G2 cells is potently inhibited by the truncated IGF-I analogue des-(1-3) IGF-I. Acta Endocrinol (Copenh) 1993; 128:81-7. [PMID: 7680515 DOI: 10.1530/acta.0.1280081] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Des-(1-3) insulin-like growth factor-I (IGF-I) is an IGF analogue lacking aminoacid 1 to 3 which displays reduced binding to insulin-like growth factor binding protein-1 (IGFBP-1). A greater inhibition of immunoreactive IGFBP-1 was obtained with des-(1-3) IGF-I (10 ng/ml) in Hep G2 medium when incubated in Eagle's Modified Essential Medium (EMEM) without phenolred compared to EMEM with phenolred; EMEM without phenolred was chosen for further experiments. Des-(1-3)IGF-I decreases dose dependently the concentration of IGFBP-1, with a maximal effect at 3-10 micrograms/l when incubated for 24 h; 10 micrograms/l of des-(1-3)IGF-I caused a small but significant inhibition of IGFBP-1 after 8 h incubation and this inhibition was 41% and 33% of controls after 14 and 19 h incubation. The relative potencies at 16 h of incubation of IGF-I and insulin in suppressing IGFBP-1 in comparison to des-(1-3)IGF-I were 0.41 (0.25-0.78) and 0.08 (0.01-0.26), respectively. A dose-dependent decrease of IGFBP-1 mRNA to 30% of control was observed after 4 h incubation with 0.1-10 micrograms/l des-(1-3)IGF-I. Changes of glucose concentration (0-20 mmol/l) in the medium did not affect the IGFBP-1 concentration in the medium. In summary: Des-(1-3)IGF-I was tenfold more potent than insulin, and threefold more potent than IGF-I in decreasing IGFBP-1 concentration in medium conditioned by Hep G2 cells.
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Affiliation(s)
- B F Lindgren
- Department of Endocrinology, Karolinska Hospital, Stockholm, Sweden
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14
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Glaser A, Luthman H, Stern I, Ohlsson R. Spatial distribution of active genes implicated in the regulation of insulin-like growth factor stimulatory loops in human decidual and placental tissue of first-trimester pregnancy. Mol Reprod Dev 1992; 33:7-15. [PMID: 1380818 DOI: 10.1002/mrd.1080330103] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We have previously shown that the insulin-like growth factor-2 (IGF-2) gene is partially coexpressed with the IGF-1 and -2 receptor genes in proliferative cytotrophoblasts of the human extraembryonic tissue. Here we show that high levels of IGF-2 gene expression are not restricted to the embryonic tissue but can also be found in the decidua compacta. The IGF-2 gene is thus expressed at high levels in the mesenchymal stroma of the decidua to establish potentially short-range communication with primarily IGF-1 receptor-positive mesenchymal stroma cells. Conversely, the glandular and surface epithelia coexpress the IGF-1 receptor and IGF-1 genes, while the IGF-2 gene is not detected above background levels. The potential control mechanisms of these cell-cell signalling pathways were investigated by the analysis of the spatial distribution of active IGF binding proteins (IGFBP) genes. The IGFBP-3 gene is coexpressed with the IGF-2 gene in proliferative cytotrophoblasts of the embryonic placenta. While active IGFBP-1 and -2 genes in our hands cannot be detected in the embryonic placenta, all three IGFBP genes are expressed in complex and overlapping patterns in the decidua compacta. The results are discussed in terms of how the various IGFBP genes may operate in different cell types to restrict IGF local stimulatory pathways.
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Affiliation(s)
- A Glaser
- Laboratory for Molecular Development and Tumour Biology, Karolinska Hospital, Stockholm, Sweden
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15
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Ehrenborg E, Larsson C, Stern I, Janson M, Powell DR, Luthman H. Contiguous localization of the genes encoding human insulin-like growth factor binding proteins 1(IGBP1) and 3(IGBP3) on chromosome 7. Genomics 1992; 12:497-502. [PMID: 1373120 DOI: 10.1016/0888-7543(92)90440-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [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: 11/22/2022]
Abstract
In extracellular fluids the insulin-like growth factors (IGFs) are bound to specific binding proteins (IGBPs). The genes for two members of this protein family have been mapped, the IGBP1 gene to human chromosomal region 7p14-p12 and the IGBP2 gene to region 2q33-q34. In this study, somatic cell hybrid analysis indicated that IGBP3 is also located on chromosome 7. Pulsed-field gel electrophoresis was used to demonstrate the close physical linkage between IGBP1 and IGBP3. Overlapping cosmid clones encompassing these genes were isolated, and restriction endonuclease mapping showed that the genes are arranged in a tail-to-tail fashion separated by 20 kb of DNA. Further characterization of the IGBP1 DNA sequence disclosed a duplication of the intron 3-exon 4 junction within the third intron. In addition, we report RFLPs for ApaLI and TaqI in the IGBP1 locus.
