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Stukel M, Hariasz L, Di Stefano PCF, Rasco BC, Rykaczewski KP, Brewer NT, Stracener DW, Liu Y, Gai Z, Rouleau C, Carter J, Kostensalo J, Suhonen J, Davis H, Lukosi ED, Goetz KC, Grzywacz RK, Mancuso M, Petricca F, Fijałkowska A, Wolińska-Cichocka M, Ninkovic J, Lechner P, Ickert RB, Morgan LE, Renne PR, Yavin I. Rare ^{40}K Decay with Implications for Fundamental Physics and Geochronology. Phys Rev Lett 2023; 131:052503. [PMID: 37595241 DOI: 10.1103/physrevlett.131.052503] [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: 11/22/2022] [Revised: 05/09/2023] [Accepted: 05/19/2023] [Indexed: 08/20/2023]
Abstract
Potassium-40 is a widespread, naturally occurring isotope whose radioactivity impacts subatomic rare-event searches, nuclear structure theory, and estimated geological ages. A predicted electron-capture decay directly to the ground state of argon-40 has never been observed. The KDK (potassium decay) collaboration reports strong evidence of this rare decay mode. A blinded analysis reveals a nonzero ratio of intensities of ground-state electron-captures (I_{EC^{0}}) over excited-state ones (I_{EC^{*}}) of I_{EC^{0}}/I_{EC^{*}}=0.0095±[over stat]0.0022±[over sys]0.0010 (68% C.L.), with the null hypothesis rejected at 4σ. In terms of branching ratio, this signal yields I_{EC^{0}}=0.098%±[over stat]0.023%±[over sys]0.010%, roughly half of the commonly used prediction, with consequences for various fields [27L. Hariasz et al., companion paper, Phys. Rev. C 108, 014327 (2023)PRVCAN2469-998510.1103/PhysRevC.108.014327].
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Affiliation(s)
- M Stukel
- Department of Physics, Engineering Physics & Astronomy, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - L Hariasz
- Department of Physics, Engineering Physics & Astronomy, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - P C F Di Stefano
- Department of Physics, Engineering Physics & Astronomy, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - B C Rasco
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - K P Rykaczewski
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - N T Brewer
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Joint Institute for Nuclear Physics and Application, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - D W Stracener
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Y Liu
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Z Gai
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - C Rouleau
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - J Carter
- Berkeley Geochronology Center, Berkeley, California 94709, USA
| | - J Kostensalo
- Natural Resources Institute Finland, Joensuu FI-80100, Finland
| | - J Suhonen
- Department of Physics, University of Jyväskylä, Jyväskylä FI-40014, Finland
| | - H Davis
- Department of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
- Joint Institute for Advanced Materials, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - E D Lukosi
- Department of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
- Joint Institute for Advanced Materials, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - K C Goetz
- Nuclear and Extreme Environments Measurement Group, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - R K Grzywacz
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Joint Institute for Nuclear Physics and Application, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - M Mancuso
- Max-Planck-Institut für Physik, Munich D-80805, Germany
| | - F Petricca
- Max-Planck-Institut für Physik, Munich D-80805, Germany
| | - A Fijałkowska
- Faculty of Physics, University of Warsaw, Warsaw PL-02-093, Poland
| | - M Wolińska-Cichocka
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Joint Institute for Nuclear Physics and Application, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Heavy Ion Laboratory, University of Warsaw, Warsaw PL-02-093, Poland
| | - J Ninkovic
- MPG Semiconductor Laboratory, Munich D-80805, Germany
| | - P Lechner
- MPG Semiconductor Laboratory, Munich D-80805, Germany
| | - R B Ickert
- Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, Illinois 47907, USA
| | - L E Morgan
- U.S. Geological Survey, Geology, Geophysics, and Geochemistry Science Center, Denver, Colorado 80225, USA
| | - P R Renne
- Berkeley Geochronology Center, Berkeley, California 94709, USA
- Department of Earth and Planetary Science, University of California, Berkeley, California 94720, USA
| | - I Yavin
- Department of Physics, Engineering Physics & Astronomy, Queen's University, Kingston, Ontario K7L 3N6, Canada
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Joint Institute for Nuclear Physics and Application, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Berkeley Geochronology Center, Berkeley, California 94709, USA
- Natural Resources Institute Finland, Joensuu FI-80100, Finland
- Department of Physics, University of Jyväskylä, Jyväskylä FI-40014, Finland
- Department of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
- Joint Institute for Advanced Materials, University of Tennessee, Knoxville, Tennessee 37996, USA
