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Falsi L, Macis S, Gelkop Y, Tartara L, Bonaventura E, Di Pietro P, Perucchi A, Garcia Y, Perepelitsa G, DelRe E, Agranat AJ, Lupi S. Anomalous Optical Properties of KTN:Li Ferroelectric Supercrystals. Nanomaterials (Basel) 2023; 13:899. [PMID: 36903777 PMCID: PMC10005727 DOI: 10.3390/nano13050899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/10/2023] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
We report a spectroscopic investigation of potassium-lithium-tantalate-niobate (KTN:Li) across its room-temperature ferroelectric phase transition, when the sample manifests a supercrystal phase. Reflection and transmission results indicate an unexpected temperature-dependent enhancement of average index of refraction from 450 nm to 1100 nm, with no appreciable accompanying increase in absorption. Second-harmonic generation and phase-contrast imaging indicate that the enhancement is correlated to ferroelectric domains and highly localized at the supercrystal lattice sites. Implementing a two-component effective medium model, the response of each lattice site is found to be compatible with giant broadband refraction.
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Affiliation(s)
- Ludovica Falsi
- Dipartimento di Fisica, Università di Roma “La Sapienza”, 00185 Rome, Italy
| | - Salvatore Macis
- Dipartimento di Fisica, Università di Roma “La Sapienza”, 00185 Rome, Italy
| | - Yehonatan Gelkop
- The Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Luca Tartara
- Dipartimento di Ingegneria Industriale e dell’Informazione, Università di Pavia, 27100 Pavia, Italy
| | | | - Paola Di Pietro
- Elettra—Sincrotrone Trieste S.C.p.A. S.S.14, Km 163.5 in AREA Science Park IT-34149 Basovizza, 34100 Trieste, Italy
| | - Andrea Perucchi
- Elettra—Sincrotrone Trieste S.C.p.A. S.S.14, Km 163.5 in AREA Science Park IT-34149 Basovizza, 34100 Trieste, Italy
| | - Yehudit Garcia
- The Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Galina Perepelitsa
- The Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Eugenio DelRe
- Dipartimento di Fisica, Università di Roma “La Sapienza”, 00185 Rome, Italy
- ISC-CNR, Università di Roma “La Sapienza”, 00185 Rome, Italy
| | - Aharon J. Agranat
- The Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Stefano Lupi
- Dipartimento di Fisica, Università di Roma “La Sapienza”, 00185 Rome, Italy
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Riley E, Garcia Y, Brew EA, Van DA, Engel LS, Imsais W. Primary adrenal insufficiency in a 56-year-old patient with well-controlled HIV. Am J Med Sci 2023. [DOI: 10.1016/s0002-9629(23)00145-3] [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: 01/28/2023]
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Xin F, Falsi L, Pierangeli D, Fusella F, Perepelitsa G, Garcia Y, Agranat AJ, DelRe E. Intense Wave Formation from Multiple Soliton Fusion and the Role of Extra Dimensions. Phys Rev Lett 2022; 129:043901. [PMID: 35939016 DOI: 10.1103/physrevlett.129.043901] [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: 02/14/2022] [Revised: 05/02/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
We experimentally and numerically explore the role of dimensionality in multiple (three or more) soliton fusion supported by nonreciprocal energy exchange. Three-soliton fusion into an intense wave is found when an extra dimension, with no broken inversion symmetry, is involved. The phenomenon is observed for 2+1D spatial waves in photorefractive crystals, where solitons are supported by a spatially local saturated Kerr-like self-focusing and fusion is driven by the leading nonlocal correction, the spatial analog of the nonlinear Raman effect.
