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Chernysheva M, Loveless SC, Brossard T, Becker K, Cingoranelli S, Aluicio-Sarduy E, Song J, Ellison P, Nolen J, Rotsch DA, Lapi SE, Engle JW. Accelerator Production of Scandium Radioisotopes: Sc-43, Sc-44, and Sc-47. Curr Radiopharm 2021; 14:359-373. [PMID: 33438551 DOI: 10.2174/1874471014999210112205535] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 10/02/2020] [Accepted: 10/12/2020] [Indexed: 11/22/2022]
Abstract
Scandium radioisotopes are increasingly considered viable radiolabels for targeted molecular imaging (Sc-43, Sc-44) and therapy (Sc-47). Significant technological advances have increased the quantity and quality of available radioscandium in the past decade, motivated in part by the chemical similarity of scandium to therapeutic radionuclides like Lu-177. The production and radiochemical isolation techniques applied to scandium radioisotopes are reviewed, focusing on charged particle and electron linac initiated reactions and using calcium and titanium as starting materials.
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Affiliation(s)
- Margarita Chernysheva
- Departments of Medical Physics and Radiology, University of Wisconsin Madison B1303 WIMR Cyclotron Laboratory, 1111 Highland Avenue, Madison WI 53705, United States
| | - Shaun C Loveless
- Departments of Radiology and Chemistry, University of Alabama at Birmingham 1824 6th Avenue South, Birmingham, AL35233-3300, United Kingdom
| | - Tom Brossard
- Chemical and Fuel Cycle Technologies Division, Argonne National Laboratory, 9700 S. Cass Ave, Lemont IL 60439, United States
| | - Kaelyn Becker
- Departments of Medical Physics and Radiology, University of Wisconsin Madison B1303 WIMR Cyclotron Laboratory, 1111 Highland Avenue, Madison WI 53705, United States
| | - Shelbie Cingoranelli
- Departments of Radiology and Chemistry, University of Alabama at Birmingham 1824 6th Avenue South, Birmingham, AL35233-3300, United Kingdom
| | - Eduardo Aluicio-Sarduy
- Departments of Medical Physics and Radiology, University of Wisconsin Madison B1303 WIMR Cyclotron Laboratory, 1111 Highland Avenue, Madison WI 53705, United States
| | - Jeongseong Song
- Physics Division, Argonne National Laboratory, 9700 S. Cass Ave, Lemont IL 60439, United States
| | - Paul Ellison
- Departments of Medical Physics and Radiology, University of Wisconsin Madison B1303 WIMR Cyclotron Laboratory, 1111 Highland Avenue, Madison WI 53705, United States
| | - Jerry Nolen
- Physics Division, Argonne National Laboratory, 9700 S. Cass Ave, Lemont IL 60439, United States
| | - David A Rotsch
- Physics Division, Argonne National Laboratory, 9700 S. Cass Ave, Lemont IL 60439, United States
| | - Suzanne E Lapi
- Departments of Radiology and Chemistry, University of Alabama at Birmingham 1824 6th Avenue South, Birmingham, AL35233-3300, United Kingdom
| | - Jonathan W Engle
- Departments of Medical Physics and Radiology, University of Wisconsin Madison B1303 WIMR Cyclotron Laboratory, 1111 Highland Avenue, Madison WI 53705, United States
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Rotsch D, Brossard T, Bihmidine S, Ying W, Gaddam V, Harmata M, Robertson JD, Swyers M, Jurisson SS, Braun DM. Radiosynthesis of 6'-Deoxy-6'[18F]Fluorosucrose via Automated Synthesis and Its Utility to Study In Vivo Sucrose Transport in Maize (Zea mays) Leaves. PLoS One 2015; 10:e0128989. [PMID: 26024520 PMCID: PMC4449027 DOI: 10.1371/journal.pone.0128989] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Accepted: 05/01/2015] [Indexed: 01/08/2023] Open
Abstract
Sugars produced from photosynthesis in leaves are transported through the phloem tissues within veins and delivered to non-photosynthetic organs, such as roots, stems, flowers, and seeds, to support their growth and/or storage of carbohydrates. However, because the phloem is located internally within the veins, it is difficult to access and to study the dynamics of sugar transport. Radioactive tracers have been extensively used to study vascular transport in plants and have provided great insights into transport dynamics. To better study sucrose partitioning in vivo, a novel radioactive analog of sucrose was synthesized through a completely chemical synthesis route by substituting fluorine-18 (half-life 110 min) at the 6' position to generate 6'-deoxy-6'[(18)F]fluorosucrose ((18)FS). This radiotracer was then used to compare sucrose transport between wild-type maize plants and mutant plants lacking the Sucrose transporter1 (Sut1) gene, which has been shown to function in sucrose phloem loading. Our results demonstrate that (18)FS is transported in vivo, with the wild-type plants showing a greater rate of transport down the leaf blade than the sut1 mutant plants. A similar transport pattern was also observed for universally labeled [U-(14)C]sucrose ([U-(14)C]suc). Our findings support the proposed sucrose phloem loading function of the Sut1 gene in maize, and additionally demonstrate that the (18)FS analog is a valuable, new tool that offers imaging advantages over [U-(14)C]suc for studying phloem transport in plants.