- Nuclear and Extreme Environments Measurement Group, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
- Max-Planck-Institut für Physik, Munich D-80805, Germany
- Faculty of Physics, University of Warsaw, Warsaw PL-02-093, Poland
- Heavy Ion Laboratory, University of Warsaw, Warsaw PL-02-093, Poland
- MPG Semiconductor Laboratory, Munich D-80805, Germany
- Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, Illinois 47907, USA
- U.S. Geological Survey, Geology, Geophysics, and Geochemistry Science Center, Denver, Colorado 80225, USA
- Department of Earth and Planetary Science, University of California, Berkeley, California 94720, USA
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Williamson T, Drogos L, Arena R, Aggarwal S, Campbell T, Rouleau C. SEX DIFFERENCES IN THE IMPACT OF SYMPTOMS OF ANXIETY AND DEPRESSION ON CARDIAC REHABILITATION PARTICIPATION AND OUTCOMES. Can J Cardiol 2021. [DOI: 10.1016/j.cjca.2021.07.175] [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: 11/25/2022] Open
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Giacalone P, Bourdon A, Trinh P, Taourel P, Rathat G, Sainmont M, Perocchia H, Rossi M, Rouleau C. Radioguided occult lesion localization plus sentinel node biopsy (SNOLL) versus wire-guided localization plus sentinel node detection: A case control study of 129 unifocal pure invasive non-palpable breast cancers. Eur J Surg Oncol 2012; 38:222-9. [DOI: 10.1016/j.ejso.2011.12.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Revised: 11/21/2011] [Accepted: 12/12/2011] [Indexed: 01/17/2023] Open
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Haouzi D, Olivennes F, Letur H, Cohen-Bacrie P, Rouleau C, Hamamah S. Unexpected results of endometrial biopsy for both morphological and genomic evaluations during recipient patient preparation for egg donation. Fertil Steril 2011. [DOI: 10.1016/j.fertnstert.2011.07.343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Valdez Domingos FX, Oliveira Ribeiro CA, Pelletier É, Rouleau C. Tissue distribution and depuration kinetics of waterborne 14C-labeled light PAHs in mummichog (Fundulus heteroclitus). Environ Sci Technol 2011; 45:2684-2690. [PMID: 21388175 DOI: 10.1021/es103133h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Light polycyclic aromatic hydrocarbons (PAHs) of petrogenic origin are commonly found in estuaries and coastal areas. Though they are known to be toxic to fish, little is known about their uptake and tissue distribution. This paper reports on the results of a study on uptake, elimination, and tissue distribution of three waterborne 14C-labeled PAHs in the mummichog, Fundulus heteroclitus, using whole-body autoradiography. After a 24 h exposure to 1 μCi·L(-1) of 14C-naphthalene, 14C-1-naphthol, and 14C-phenanthrene, fish were transferred to clean water and tissue distribution examined after 0, 1, 3, 7, 14, and 21 days of depuration. All compounds were readily accumulated by fish and were also rapidly eliminated (t0.5 range=1.1 to 3.0 days). Most of the radioactivity in naphthalene- and phenanthrene-treated fish was found in gall bladder≫liver>intestinal lumen. In naphthol-exposed fish, an important labeling of some brain areas was observed. Brain of naphthalene-exposed fish was also labeled after 24 h depuration, indicating that exposure to naphthalene may result in metabolite accumulation in the brain. This is the first study showing that naphthalene, naphthol, and/or unidentified metabolite(s) can accumulate in brain tissues, which may impair normal brain function.
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Affiliation(s)
- F X Valdez Domingos
- Departamento de Biologia Celular, Universidade Federal do Paraná, C.P. 19031, CEP: 81531-970 Curitiba PR, Brazil
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Fournet S, Giacalone P, Rathat G, Rouleau C. False positive lymph node activity on positron emission tomography (PET/CT) due to hemostatic compresses. J Visc Surg 2011; 148:e153-5. [DOI: 10.1016/j.jviscsurg.2011.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Palial KK, Drury J, Heathcote L, Valentijin A, Farquharson RG, Gazvani R, Rudland PS, Hapangama DK, Celik N, Celik O, Aktan E, Ozerol E, Celik E, Bozkurt K, Paran H, Hascalik S, Ozerol I, Arase T, Maruyama T, Uchida H, Miyazaki K, Oda H, Uchida-Nishikawa S, Kagami M, Yamazaki A, Tamaki K, Yoshimura Y, De Vos M, Ortega C, Smitz J, Van Vaerenbergh I, Bourgain C, Devroey P, Luciano D, Exacoustos C, Zupi E, Luciano AA, Arduini D, Palomino WA, Argandona F, Kohen P, Azua R, Scarella A, Devoto L, McKinnon B, Bersinger NA, Mueller MD, Bonavita M, Mattila M, Ferreira FP, Maia-Filho V, Rocha AM, Serafini P, Motta ELA, Kim H, Kim CH, You RM, Nah HY, Lee JW, Kang HJ, Kang BM, Letur - Koenirsch H, Haouzi D, Olivennes F, Rouleau C, Cohen-Bacri P, Dechaud H, Hamamah S, D'Hooghe T, Hummelshoj L, Dunselman GAJ, Dirksen CD, EndoCost Consortium WERF, Simoens S, Novembri R, Luisi S, Carrarelli P, Rocha ALL, Toti P, Reis FM, Florio P, Petraglia F, Bruce KD, Sadek KH, Macklon N, Cagampang FR, Cheong Y, Goudakou M, Kalogeraki A, Matalliotakis I, Papatheodorou A, Pasadaki T, Karkanaki A, Prapas I, Prapas I, Kalogeraki A, Matalliotakis I, Panagiotidis I, Kasapi