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Affiliation(s)
- Feifei Xin
- Dipartimento di Fisica, Università di Roma "La Sapienza," 00185 Rome, Italy
- College of Physics and Materials Science, Tianjin Normal University, 300387, Tianjin, China
| | - Ludovica Falsi
- Dipartimento di Fisica, Università di Roma "La Sapienza," 00185 Rome, Italy
| | - Davide Pierangeli
- Dipartimento di Fisica, Università di Roma "La Sapienza," 00185 Rome, Italy
- ISC-CNR, Università di Roma "La Sapienza," 00185 Rome, Italy
| | - Fabrizio Fusella
- Dipartimento di Fisica, Università di Roma "La Sapienza," 00185 Rome, Italy
| | - Galina Perepelitsa
- The Brojde Center for Innovative Engineering and Computer Science, The Hebrew University, Jerusalem 91904, Israel
| | - Yehudit Garcia
- The Brojde Center for Innovative Engineering and Computer Science, The Hebrew University, Jerusalem 91904, Israel
| | - Aharon J Agranat
- The Brojde Center for Innovative Engineering and Computer Science, The Hebrew University, Jerusalem 91904, Israel
| | - Eugenio DelRe
- Dipartimento di Fisica, Università di Roma "La Sapienza," 00185 Rome, Italy
- ISC-CNR, Università di Roma "La Sapienza," 00185 Rome, Italy
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Noach S, Nahear R, Vidal Y, Garcia Y, Agranat AJ. Electro-optic active Q-switched Tm:YLF laser based on polarization modulation. Opt Lett 2021; 46:1971-1974. [PMID: 33857119 DOI: 10.1364/ol.422308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 03/22/2021] [Indexed: 06/12/2023]
Abstract
An electro-optic active Q-switched Tm:YLF laser (1880 nm) employing a novel, to the best of our knowledge, switching scheme is presented. The switching is done by a potassium lithium tantalate niobate (KLTN) crystal operated slightly above the ferroelectric phase transition, cut in a trapezoidal shape for reducing acousto-optic oscillations. The novel switching scheme exploits the emission cross section difference between the π and σ polarizations in the Tm:YLF and overcomes the residual oscillation effects even at high repetition rates. The laser exhibited stable operation yielding pulses of 0.81 mJ and pulse duration of 30 ns at 5 kHz, and pulses of 1.25 mJ and pulse duration of 19 ns at 500 Hz.
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Agranat AJ, Kabessa Y, Shemer B, Shpigel E, Schwartsglass O, Atamneh L, Uziel Y, Ejzenberg M, Mizrachi Y, Garcia Y, Perepelitsa G, Belkin S. An autonomous bioluminescent bacterial biosensor module for outdoor sensor networks, and its application for the detection of buried explosives. Biosens Bioelectron 2021; 185:113253. [PMID: 33930754 DOI: 10.1016/j.bios.2021.113253] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/26/2021] [Accepted: 04/12/2021] [Indexed: 11/19/2022]
Abstract
We describe a miniaturized field-deployable biosensor module, designed to function as an element in a sensor network for standoff monitoring and mapping of environmental hazards. The module harbors live bacterial sensor cells, genetically engineered to emit a bioluminescent signal in the presence of preselected target materials, which act as its core sensing elements. The module, which detects and processes the biological signal, composes a digital record that describes its findings, and can be transmitted to a remote receiver. The module is an autonomous self-contained unit that can function either as a standalone sensor, or as a node in a sensor network. The biosensor module can potentially be used for detecting any target material to which the sensor cells were engineered to respond. The module described herein was constructed to detect the presence of buried landmines underneath its footprint. The demonstrated detection sensitivity was 0.25 mg 2,4-dinitrotoluene per Kg soil.
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Affiliation(s)
- Aharon J Agranat
- Department of Applied Physics and the Brojde Center for Innovative Engineering and Computer Science, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Yossef Kabessa
- Department of Applied Physics and the Brojde Center for Innovative Engineering and Computer Science, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel.