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Affiliation(s)
- E Ehrenborg
- Department of Clinical Genetics, Karolinska Institute, Karolinska Hospital, Stockholm, Sweden
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Ehrenborg E, Vilhelmsdotter S, Bajalica S, Larsson C, Stern I, Koch J, Brøndum-Nielsen K, Luthman H. Structure and localization of the human insulin-like growth factor-binding protein 2 gene. Biochem Biophys Res Commun 1991; 176:1250-5. [PMID: 1710112 DOI: 10.1016/0006-291x(91)90420-c] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [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: 12/28/2022]
Abstract
Insulin-like growth factor binding proteins (IGFBPs) are extracellular proteins that specifically bind IGF and modulate their effects. The human IGFBP2 gene was studied and shown to be localized to chromosome 2 region q33-q34, by somatic cell hybrid analysis and in situ hybridization. Structural characterization of the gene showed that it consists of four exons with three introns of lengths 27.0, 1.0, and 1.9 kilobase-pairs. Comparison of the encoded protein sequence of each exon in IGFBP1, 2, and 3 reveals the highest amino acid identity, 28%, in exon 1, while the lowest was found in exon 2. However, pairwise sequence comparisons demonstrate 50% identity between the protein sequences encoded by exon 4 in IGFBP1 and 2, while their respective identities with IGFBP3 are only 25 and 30%.
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Affiliation(s)
- E Ehrenborg
- Department of Clinical Genetics, Karolinska Institute, Stockholm, Sweden
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Sten-Linder M, Vilhelmsdotter S, Wedell A, Stern I, Pollare T, Arner P, Efendić S, Luft R, Luthman H. Screening for insulin receptor gene DNA polymorphisms associated with glucose intolerance in a Scandinavian population. Diabetologia 1991; 34:265-70. [PMID: 1676686 DOI: 10.1007/bf00405086] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The significance of insulin receptor gene variants in the aetiology of Type 2 (non-insulin-dependent) diabetes mellitus has been investigated by analysis of restriction fragment length polymorphisms in a genetically homogeneous Swedish population. Seven polymorphisms were analysed, spanning functionally important regions of the insulin receptor locus. Four of these polymorphisms were mapped more accurately within the gene compared to previous studies. The genotype distribution was compared in 76 Type 2 diabetic patients and 84 healthy control subjects. No significant differences were found in the distribution of genotypes between diabetic and control subjects at the p less than 0.01 level. In order to study the possible association between quantitative measures of glucose metabolism and these DNA polymorphisms, the fasting glucose and insulin concentrations were compared in the different genotype groups of control subjects and mildly diabetic patients treated with diet. No differences in fasting glucose or insulin concentrations were found at the p less than 0.005 level of significance. In conclusion, no significant associations were found between insulin receptor gene DNA polymorphisms and glucose intolerance.
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Affiliation(s)
- M Sten-Linder
- Department of Clinical Genetics, Karolinska Institute, Karolinska Hospital, Stockholm, Sweden
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Granqvist M, Stern I. [Diabetes research. A blood test predicts the occurrence of old-age diabetes in the future]. Vardfacket 1990; 14:XXI-XXIV. [PMID: 2092538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Ekstrand J, Ehrenborg E, Stern I, Stellan B, Zech L, Luthman H. The gene for insulin-like growth factor-binding protein-1 is localized to human chromosomal region 7p14-p12. Genomics 1990; 6:413-8. [PMID: 1691735 DOI: 10.1016/0888-7543(90)90470-f] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Insulin-like growth factors (IGF) I and II are bound to high-affinity binding proteins in the blood circulation and other body fluids. These IGF-binding proteins are expressed at different concentrations in different tissues and are thought to regulate the activity of IGF I and II. Cloned cDNA for IGF-binding protein-1 (IGFBP1) has been used to verify the location of its gene to human chromosome 7 by Southern blotting to DNA from a human-mouse hybrid cell line. Further, by in situ hybridization the gene was regionally localized to 7p14-p12, and a Mendelian-inherited two-allele BglII restriction enzyme length polymorphism was identified, with the most frequent allele occurring in 53% of the chromosomes.