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Affiliation(s)
- David Rotsch
- Department of Chemistry, University of Missouri, Columbia, Missouri, United States of America
| | - Tom Brossard
- Department of Chemistry, University of Missouri, Columbia, Missouri, United States of America
| | - Saadia Bihmidine
- Division of Biological Sciences, Interdisciplinary Plant Group and the Missouri Maize Center, University of Missouri, Columbia, Missouri, United States of America
| | - Weijiang Ying
- Department of Chemistry, University of Missouri, Columbia, Missouri, United States of America
| | - Vikram Gaddam
- Department of Chemistry, University of Missouri, Columbia, Missouri, United States of America
| | - Michael Harmata
- Department of Chemistry, University of Missouri, Columbia, Missouri, United States of America
| | - J. David Robertson
- Department of Chemistry, University of Missouri, Columbia, Missouri, United States of America
- University of Missouri Research Reactor, University of Missouri, Columbia, Missouri, United States of America
| | - Michael Swyers
- Division of Biological Sciences, Interdisciplinary Plant Group and the Missouri Maize Center, University of Missouri, Columbia, Missouri, United States of America
| | - Silvia S. Jurisson
- Department of Chemistry, University of Missouri, Columbia, Missouri, United States of America
| | - David M. Braun
- Division of Biological Sciences, Interdisciplinary Plant Group and the Missouri Maize Center, University of Missouri, Columbia, Missouri, United States of America
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Bouzillé G, Brossard T, Andreu N, Vasseur S, Lepoittevin L, Weil D. Implication du département d’information médicale du CHU d’Angers dans la préparation à la certification des comptes. Rev Epidemiol Sante Publique 2013. [DOI: 10.1016/j.respe.2013.01.070] [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: 11/28/2022] Open
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Abstract
"After more than a century of decline, noticeable increases in the rural population of France became apparent in the 1982 census. The spatial patterns of these changes are interpreted by comparing a set of demographic variables in the 1968-1975 and 1975-1982 intercensal periods. Migration to rural areas near many of the major cities (rurbanization) and to the southern part of France is the main demographic explanation. Using factor analysis and a hierarchical classification system the underlying demographic associations are established and the nation is differentiated into seven types. A method for estimating the probabilities of any one type occurring is also demonstrated. The timing of the demographic changes and the fundamental societal forces which have influenced them suggest that government policy has played a minor part in the evolution."
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Reinberg A, Brossard T, Andre MF, Joly D, Malaurie J, Lévi F, Nicolai A. Interindividual differences in a set of biological rhythms documented during the high arctic summer (79 degrees N) in three healthy subjects. Chronobiol Int 1984; 1:127-38. [PMID: 6600018 DOI: 10.3109/07420528409059130] [Citation(s) in RCA: 11] [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: 01/20/2023]
Abstract
The High Arctic summer with its permanent sunlight provides a situation in which one of the natural synchronizers, the light-dark alternation, is minimal. During the summers of 1981 and 1982 three healthy right-handed geographers who were performing field studies in Svalbard as part of their own research volunteered to document, 4-6 times per 24 hr for respectively 63, 141 and 147 days, a set of circadian rhythms: self-rated fatigue, oral temperature, grip strength of both hands, heart rate and times of awakening and retiring. Tests were performed before departure from France, in Svalbard (79 degrees N latitude) where their daily activities were often strenuous, and after returning to France. Time series were treated individually according to three methods: display of data as a function of time, cosinor analyses to quantify rhythm parameters, and spectral analyses to estimate component periods of rhythms. Circadian parameters such as period and acrophase of activity-rest, oral temperature and fatigue rhythms were not altered. On the other hand, the circadian rhythm in grip strength was altered: the period differed from 24 hr in one subject, while grip strength acrophase of the left, but not the right, hand of the other two subjects was phase shifted during the sojourn in Svalbard. A prominent circahemidian (about 12 hr) rhythm was observed in two subjects for their heart rate in Svalbard, while a prominent circadian rhythm (differing from exactly 24 hr) was observed in France associated with a small circahemidian component.
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Affiliation(s)
- A Reinberg
- Chronobiologie Humaine, E.R. CNRS N 105 Fondation A. de Rothschild, Paris, France
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