| | - Benjamin Shemer
- Department of Plant & Environmental Sciences, Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Etai Shpigel
- Department of Plant & Environmental Sciences, Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Offer Schwartsglass
- Department of Applied Physics and the Brojde Center for Innovative Engineering and Computer Science, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Loay Atamneh
- Department of Applied Physics and the Brojde Center for Innovative Engineering and Computer Science, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Yonatan Uziel
- Department of Applied Physics and the Brojde Center for Innovative Engineering and Computer Science, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Meir Ejzenberg
- Department of Applied Physics and the Brojde Center for Innovative Engineering and Computer Science, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Yosef Mizrachi
- Department of Applied Physics and the Brojde Center for Innovative Engineering and Computer Science, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Yehudit Garcia
- Department of Applied Physics and the Brojde Center for Innovative Engineering and Computer Science, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Galina Perepelitsa
- Department of Applied Physics and the Brojde Center for Innovative Engineering and Computer Science, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Shimshon Belkin
- Department of Plant & Environmental Sciences, Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
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Cardenas D, Díaz G, Cadavid Sierra J, Lipovestky F, Canicoba M, Duarte Vera Y, Gutierrez Reyes J, Sanchez P, Maza C, Calvo I, Garcia Y, Jimenez M, Arenas H, Bermúdez C. Nutrition education in Latin-American medical schools: Results of an international survey. Clin Nutr ESPEN 2020. [DOI: 10.1016/j.clnesp.2020.09.257] [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: 11/16/2022]
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Mayoral M, Castañer E, Gallardo X, Andreu M, Dalmau E, Garcia Y. Tumour pseudoprogression during nivolumab immunotherapy for lung cancer. Radiología (English Edition) 2019. [DOI: 10.1016/j.rxeng.2019.08.001] [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: 10/25/2022]
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Patino-Carvajal H, Tibiriçá L, Garcia Y, Maresco A, Tourgeman I. Review of Emotional Intelligence: A Preliminary Map Across Latin America. Arch Clin Neuropsychol 2019. [DOI: 10.1093/arclin/acz029.38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Objective
The purpose of this study was to investigate the prevalence of Emotional Intelligence (EI) research among 19 Latin American countries.
Participants and Method
Respective to each country, Total Life Science publications and Psychology publications were gathered from “UNESCO Science Report Towards 2030.” Population and GDP statistics pertaining to each country were derived from CIA Factbook. Mean education and percentage of GDP allocated for education were gathered from UNESCO Institute for Statistics. The databases SciELO and Redalyc were used to exhume the number of published Emotional Intelligence articles. The term “inteligencia emocional” was used. Findings were filtered to meet inclusion criteria: peer-reviewed, published between 2008-2018, corresponding to a Psychology related subject. Duplicate articles, those that did not contain the term “inteligencia emocional” in the abstract and articles that were not listed under the Psychology category were excluded.
Results
Data analysis of 19 countries from 2008-2014 revealed the mean number of Emotional Intelligence published articles to be 2.65 (SD = 5.54) articles per country - with a maximum of 22 and a minimum of 0. The percent of articles featuring EI in relation to Total Psychology articles published had a mean of 7% - with Minimum of 0% and Maximum of 60%. Bolivia has the highest percentage of articles on EI (60%), whereas Colombia the highest total number of articles published (n = 41). Population was significantly correlated with Total Articles Published and Total Psychology Articles Published.
Conclusions
Emotional Intelligence in Latin American countries is not widely investigated. Findings revealed 12 out of 19 Latin American countries had one or more publications related to Emotional Intelligence. While population was shown to be related to the number of articles published in Life Sciences and Psychology, it did not reveal a correlation with the publication of studies regarding EI. Furthermore, education and GDP were not related to the overall publication of articles.