E, Karkanaki A, Goudakou M, Barlow D, Oliver J, Loumaye E, Khanmohammadi M, kazemnejad S, darzi S, Khanjani S, Zarnani A, Akhondi M, Tan CW, Ng CP, Loh SF, Tan HH, Choolani M, Griffith L, Chan J, Andersson KL, Sundqvist J, Scarselli G, Gemzell-Danielsson K, Lalitkumar PG, Jana S, Chattopadhyay R, Datta Ray C, Chaudhury K, Chakravarty BN, Hannan N, Evans J, Hincks C, Rombauts LJF, Salamonsen LA, Choi D, Lee J, Park J, Chang H, Kim M, Hwang K, Takeuchi K, Kurematsu T, Fukumoto Y, Yuki Y, Kuroki Y, Homan Y, Sata Y, Takeuchi M, Munoz Munoz E, Ortiz Olivera G, Fernandez Lopez I, Martinez Martinez B, Aguilar Prieto J, Portela Perez S, Pellicer Martinez A, Keltz M, Sauerbrun M, Breborowicz A, Gonzales E, Vicente-Munoz S, Puchades-Carrasco L, Morcillo I, Hidalgo JJ, Gilabert-Estelles J, Novella-Maestre E, Pellicer A, Pineda-Lucena A, Yavorovskaya KA, Okhtyrskaya TA, Demura TA, Faizulina NM, Ezhova LS, Kogan EA, Bilibio JP, Souza CAB, Rodini GP, Genro V, Andreoli CG, de Conto E, Cunha-Filho JSL, Saare M, Soritsa D, Jarva L, Vaidla K, Palta P, Laan M, Karro H, Soritsa A, Salumets A, Peters M, Miskova A, Pilmane M, Rezeberga D, Haouzi D, Dechaud H, Assou S, Letur H, Olivennes F, Hamamah S, Piomboni P, Stendardi A, Gambera L, De Leo V, Petraglia F, Focarelli R, Tamm K, Simm J, Salumets A, Metsis M, Vodolazkaia A, Fassbender A, Kyama CM, Bokor A, Schols D, Huskens D, Meuleman C, Peeraer K, Tomassetti C, D'Hooghe TM, Machens K, Afhuppe W, Schulz A, Diefenbach K, Schutt B, Faustmann T, Reischl J, Peters M, Altmae S, Reimand J, Laisk T, Saare M, Hovatta O, Kolde R, Vilo J, Stavreus-Evers A, Salumets A, Lee JH, Kim SG, Kim YY, Park IH, Sun HG, Lee KH, Ezoe K, Kawano H, Yabuuchi A, Ochiai K, Nagashima H, Osada H, Kagawa N, Kato O, Tamura I, Asada H, Taketani T, Tamura H, Sugino N, Garcia Velasco J, Prieto L, Quesada JF, Cambero O, Toribio M, Pellicer A, Hur CY, Lim KS, Lee WD, Lim JH, Germeyer A, Nelson L, Graham A, Jauckus J, Strowitzki T, Lessey B, Gyulmamedova I, Illina O, Illin I, Mogilevkina I, Chaika A, Nosenko O, Boykova I, Gulmamedova E, Isik H, Moraloglu O, Seven ALI, Kilic S, Erkayiran U, Caydere M, Batioglu S, Alhalabi M, Samawi S, Taha A, Kafri N, Modi S, Khatib A, Sharif J, Othman A, Lancuba S, Branzini C, Lopez M, Baricalla A, Cristina C, Chen J, Jiang Y, Zhen X, Hu Y, Yan G, Sun H, Mizumoto J, Ueno J, Carvalho FM, Casals G, Ordi J, Guimera M, Creus M, Fabregues F, Casamitjana R, Carmona F, Balasch J, Choi YS, Kim KC, Lee WD, Kim KH, Lee BS, Kim SH, Fassbender A, Overbergh L, Verdrengh E, Kyama C, Vodolazkaia A, Bokor A, Meuleman C, Peeraer K, Tomassetti C, Waelkens E, Mathieu C, D'Hooghe T, Iwasa T, Hatano K, Hasegawa E, Ito H, Isaka K, L. Rocha AL, Luisi S, Carrarelli P, Novembri R, Florio P, Reis F, Petraglia F, Lee KS, Joo JK, Son JB, Choi JR, Vidali A, Barad DH, Gleicher N, Jiang Y, Chen J, Zhen X, Hu Y, Sun H, Yan G, Sayyah-Melli M, Kazemi-Shishvan M. POSTER VIEWING SESSION - ENDOMETRIOSIS, ENDOMETRIUM, IMPLANTATION AND FALLOPIAN TUBE. Hum Reprod 2011. [DOI: 10.1093/humrep/26.s1.80] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Giacalone PL, Rathat G, Fournet S, Rouleau C. Surgical treatment of recurring subareolar abscess using oncoplastic techniques. J Visc Surg 2010; 147:e389-94. [DOI: 10.1016/j.jviscsurg.2010.10.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Nicolet G, Rouleau C, Flandrin A, Giacalone PL. Un cas de siliconome thoracique mimant une tumeur du muscle petit pectoral. ANN CHIR PLAST ESTH 2010; 55:249-51. [DOI: 10.1016/j.anplas.2009.06.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2008] [Accepted: 06/07/2009] [Indexed: 11/29/2022]
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Lacoue-Labarthe T, Warnau M, Metian M, Oberhänsli F, Rouleau C, Bustamante P. Biokinetics of Hg and Pb accumulation in the encapsulated egg of the common cuttlefish Sepia officinalis: radiotracer experiments. Sci Total Environ 2009; 407:6188-6195. [PMID: 19783030 DOI: 10.1016/j.scitotenv.2009.09.003] [Citation(s) in RCA: 3] [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] [Received: 08/05/2009] [Revised: 09/04/2009] [Accepted: 09/07/2009] [Indexed: 05/28/2023]
Abstract
Uptake and depuration kinetics of dissolved (203)Hg and (210)Pb were determined during the entire embryonic development of the eggs of the cuttlefish, Sepia officinalis (50d at 17 degrees C). (203)Hg and (210)Pb were accumulated continuously by the eggs all along the development time reaching load/concentration ratio (LCR) of 467+/-43 and 1301+/-126g, respectively. During the first month, most of the (203)Hg and (210)Pb remained associated with the eggshell indicating that the latter acted as an efficient shield against metal penetration. From this time onwards, (203)Hg accumulated in the embryo, indicating that it passed through the eggshell, whereas (210)Pb did not cross the chorion during the whole exposure time. It also demonstrated that translocation of Hg associated with the inner layers of the eggshell is a significant source of exposure for the embryo. This study highlighted that the maturing embryo could be subjected to the toxic effects of Hg in the coastal waters where the embryonic development is taking place.