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Affiliation(s)
- J Ekstrand
- Ludwig Institute for Cancer Research, Stockholm Branch, Sweden
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Sten-Linder M, Granqvist M, Stern I, Bell GI, Luthman H. DraI and PstI RFLPs in the tyrosine hydroxylase (TH) and insulin gene (INS) region of chromosome 11. Nucleic Acids Res 1989; 17:5873. [PMID: 2569725 PMCID: PMC318234 DOI: 10.1093/nar/17.14.5873] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- M Sten-Linder
- Department of Clinical Genetics, Karolinska Hospital, Stockholm, Sweden
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Luthman H, Söderling-Barros J, Persson B, Engberg C, Stern I, Lake M, Franzén SA, Israelsson M, Rådén B, Lindgren B. Human insulin-like growth-factor-binding protein. Low-molecular-mass form: protein sequence and cDNA cloning. Eur J Biochem 1989; 180:259-65. [PMID: 2466665 DOI: 10.1111/j.1432-1033.1989.tb14641.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Two different insulin-like growth-factor (IGF)-binding proteins have been found in human blood, one of high molecular mass and dependent on growth hormone for synthesis, the other of low molecular mass and independent of growth hormone. The small IGF-binding protein is abundant in human amniotic fluid. Its amino acid sequence has now been determined by direct analysis of the protein and its proteolytic fragments. Also, by immunoscreening a partial cDNA clone was isolated from a human hepatoma cell line. The mature protein consists of 234 amino acids and is coded for by an mRNA of approximately 1700 nucleotides in length. The primary structure of the protein reveals 18 Cys residues in N-terminal and C-terminal clusters and an Arg-Gly-Asp peptide sequence, common to extracellular proteins binding to receptors of the integrin family. A protein-sequence polymorphism was detected at position Ile/Met-228, indicating possible allelic variation. The 3'-untranslated mRNA sequence has a high A + T content and shows five copies of an ATTTA sequence, which has been shown to be involved in the regulation of the stability of certain mRNAs coding for growth-regulating proteins.
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Affiliation(s)
- H Luthman
- Department of Clinical Genetics, Karolinska Institutet, Stockholm
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Affiliation(s)
- M Sten-Linder
- Department of Clinical Genetics, Karolinska Hospital, Stockholm, Sweden
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Abstract
This study describes the changes in chymopapain-specific IgE antibody levels in patients following chemonucleolysis with Chymodiactin. Using the ChymoFAST method, chymopapain-specific IgE values were studied in 91 patients prior to and for 2 months post-Chymodiactin chemonucleolysis. A total of 8.8% (17/91) developed IgE levels greater than or equal to 0.06 IU/ml. Those patients with detectable IgE levels prior to chemonucleolysis were more likely than those with nondetectable preinjection levels (36.4% versus 4%) to develop chymopapain-specific IgE levels greater than or equal to 0.06 IU/ml.
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Ríha J, Vázný T, Stern I, Stern J. [The ideal cholecystectomy and its advantages]. Rozhl Chir 1982; 61:455-62. [PMID: 7135082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Abstract
Previous studies have shown an impaired pancreatic polypeptide response to secretin in most patients with advanced chronic pancreatitis, but the sensitivity of the investigation in milder degrees of chronic pancreatitis remains unclear. In the present study the pancreatic polypeptide response to secretin was evaluated in 32 patients categorised as having advanced, moderate, or minimal chronic pancreatitis on the basis of the degree of abnormality of the retrograde pancreatogram. The pancreatic polypeptide response was abnormal (peak:basal pancreatic polypeptide ratio less than 5) in 17 of 19 patients (90%) with advanced or moderate chronic pancreatitis, but was normal in patients with minimal disease. The simple and non-invasive nature of this test makes it an attractive investigation for evaluation of the severity of pancreatic damage.
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Vázný T, Ríha J, Stern I, Stern J. [Cholecystectomy and ideal cholecystectomy--evaluation of results based on the subjective difficulties of 1000 surgical patients]. Cesk Gastroenterol Vyz 1978; 32:536-8. [PMID: 737790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Ben-Sira Z, Aviram U, Stern I, Shoham I. A facet theoretical approach to psychosomatic complaints. Isr Ann Psychiatr Relat Discip 1978; 16:219-31. [PMID: 282278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Stern I, Giddon DB. Topical anesthesia for periodontal procedures. Anesth Prog 1975; 22:105-108. [PMID: 19598486 PMCID: PMC2235681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
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Krawiec I, Perlman A, Glickman M, Stern I. [Surgical treatment of hyperinsulinism]. Harefuah 1972; 83:329-30. [PMID: 4669723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Pointner H, Geyer G, Stern I. [Studies on the corticotropic effectiveness of a synthetic, ACTH-like pentacosapeptide in man]. Wien Klin Wochenschr 1968; 80:668-71. [PMID: 4300460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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31
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