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Majem Tarruella M, Campillo J, Grau Béjar J, Carcereny E, Bernabe Caro R, Garcia Y, Artal-Cortes A, González Cao M, Lianes P, Paredes Lario A, Sereno Moyano M, Mielgo Rubio X, Macias J, Provencio Pulla M, Rodriguez-Abreu D. GECP 1605/NIVEX TRIAL nivolumab in the real world: The SPANISH expanded access program experience in pretreated advanced NSCLC. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy292.090] [Citation(s) in RCA: 1] [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: 11/12/2022] Open
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Ruffinelli J, Pardo J, Recalde S, Benítez J, Cancel L, Palmero R, Llatjós R, Escoda M, Padrones S, Brao I, Dalmau E, Garcia Y, Cardenal F, Nadal E. Baseline hyperglycemia was predictive of poor outcome in pleural malignant mesothelioma. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx389.006] [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: 11/13/2022] Open
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Sablot D, Gaillard N, Colas C, Smadja P, Gely C, Dutray A, Bonnec JM, Jurici S, Farouil G, Ferraro-Allou A, Jantac M, Allou T, Pujol C, Olivier N, Laverdure A, Fadat B, Mas J, Dumitrana A, Garcia Y, Touzani H, Perucho P, Moulin T, Richard C, Heroum C, Bouly S, Sagnes-Raffy C, Heve D. Results of a 1-year quality-improvement process to reduce door-to-needle time in acute ischemic stroke with MRI screening. Rev Neurol (Paris) 2017; 173:47-54. [PMID: 28131535 DOI: 10.1016/j.neurol.2016.12.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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: 07/01/2016] [Revised: 09/20/2016] [Accepted: 12/20/2016] [Indexed: 01/19/2023]
Abstract
OBJECTIVE To determine the effects of a 1-year quality-improvement (QI) process to reduce door-to-needle (DTN) time in a secondary general hospital in which multimodal MRI screening is used before tissue plasminogen activator (tPA) administration in patients with acute ischemic stroke (AIS). METHODS The QI process was initiated in January 2015. Patients who received intravenous (iv) tPA<4.5h after AIS onset between 26 February 2015 to 25 February 2016 (during implementation of the QI process; the "2015 cohort") were identified (n=130), and their demographic and clinical characteristics and timing metrics compared with those of patients treated by iv tPA in 2014 (the "2014 cohort", n=135). RESULTS Of the 130 patients in the 2015 cohort, 120 (92.3%) of them were screened by MRI. The median DTN time was significantly reduced by 30% (from 84min in 2014 to 59min; P<0.003), while the proportion of treated patients with a DTN time≤60min increased from 21% to 52% (P<0.0001). Demographic and baseline characteristics did not significantly differ between cohorts, and the improvement in DTN time was associated with better outcomes after discharge (patients with a 0-2 score on the modified rankin scale: 59% in the 2015 cohort vs 42.4% in the 2014 cohort; P<0.01). During the 1-year QI process, the median DTN time decreased by 15% (from 65min in the first trimester to 55min in the last trimester; P≤0.04) with a non-significant 1.5-fold increase in the proportion of treated patients with a DTN time≤60min (from 41% to 62%; P=0.09). CONCLUSION It is feasible to deliver tPA to patients with AIS within 60min in a general hospital, using MRI as the routine screening modality, making this QI process to reduce DTN time widely applicable to other secondary general hospitals.
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Affiliation(s)
- D Sablot
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France; Agence régionale de santé Languedoc-Roussillon et Midi-Pyrénées (ARS-LRMP), 28, parc club du Millénaire, 1025, avenue Henri-Becquerel, 34067 Montpellier, France.