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Affiliation(s)
- T Lacoue-Labarthe
- Littoral, Environnement et Sociétés (LIENSs), UMR 6250, CNRS-Université de La Rochelle, F-17042 La Rochelle Cedex 01, France.
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Rouleau C, Bongrand AF, Pidoux O, Roustan E, Martrille L, Picaud JC, Costes-Martineau V, Cambonie G. Sudden infant death syndrome (SIDS): characteristics of deaths since the fall in SIDS in the French region of Languedoc-Roussillon. Arch Dis Child 2009; 94:894-6. [PMID: 19666458 DOI: 10.1136/adc.2009.161901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The characteristics of sudden infant death syndrome (SIDS) in the French region of Languedoc-Roussillon from 2003-2008 were examined in a retrospective study of two groups classified as unexplained sudden unexpected death in infancy (SUDI) (SIDS, n = 27) or explained SUDI (n = 22). The interval between the time the baby was last observed alive (time of last feed) and the discovery of death was evaluated. In SIDS, 67% (18/27) of deaths were discovered during the day (09:00-21:00 h) mostly within 4 h after feeding (66%). In explained SUDI, 68.2% of deaths were discovered at night and time intervals between the last feed and discovery of death were longer (mean 7.1 h, p<0.01). Most SIDS deaths were discovered during the day and explained SUDI discovered at night. Variations in time between the last feed and discovery of death in the two groups may result from differences in parental attentiveness during the day and at night.
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Affiliation(s)
- C Rouleau
- Department of Pathology, Lapeyronie Hospital, 34295 Montpellier, France.
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Rouleau C, Weber W, Bagley R, Morgenbesser SD, Kataoka S, Honma N, Hasegawa K, Ishida I, Thurberg BL, Teicher BA. Endosialin/TEM1: Cellular localization and prevalence in soft-tissue tumors and carcinomas. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.20520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
20520 Background: Tumors grow more slowly in endosialin/TEM1 KO mice compared to WT, suggesting that host endosialin/TEM1-positive stroma promotes malignancy (Nanda, PNAS, 2006). Methods: We surveyed 92 human clinical samples by IHC (52 epithelial tumors, 40 sarcomas) to measure the extent of endosialin/TEM1 expression and assess cellular localization. Expression was also studied in primary cell cultures and 49 cancer lines. Results: 46/52 adenocarcinomas and carcinomas (88.5%) expressed endosialin/TEM1 mainly in pericytes (7/7 bladder, 7/11 breast, 5/5 colon, 7/8 ovarian, 7/7 renal, 2/2 liver, 4/5 lung, and 7/7 gastric). In some tumors, endosialin/TEM1 was present in pericytes and in fibroblasts (2/7 bladder, 4/11 breast, 5/5 colon, 5/8 ovarian, 2/7 renal, 2/2 liver, 1/5 lung and 7/7 gastric cancers). 32/40 sarcomas (80%) expressed endosialin/TEM1 mainly in pericytes (10/11 synovial sarcomas, 9/10 malignant fibrous histiocytomas, 3/5 Ewing's sarcomas, 3/5 angiosarcomas, 3/4 rhabdomyosarcomas, 2/2 pleiomorphic sarcomas, 1/1 Kaposi's sarcoma, 0/1 leiomyosarcoma and 1/1 liposarcoma). Synovial sarcomas displayed intense fibroblast staining. Endosialin/TEM1 was expressed by sarcoma cells in a few samples. In culture, we previously showed expression in human fibroblasts, endothelial precursor cells, pericytes and mesenchymal stem cells (MSC). We now report that endosialin/TEM1 mRNA is present in MSC during osteogenic and adipogenic differentiation. In 49 human tumor lines, expression was restricted to sarcoma cells (7/15 sarcoma, 0/5 melanoma, 0/2 neuroblastoma, 0/4 breast, 0/1 ovarian, 0/3 prostate, 0/1 renal, 0/1 liver, 0/3 pancreatic, 0/6 colorectal and 0/8 hematopoietic cancer lines). Conclusions: Endosialin/TEM1 is frequently expressed in clinical cancer (85% of 92 samples), both in epithelial and mesenchymal tumors. Cellular expression is mesenchymal in clinical samples and in culture. In tissues, endosialin/TEM1 is present in pericytes and fibroblasts, with some expression in sarcoma cells. The importance of endosialin/TEM1-positive stroma in experimental animals and prevalence in patient samples warrant further investigation. Endosialin/TEM1 may be a useful therapeutic target. [Table: see text]
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Affiliation(s)
- C. Rouleau
- Genzyme Analytical Services and Genzyme Stem Cell, Genzyme Corp., Framingham, MA; Kirin Brewery Co., Takasaki, Japan
| | - W. Weber
- Genzyme Analytical Services and Genzyme Stem Cell, Genzyme Corp., Framingham, MA; Kirin Brewery Co., Takasaki, Japan
| | - R. Bagley
- Genzyme Analytical Services and Genzyme Stem Cell, Genzyme Corp., Framingham, MA; Kirin Brewery Co., Takasaki, Japan
| | - S. D. Morgenbesser
- Genzyme Analytical Services and Genzyme Stem Cell, Genzyme Corp., Framingham, MA; Kirin Brewery Co., Takasaki, Japan
| | - S. Kataoka
- Genzyme Analytical Services and Genzyme Stem Cell, Genzyme Corp., Framingham, MA; Kirin Brewery Co., Takasaki, Japan
| | - N. Honma
- Genzyme Analytical Services and Genzyme Stem Cell, Genzyme Corp., Framingham, MA; Kirin Brewery Co., Takasaki, Japan
| | - K. Hasegawa
- Genzyme Analytical Services and Genzyme Stem Cell, Genzyme Corp., Framingham, MA; Kirin Brewery Co., Takasaki, Japan
| | - I. Ishida
- Genzyme Analytical Services and Genzyme Stem Cell, Genzyme Corp., Framingham, MA; Kirin Brewery Co., Takasaki, Japan