| | - N Gaillard
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - C Colas
- Service d'accueil des urgences/SMUR 66, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - P Smadja
- Service de radiologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - C Gely
- Service d'accueil des urgences/SMUR 66, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - A Dutray
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - J-M Bonnec
- Service d'accueil des urgences/SMUR 66, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - S Jurici
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - G Farouil
- Service de radiologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - A Ferraro-Allou
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - M Jantac
- Service d'accueil des urgences/SMUR 66, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - T Allou
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - C Pujol
- Service d'accueil des urgences/SMUR 66, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - N Olivier
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - A Laverdure
- Service d'accueil des urgences/SMUR 66, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - B Fadat
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - J Mas
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - A Dumitrana
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - Y Garcia
- Service d'accueil des urgences/SMUR 66, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - H Touzani
- Service de neurologie, centre hospitalier, boulevard Dr-Lacroix, 11100 Narbonne, France
| | - P Perucho
- Service de la qualité, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - T Moulin
- Service de neurologie, CHU Minjoz, 3, boulevard A-Flemming, 25030 Besançon, France
| | - C Richard
- Agence régionale de santé Languedoc-Roussillon et Midi-Pyrénées (ARS-LRMP), 28, parc club du Millénaire, 1025, avenue Henri-Becquerel, 34067 Montpellier, France
| | - C Heroum
- Agence régionale de santé Languedoc-Roussillon et Midi-Pyrénées (ARS-LRMP), 28, parc club du Millénaire, 1025, avenue Henri-Becquerel, 34067 Montpellier, France
| | - S Bouly
- Agence régionale de santé Languedoc-Roussillon et Midi-Pyrénées (ARS-LRMP), 28, parc club du Millénaire, 1025, avenue Henri-Becquerel, 34067 Montpellier, France
| | - C Sagnes-Raffy
- Agence régionale de santé Languedoc-Roussillon et Midi-Pyrénées (ARS-LRMP), 28, parc club du Millénaire, 1025, avenue Henri-Becquerel, 34067 Montpellier, France
| | - D Heve
- Agence régionale de santé Languedoc-Roussillon et Midi-Pyrénées (ARS-LRMP), 28, parc club du Millénaire, 1025, avenue Henri-Becquerel, 34067 Montpellier, France
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Salobrar-Garcia E, Garcia Y, Lostao C, Jañez L, de Hoz R, Rojas B, Salazar J, Ramirez A, Gil P, Yubero R, Triviño A, Ramirez J. Maculopapillary analysis in the posterior pole in patients with mild Alzheimer's disease. Acta Ophthalmol 2016. [DOI: 10.1111/j.1755-3768.2016.0372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Remon J, Reguart N, Garcia Y, Nadal E, Lopez-castro R, Garcia-campelo R, Martin-martorell P, Juan O, Olmedo E, Trancho F, Domine M, Ponce S, Cumplido D, Majem M, Massuti B, Porta R, Rodriguez-abreu D, Provencio M. 3074 Platinum-pemetrexed palliative chemotherapy in malignant pleural mesothelioma from Spanish BEMME database The Spanish Lung Cancer Group (SLCG). Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31715-4] [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: 10/22/2022]
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Villarreal IM, Pinilla M, Salas I, Garcia Y, López-Cortijo C. Respiratory epithelial adenomatoid hamartoma: A very rare entity originating from the lateral nasal wall. Eur Ann Otorhinolaryngol Head Neck Dis 2015; 132:369-70. [PMID: 26338515 DOI: 10.1016/j.anorl.2015.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- I M Villarreal
- ENT Department, Hospital Universitario Puerta de Hierro-Majadahonda, Universidad Autónoma de Madrid, Calle Joaquín Rodrigo 2, Majadahonda, 28222 Madrid, Spain.
| | - M Pinilla
- ENT Department, Hospital Universitario Puerta de Hierro-Majadahonda, Universidad Autónoma de Madrid, Calle Joaquín Rodrigo 2, Majadahonda, 28222 Madrid, Spain
| | - I Salas
- Pathology Department, Hospital Universitario Puerta de Hierro-Majadahonda, Universidad Autónoma de Madrid, Calle Joaquín Rodrigo 2, Majadahonda, 28222 Madrid, Spain
| | - Y Garcia
- Radiology Department, Hospital Universitario Puerta de Hierro-Majadahonda, Universidad Autónoma de Madrid, Calle Joaquín Rodrigo 2, Majadahonda, 28222 Madrid, Spain
| | - C López-Cortijo
- ENT Department, Hospital Universitario Puerta de Hierro-Majadahonda, Universidad Autónoma de Madrid, Calle Joaquín Rodrigo 2, Majadahonda, 28222 Madrid, Spain
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Rodríguez-Muguruza S, Mateo L, Sanint J, Prior A, Garcia Y, Riveros-Frutos A, Holgado S, Martínez-Morillo M, Olivé A, Tena X. THU0565 Immunoglobulin a Nephropathy in Rheumatic Conditions. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.2772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Jacquemin PL, Robert F, Tinant B, Garcia Y. trans-Keto* form emission in non-photochromic N-salicylidene aminomethylpyridines: a structural study. Acta Crystallogr A 2012. [DOI: 10.1107/s0108767312095062] [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: 11/10/2022] Open
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Jacquemin PL, Robeyns K, Marchand-Brynaert J, Devillers M, Garcia Y. Understanding hybrid polymeric materials with N-salicylidene aniline derivatives: a structural approach. Acta Crystallogr A 2012. [DOI: 10.1107/s0108767312095074] [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: 11/10/2022] Open
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Monne JS, Gallardo E, Blanco R, Bastús R, Mesía R, Montesinos J, Macià M, Cambra M, Oliva J, Garcia Y. EP-1221 RESULTS OF CONCURRENT HYPERFRACTIONATED CHEMO-RADIOTHERAPY IN LIMITED SMALL-CELL LUNG CANCER (LD-SCLC). Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)71554-2] [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: 10/28/2022]
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Rubio M, Santaballa A, Garcia Y, Gonzalez A, Bover I, Calvo E, Contreras JA, del Campo J, De Juan A, Poveda A. Phase II study of weekly topotecan in recurrent or metastatic cervical cancer: a GEICO study. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.5591] [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: 11/20/2022] Open
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Garcia Y, Collighan R, Griffin M, Pandit A. Assessment of cell viability in a three-dimensional enzymatically cross-linked collagen scaffold. J Mater Sci Mater Med 2007; 18:1991-2001. [PMID: 17554605 DOI: 10.1007/s10856-007-3091-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2005] [Accepted: 06/12/2006] [Indexed: 05/15/2023]
Abstract
Microbial transglutaminase (mTGase) is an enzyme that introduces a covalent bond between peptide bound glutamine and lysine residues. Proteins cross-linked in this manner are often more resistant to proteolytic degradation and show increased tensile strength. This study evaluates the effects of mTGase mediated cross-linking of collagen on the cellular morphology, behaviour and viability of murine 3T3 fibroblasts following their seeding into collagen scaffolds. Additionally, cell mediated scaffold contraction, porosity and level of cross-linking of the scaffold has been analysed using image analysis software, scanning electron microscopy (SEM), colorimetric assays, and Fourier transform infrared spectroscopy (FTIR). We demonstrate that the biocompatibility and cellular morphology, when comparing cultures of fibroblasts integrated in mTGase cross-linked collagen scaffolds with the native collagen counterparts, remained unaffected. It has been also elicited that the structural characteristics of collagen have been preserved while introducing enzymatically resistant covalent bonds.
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Affiliation(s)
- Y Garcia
- National Centre for Biomedical Engineering Science, National University of Ireland, Galway, Ireland.
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Tinant B, De Crom N, Garcia Y. Spin crossover and supramolecular organization of a new family of iron (II) dinuclear complexes. Acta Crystallogr A 2007. [DOI: 10.1107/s0108767307096535] [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: 11/10/2022] Open
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Sablot D, Cassarini JF, Akouz A, Benejean JM, Leibinger F, Faillie X, Vidry E, Ayrignac X, Castro S, Sinaya L, Bertrand JL, Garcia Y, Arnoud B, Negre C. Utilisation du rt-PA intraveineux dans l’ischémie cérébrale en Centre Hospitalier Général : l’expérience de l’Hôpital Saint-Jean de Perpignan. Rev Neurol (Paris) 2006; 162:1109-17. [PMID: 17086147 DOI: 10.1016/s0035-3787(06)75123-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Intravenous recombinant tissue plasminogen activator (rt-PA) has approval for use despite of its authorization for treatment of ischemic stroke within the 3-hour time window in 2003, is rarely used in community hospital (CH). It therefore remains questionable if the positive results of the key studies conducted in specialized centers may be extended to community hospitals less specialized in the management of stroke. METHODS We report the results of an observational cohort study including 39 patients treated with intravenous rt-Pa (according to the NINDS rt-PA stroke trail treatment protocol) at St Jean Hospital (Perpignan, France) between March 1, 2002 and August 31, 2005. Results are compared to those of the treated arm of the NINDS study. RESULTS 1.2p.cent of ischemic stroke were treated with intravenous rt-Pa. Results are similar to those of the NINDS study: The outcome was favorable (modified Rankin score (mRS) with 0 or 1) for 44p.cent of the patients (as compared to 39p.cent in the NINDS study (X2 = 0.34; p = 0.5)) and there was no significant difference in term of death or outcome as assessed by mRS at 3 months (X2 = 0.09; p = 0.75 and X2 = 0.77; p = 0.75, respectively). No symptomatic hemmorrhagic transformation related to the use of rt-Pa was observed. CONCLUSION Our results indicate that rt-PA therapy for ischemic stroke may be as safe and effective in the setting of a community hospital as it is in specialized centers.