| | - B. L. Thurberg
- Genzyme Analytical Services and Genzyme Stem Cell, Genzyme Corp., Framingham, MA; Kirin Brewery Co., Takasaki, Japan
| | - B. A. Teicher
- Genzyme Analytical Services and Genzyme Stem Cell, Genzyme Corp., Framingham, MA; Kirin Brewery Co., Takasaki, Japan
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Frouin H, Pellerin J, Fournier M, Pelletier E, Richard P, Pichaud N, Rouleau C, Garnerot F. Physiological effects of polycyclic aromatic hydrocarbons on soft-shell clam Mya arenaria. Aquat Toxicol 2007; 82:120-34. [PMID: 17353058 DOI: 10.1016/j.aquatox.2007.02.005] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2006] [Revised: 02/04/2007] [Accepted: 02/08/2007] [Indexed: 05/14/2023]
Abstract
The aim of this study was to investigate the effects of polycyclic aromatic hydrocarbons (PAHs) on the physiological status of the bivalve Mya arenaria. Specimens were exposed to four different sources of PAHs: aluminium smelter soot, sediment from an industrial discharge pound, charcoal fine particles and dietary PAHs assessed by feeding clams with phytoplankton freshly impregnated with dissolved PAHs. The exposure period lasted 30 days and bivalves were let to recover for an additional 20 days. At days 8, 15, 30 and 50, immune parameters (phagocytic activity and efficiency) were monitored in haemocytes. Oxidative stress measures such as catalase and lipid peroxidation were quantified in digestive gland as well as concentrations of bioaccumulated PAHs. In a second experiment, clams were exposed to [(14)C]-pyrene via the phytoplankton, and the tissue distribution of radiolabelled compound was studied. Glycogen levels in gonad and digestive gland were also measured and gametogenesis stages were investigated. Results showed a high bioaccumulation in clams exposed to dietary PAHs and contaminated sediments. Tissue distribution of [(14)C]-pyrene revealed that the radiolabelled compound persisted mainly in the gonad during 14 days. A decrease of phagocytosis was observed in contaminated male clams. The lipid peroxidation (malondialdehyde) was found to increase in the digestive gland tissues of clams exposed to dietary PAHs, smelter soot and discharge, but no differences were observed in the catalase activity. A delay in gametogenesis occurred in all exposed males and in females contaminated with coke dust and dietary PAHs. Males were more sensitive than females to PAH exposure. A dysfunction in steroid synthesis is suspected to occur due to the exposure to all sources of PAHs.
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Affiliation(s)
- H Frouin
- Institut des Sciences de la Mer de Rimouski, Université du Québec à Rimouski, 310 Allée des Ursulines, C.P. 3300, Rimouski, Que. G5L 3A1, Canada
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14
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Bagley R, Yao M, Weber W, Rouleau C, Barberio D, Cao X, Agata N, Kaplan J, Roberts B, Teicher B. 60 POSTER Targeting the chemokine receptor CXCR4 and ligand SDF-1/CXCL 12 in tumor vasculature and stroma. EJC Suppl 2006. [DOI: 10.1016/s1359-6349(06)70066-0] [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: 11/30/2022] Open
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15
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Bagley R, Kataoka S, Honma N, Weber W, Hasegawa K, Yao M, Rouleau C, Roberts B, Ishida I, Teicher B. 422 POSTER Endosialin/TEM 1 a tumor stromal target in stem cells, progenitor cells and pericytes. EJC Suppl 2006. [DOI: 10.1016/s1359-6349(06)70427-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Rouleau C, Kataoka S, Honma N, Weber W, Kurtzberg L, Hasegawa K, Bagley R, Morgenbesser S, Ishida I, Teicher B. 372 POSTER Endosialin/TEM-1 glycoprotein: a novel therapeutic target for mesenchymal malignancy. EJC Suppl 2006. [DOI: 10.1016/s1359-6349(06)70377-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Bagley RG, Rouleau C, Weber W, Cao X, Teicher BA. Model development of human sarcomas for identification and validation of new targets. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.13080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
13080 Background: Soft tissue sarcomas are malignant tumors that can develop from a variety of tissues. There is a lack of targeted therapies directed specifically against sarcomas with surgery, radiation, and chemotherapy being the standard of care. By employing multiple strategies, new targets that may advance sarcoma therapy can be identified. Methods: Profiling of secreted cytokines that may drive tumor growth was performed on cell lines representing osteosarcomas, liposarcomas, fibrosarcomas, and rhabdomysarcomas. Of 27 cytokines analyzed from cultured media, the following were most highly expressed: IL-6, IL-8, IL-12p40, SDF-1, and MCP-1. Results: Results were compared against gene expression data from publicly available oligonucleotide microarrays derived from human tumors. Ewing’s sarcoma and rhabdomysarcoma samples confirmed higher expression levels of VEGF. Further analysis of array data from 16 classes of sarcomas and 181 tumors indicated that IL-7 was more predominantly expressed than IL-6 and IL-8. To evaluate efficacy of novel agents, xenograft models were established using human cell lines A673 rhabdomyosarcoma and SW872 liposarcoma. Tumor growth and response to therapy was characterized. Paclitaxel (75 mg/kg, days 7, 9, 11) delayed tumor growth for about one week following treatment in both models, however only SW872 liposarcoma tumors responded after dosing with anti-angiogenic agent, Avastin (5 mg/kg, days 4, 7, 11, 14, 17, and 21). Conclusions: In addition to killing cancer cells, destabilization of the vasculature/stroma may be beneficial. Immunohistochemical (IHC) analysis was performed on sarcoma tumors from the clinic. CD31 and SMA staining identified vasculature and stromal regions. Subsequent to identification of novel targets specific to sarcomas, IHC methods can further define localization of antigens between various tumor components. A variety of techniques are being utilized in order to recognize new targets in sarcomas. Cell-based assays and preclinical models are incorporated into the drug development pathway to evaluate novel drugs. Analysis of differential gene expression between tumor types and amongst sarcoma subtypes will be essential in identifying which patient population will gain the greatest benefits from targeted therapies. [Table: see text]
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Rouleau C, Serre I, Roger P, Guibal MP, Galifer RB, Bonardet A, Baldet P. Acinar cell carcinoma of the pancreas in a young patient with cells immunoreactive for somatostatin. Histopathology 2006; 48:307-9. [PMID: 16430479 DOI: 10.1111/j.1365-2559.2005.02216.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Fallet-Bianco C, Joubert M, Quere M, Bazin A, Bessieres B, Satge D, Rouleau C, Daumas-Duport C. Lésions cérébrales de la Sclérose Tubéreuse de Bourneville : étude topographique, morphologique et immunohistochimique de 15 cas fœtaux et néonataux de diagnostic prénatal. Ann Pathol 2005. [DOI: 10.1016/s0242-6498(05)80129-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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de Oliveira Ribeiro CA, Belger L, Pelletier E, Rouleau C. Histopathological evidence of inorganic mercury and methyl mercury toxicity in the arctic charr (Salvelinus alpinus). Environ Res 2002; 90:217-25. [PMID: 12477467 DOI: 10.1016/s0013-9351(02)00025-7] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In our sustained effort to understand mechanisms of mercury toxicity in fish, the histopathological effects of a 96-h acute exposure to water-borne inorganic mercury (inorganic Hg) (15 micro gL(-1)), as well as those of a single dietary dose of inorganic and methyl mercury (methyl Hg) (0.260.05 micro g.Hgg(-1) body weight), over 30 days were examined. Samples of gills, olfactory epithelium, kidneys, and liver of arctic charr, Salvelinus alpinus, were studied using light and electron microscopy. The distribution of dietary inorganic and methyl Hg in the intestinal epithelium was determined using 203Hg microautoradiography. Gills of fish exposed to water-borne inorganic Hg presented a severe disorganization of epithelial cells after 12h and modifications of cilia of ciliated olfactory cells appeared after 24h. Nevertheless, a partial recovery was seen in both tissues by the end of the 96-h exposure period. Liver was little affected by water-borne and single-trophic-dose contamination of inorganic Hg, but dietary methyl Hg had drastic effects, despite its low dosage, with severe necrosis and alterations of cytoplasmic organization. Microautoradiograms showed that inorganic Hg was distributed evenly in the intestinal epithelium, whereas methyl Hg was found at very specific locations on the epithelial surface.
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Affiliation(s)
- C A de Oliveira Ribeiro
- Departamento de Biologia Celular, Setor de Ciencias Biológicas, Universidade Federal do Paraná, C.P. 19031, CEP 80531-970, PR, Curitiba, Brazil.
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Inza B, Rouleau C, Tjälve H, Ribeyre F, Campbell PG, Pelletier E, Boudou A. Fine-scale tissue distribution of cadmium, inorganic mercury, and methylmercury in nymphs of the burrowing mayfly Hexagenia rigida studied by whole-body autoradiography. Environ Res 2001; 85:265-271. [PMID: 11237516 DOI: 10.1006/enrs.2000.4228] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The distribution of inorganic 109Cd(II), inorganic 203Hg(II), and [203Hg] methylmercury (MeHg) in nymphs of the burrowing mayfly Hexagenia rigida after exposure via water and sediments was studied. To better understand the mechanisms underlying the fate of Cd, Hg, and MeHg in this animal and to identify target organs, autoradiography of whole-body cryosections was used to obtain a detailed view of the distribution of the radiolabels. The gut and exoskeleton were the only structures labeled in nymphs exposed to Cd via water or sediments. After exposure to inorganic Hg via water, the Malpighian tubules exhibited a very high labeling, indicating that these organs may be a target for Hg toxicity. The distribution of Hg after exposure via sediments was similar, though the labeling of Malpighian tubules was less intense. Distribution of MeHg strongly differed between treatment groups. Nymphs were rather uniformly labeled after exposure via water, whereas in those exposed to MeHg in sediments, the intense labeling of all internal tissues contrasted with the very low labeling of the hemolymph, indicating that the translocation rate of the absorbed MeHg was faster in the latter group. This may be related to the complexation of MeHg by small thiol ligands in the gut as a result of the digestion process.