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Affiliation(s)
- D Sablot
- Service de Neurologie, Hôpital Saint-Jean, Perpignan.
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Boland Y, Tinant B, Attout A, Garcia Y. Stuctures of iron(II) and copper(II) coordination polymers with α,ω-bis(tetrazol-1-yl)di(ethylene glycol). Acta Crystallogr A 2006. [DOI: 10.1107/s010876730609845x] [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: 11/10/2022] Open
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Garcia Y. Tuning cooperative effects in azole based iron(II) spin crossover coordination polymers. Acta Crystallogr A 2006. [DOI: 10.1107/s0108767306097844] [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: 11/10/2022] Open
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Dîrtu MM, Garcia Y, Tinant B. Structures of new Cu(II) and Co(II) 4-amino-1,2,4-triazole coordination compounds. Acta Crystallogr A 2006. [DOI: 10.1107/s0108767306094517] [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: 11/10/2022] Open
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Gieck C, Garcia Y. [Co(bppz) 2](ClO 4) 2·MeOH: a new 2,6-bis(pyrazol-1-yl)pyrazine complex. Acta Crystallogr A 2006. [DOI: 10.1107/s0108767306094475] [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: 11/11/2022] Open
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Garcia Y, Gieck C, Bravic G, Chasseau D. Supramolecular interactions in the 2-D coordination polymers: [ M(btre) 2(NCS) 2] ( MII= Fe, Co). Acta Crystallogr A 2006. [DOI: 10.1107/s0108767306094487] [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: 11/10/2022] Open
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Garcia Y, Ksenofontov V, Campbell SJ, Lord JS, Boland Y, Gütlich P. Muon Spin Relaxation Study of the Spin Transition Compound [Fe(Phen)2(NCS)2]. J Phys Chem B 2004. [DOI: 10.1021/jp046695y] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Y. Garcia
- Unité de Chimie des Matériaux Inorganiques et Organiques, Département de Chimie, Faculté des Sciences, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium, Institut für Anorganische Chemie und Analytische Chemie, Universität Mainz, 55099 Mainz, Germany, School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600, Australia, and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot,
| | - V. Ksenofontov
- Unité de Chimie des Matériaux Inorganiques et Organiques, Département de Chimie, Faculté des Sciences, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium, Institut für Anorganische Chemie und Analytische Chemie, Universität Mainz, 55099 Mainz, Germany, School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600, Australia, and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot,
| | - S. J. Campbell
- Unité de Chimie des Matériaux Inorganiques et Organiques, Département de Chimie, Faculté des Sciences, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium, Institut für Anorganische Chemie und Analytische Chemie, Universität Mainz, 55099 Mainz, Germany, School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600, Australia, and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot,
| | - J. S. Lord
- Unité de Chimie des Matériaux Inorganiques et Organiques, Département de Chimie, Faculté des Sciences, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium, Institut für Anorganische Chemie und Analytische Chemie, Universität Mainz, 55099 Mainz, Germany, School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600, Australia, and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot,
| | - Y. Boland
- Unité de Chimie des Matériaux Inorganiques et Organiques, Département de Chimie, Faculté des Sciences, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium, Institut für Anorganische Chemie und Analytische Chemie, Universität Mainz, 55099 Mainz, Germany, School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600, Australia, and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot,
| | - P. Gütlich
- Unité de Chimie des Matériaux Inorganiques et Organiques, Département de Chimie, Faculté des Sciences, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium, Institut für Anorganische Chemie und Analytische Chemie, Universität Mainz, 55099 Mainz, Germany, School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600, Australia, and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot,
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Campbell SJ, Ksenofontov V, Garcia Y, Lord JS, Boland Y, Gütlich P. Muon Spin Rotation and Mössbauer Investigations of the Spin Transition in [Fe(ptz)6](ClO4)2. J Phys Chem B 2003. [DOI: 10.1021/jp036078u] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. J. Campbell