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Affiliation(s)
- B Inza
- LEESA, UMR CNRS 5805, University of Bordeaux 1, Place du Dr Peyneau, Arcachon, 33120, France
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Oliveira Ribeiro CA, Pelletier E, Pfeiffer WC, Rouleau C. Comparative uptake, bioaccumulation, and gill damages of inorganic mercury in tropical and nordic freshwater fish. Environ Res 2000; 83:286-92. [PMID: 10944072 DOI: 10.1006/enrs.2000.4056] [Citation(s) in RCA: 29] [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] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
This paper reports comparative results on the bioaccumulation of inorganic mercury and resulting gill damages in the tropical fish, Trichomycterus zonatus, and a nordic species, Salvelinus alpinus, using radioisotope 203Hg techniques and scanning electron microscopy. Uptake of inorganic Hg from water was much more important in T. zonatus than in S. alpinus and the Hg concentration in S. alpinus increased at a slower rate in all tissues during the first 24 h of exposure. After 96 h, Hg concentration was 70 times higher in the kidney, 10 times higher in liver, intestine, skin, and brain, and 3 times higher in gills, muscle, and the rest of body of T. zonatus compared to S. alpinus. Gill damages in T. zonatus were more evident and occurred much earlier than for S. alpinus. According to our data, the high differences observed in the inorganic mercury uptake, bioaccumulation, and gills damages strongly suggest that T. zonatus is more sensitive to inorganic mercury pollution than S. alpinus. Further studies are urgently needed to determine whether the high sensitivity observed for T. zonatus to inorganic Hg is also present in the majority of tropical species or whether this species presents an isolated case.
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Affiliation(s)
- C A Oliveira Ribeiro
- Departamento de Biologia Celular, Universidade Federal do Paraná, Curitiba, PR, Brazil
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23
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Ferrières G, Cuny M, Simony-Lafontaine J, Jacquemier J, Rouleau C, Guilleux F, Grenier J, Rouanet P, Pujol H, Jeanteur P, Escot C. Variation of bcl-2 expression in breast ducts and lobules in relation to plasma progesterone levels: overexpression and absence of variation in fibroadenomas. J Pathol 1997; 183:204-11. [PMID: 9390034 DOI: 10.1002/(sici)1096-9896(199710)183:2<204::aid-path921>3.0.co;2-m] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Some women with benign breast disease eventually develop breast cancer. The mammary gland undergoes tissue remodelling according to hormonal influences, involving a balance between quiescence, proliferation, and mechanisms of cell death. Proliferation and/or apoptotic events could therefore be investigated to help understand the mechanisms of benign lesion formation and identify mastopathies with a poor prognosis. bcl-2 expression was analysed by immunohistochemistry in 75 benign mastopathies. Protein levels were quantitated with an image analyser in various epithelial structures on frozen sections, including adenoses, fibroadenomas, ductal epithelial hyperplasias, cysts, and apparently normal surrounding lobules and ducts. bcl-2 levels were equivalent in apparently normal lobules and ducts, as well as in cysts and ductal hyperplasias. bcl-2 staining was significantly higher in fibroadenomas, known to be of lobular origin [mean = 10.1, quantitative immunochemistry score (QIC) arbitrary units (AU), n = 19], than in normal lobules (mean = 5.1 AU, n = 43, P = 7 x 10(-5). bcl-2 levels in normal lobules and ducts varied according to the menstrual cycle, being higher during the follicular than the luteal phase (P = 1.8 x 10(-2) and P = 1.7 x 10(-2), respectively). This was further supported by a statistical link (P = 5 x 10(-3) between high levels of circulating progesterone and weak bcl-2 staining in lobules and ducts. This progesterone-dependent variation was absent in fibroadenomas. No statistical correlation was found between bcl-2 expression and circulating levels of oestradiol, and follicle-stimulating or luteotrophic hormones. Although these are only preliminary results, they suggest an influence of progesterone on bcl-2 expression which might be lost in fibroadenomas. A hypothesis is proposed concerning the potential involvement of altered regulation of the apoptotic process in the formation of such benign lesions.
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Affiliation(s)
- G Ferrières
- Laboratoire de Biologie Moléculaire Appliquée au Risque Oncogénétique, CRLC Val d'Aurelle-Paul Lamarque, Montpellier, France
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Rouleau C, Tjälve H, Gottofrey J, Pelletier E. Effects of some chelating agents on the uptake and distribution of 54Mn(II) in the brown trout (Salmo trutta). Pharmacol Toxicol 1994; 74:271-9. [PMID: 8090699 DOI: 10.1111/j.1600-0773.1994.tb01111.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The effects of humic acids, which are natural metal-complexing compounds, and potassium ethylxanthate, sodium diethyldithiophosphate, sodium dimethyldithiocarbamate, and sodium diethyldithiocarbamate, which are sulphur-containing man-made chelating agents, on the uptake and tissue distribution of 54Mn(II) were studied in brown trout (Salmo trutta). Fish were exposed for 7 days to 0.1 microgram Mn(II).l-1 as MnCl2 (1 microCi 54MN.l-1) with or without chelating agents. Examination of the partition of Mn between octanol and a Tris-HCl buffer in the presence of these compounds was also performed. Humic acids had only small effects on Mn uptake and distribution in trout, probably because of the low stability of Mn-humate complexes. Partition of Mn in the presence of potassium ethylxanthate, sodium diethyldithiophosphate, sodium dimethyldithiocarbamate, and sodium diethyldithiocarbamate between octanol and Tris-HCl buffer showed formation of lipophilic complex with the latter two compounds, but not with the former. However, these four chelating agents all decreased Mn uptake in the trout by 40-45%. These substances also changed the distribution of Mn within the fish, with a higher proportion of the metal being present in some visceral organs and a smaller proportion being localized in some non-parenchymateous tissues, such as skins, fins and bones. The mechanisms underlying these effects are not known. However, the interaction of chelating agents with the Mn, although weak, may have partially withdrawn the metal from the uptake process in the gills. The redistribution of Mn in the fish may be due to the binding of the metal to complexing compounds which have reached the intestinal lumen.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- C Rouleau
- University of Québec at Rimouski, Department of Oceanography, Canada
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25
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Dion YM, Katkhouda N, Rouleau C, Aucoin A. Laparoscopy-assisted aortobifemoral bypass. Surg Laparosc Endosc Percutan Tech 1993; 3:425-9. [PMID: 8261276] [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: 01/29/2023]
Abstract
Therapeutic laparoscopy has substantially simplified the postoperative course of patients suffering from hepatobiliary, gastric, or colonic disease. One important advantage of this modality is the decrease in postoperative pain, which diminishes the potential for cardiopulmonary problems. Patients with aortoiliac atherosclerotic disease are at high risk for postoperative complications, and a minimally invasive procedure may favorably affect their postoperative recovery. We describe here the first patient on whom we performed a laparoscopy-assisted aortobifemoral bypass. Under the pneumoperitoneum, seven 10-mm trocars were inserted to permit aortic dissection and creation of retroperitoneal tunnels to the femoral regions. After evacuation of the pneumoperitoneum, an 8-cm midline incision was made to allow a side-to-end aortic anastomosis. The patient's postoperative period was uncomplicated by any cardiopulmonary problems despite his history of three myocardial infarctions; the patient had minimal pain that allowed for a quick return to ambulation. This procedure is minimally invasive and appeared to simplify the postoperative period in our patient. It could become the procedure of choice for certain patients with aortoiliac disease.
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Affiliation(s)
- Y M Dion
- Department of Surgery, St-François d'Assise Hospital, Québec City, Canada
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Formichi MJ, Guidoin RG, Jausseran JM, Awad JA, Johnston KW, King MW, Eng P, Courbier R, Marois M, Rouleau C. Expanded PTFE prostheses as arterial substitutes in humans: late pathological findings in 73 excised grafts. Ann Vasc Surg 1988; 2:14-27. [PMID: 3228535 DOI: 10.1016/s0890-5096(06)60773-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.1] [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: 01/04/2023]
Abstract
Through collaboration of surgeons, pathologists and bioengineers at five centers in Canada and France, this study analyzed the late pathology and structural changes in 73 expanded PTFE arterial prostheses harvested from patients at autopsies and reoperations. The degree of tissue encapsulation increased with the duration of implantation but was reduced by the presence of infection. In several cases, the fibrous tissue penetrated the wall of the prosthesis and partitioned off the thin outer layer, thus disrupting the delicate microporous structure of the wall. The presence of aneurysms was observed in models that had no external reinforcing layer and among grafts that apparently suffered from surgical trauma. Wrinkling of grafts was noted at areas of flexion and was often associated with thickening of the external capsule and reduced luminal diameters. Endothelialization was found within only a few millimeters of the anastomoses. The luminal surfaces were generally not well healed. The PTFE structure was usually readily visible under a thin covering of loosely adhering thrombotic deposits. Bacteria were observed in 46% of the cases, even though only 29% were considered clinically infected. The incidence of lipid or cholesterol deposits was high. Avoiding iatrogenic trauma to the external wall of the prosthesis during implantation is important. Those features where design improvements are required to provide longer term structural integrity and dimensional stability in future models of expanded PTFE prostheses should be identified.
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Affiliation(s)
- M J Formichi
- Laboratoire d'Analyses Fonctionnelles, Hôpital St-François d'Assise, Québec, PQ, Canada
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Guidoin R, Gosselin C, Domurado D, Marois M, Levaillant PA, Awad J, Rouleau C, Levasseur L. Dacron as arterial prosthetic material: nature, properties, brands, fate and perspectives. Biomater Med Devices Artif Organs 1977; 5:177-203. [PMID: 141954 DOI: 10.3109/10731197709118672] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Dacron graft prostheses are routinely implanted to overcome impairment of arterial flow to distal tissues. Many different fabric configurations have been developped and evaluated. Unfortunately, after implantation the flow surface of any graft persists as a fibrinous lining. No human specimen has a commonly ingrown extension of tissue exceeding some millimeters in length. Full wall healing and endothelialization of arterial prosthesis is a goal that must be pursued intensively because it seems that the goal is attainable.
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Guidoin RG, Gosselin C, Rouleau C, Haggis GH, Boulay J, Awad J. Preclotting of knitted Dacron prosthesis. A scanning electron microscope study. J Thorac Cardiovasc Surg 1975; 70:152-62. [PMID: 125367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A scanning electron microscope study of preclotting on knitted Dacron prosthesis is reported. Five steps of the interaction are well identified: (1) before any blood contact (virgin Dacron), (2) during the first 3 minutes (fibrin and platelet aggregates), (3) fifth minute of contact (clotting), (4) 15 minutes of contact with heparinized blood (thin fibrin network), and (5) the following minutes (invasion of fibrin, which enmeshes blood cells).
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Guidoin RG, Awad JA, Gosselin C, Rouleau C, Haggis GH. Preclotting and thrombosis of a dacron prosthesis. A scanning electron microscope study. Biomater Med Devices Artif Organs 1975; 3:365-82. [PMID: 129177 DOI: 10.3109/10731197509118631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The authors report eht study of preclotting made on a knitted Dacron prostheses before implantation into a patient. Within 24 h of implantation, clotting occurred. The patient had to be reoperated, and a second preclotting followed. Specimens were removed at different times and fixed in a Rembaum solution before being dried and studied by scanning electron microscopy.
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Guidoin RG, Gosselin C, Awad JA, Rouleau C, Haggis GH, Turcot J. [Morphology of the deposits formed during "preclotting" of dacron vascular prostheses. Scanning electron microscopy study]. Union Med Can 1974; 103:1374-81. [PMID: 4277238] [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: 01/09/2023]
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