- Institut für Anorganische Chemie und Analytische Chemie, Universität Mainz, 55099 Mainz, Germany, School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600, Australia, Unité de Chimie des Matériaux Inorganiques et Organiques, Département de Chimie, Faculté des Sciences, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium, and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot,
| | - V. Ksenofontov
- Institut für Anorganische Chemie und Analytische Chemie, Universität Mainz, 55099 Mainz, Germany, School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600, Australia, Unité de Chimie des Matériaux Inorganiques et Organiques, Département de Chimie, Faculté des Sciences, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium, and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot,
| | - Y. Garcia
- Institut für Anorganische Chemie und Analytische Chemie, Universität Mainz, 55099 Mainz, Germany, School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600, Australia, Unité de Chimie des Matériaux Inorganiques et Organiques, Département de Chimie, Faculté des Sciences, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium, and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot,
| | - J. S. Lord
- Institut für Anorganische Chemie und Analytische Chemie, Universität Mainz, 55099 Mainz, Germany, School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600, Australia, Unité de Chimie des Matériaux Inorganiques et Organiques, Département de Chimie, Faculté des Sciences, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium, and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot,
| | - Y. Boland
- Institut für Anorganische Chemie und Analytische Chemie, Universität Mainz, 55099 Mainz, Germany, School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600, Australia, Unité de Chimie des Matériaux Inorganiques et Organiques, Département de Chimie, Faculté des Sciences, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium, and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot,
| | - P. Gütlich
- Institut für Anorganische Chemie und Analytische Chemie, Universität Mainz, 55099 Mainz, Germany, School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600, Australia, Unité de Chimie des Matériaux Inorganiques et Organiques, Département de Chimie, Faculté des Sciences, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium, and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot,
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Levchenko G, Ksenofontov V, Stupakov A, Spiering H, Garcia Y, Gütlich P. Pressure effect on temperature induced high-spin–low-spin phase transitions. Chem Phys 2002. [DOI: 10.1016/s0301-0104(01)00707-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [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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Michalowicz A, Moscovici J, Charton J, Sandid F, Benamrane F, Garcia Y. EXAFS and thermodynamics of Fe(II) spin transition polymeric compounds. J Synchrotron Radiat 2001; 8:701-703. [PMID: 11512901 DOI: 10.1107/s0909049500018057] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2000] [Accepted: 11/20/2000] [Indexed: 05/23/2023]
Abstract
We have studied the temperature variations of the EXAFS spectra of three Fe(II)/triazole-based spin transition polymeric compounds compared to a monomer belonging to the same family. These compounds have various temperatures of transition and hysteresis loop widths. In the three polymers, the Fe-Fe-Fe alignment, detected by a multiple scattering signal at the double Fe-Fe distance, is preserved through the spin transition. For the four compounds, we have studied the variations versus temperature of the Debye-Waller factors for both FeN6 (first shell) and Fe-Fe-Fe (multiple scattering path, only for the polymers). We report a strong increase of (sigma2(FeN6) through the spin transition for the monomer and two of the polymeric species. For the polymers an increase of sigma2(Fe-Fe-Fe) is also observed. These observations confirm the results available in the literature, and we confirm the interpretation as an increase of the vibrational part of the DW. For one particular polymer, we observe an unexpected behaviour: no significant increase of the Debye-Waller factor from low spin to high spin states. The EXAFS study of these non mono-crystalline species is the only way to discuss the local structure-thermodynamics properties relationships, and particularly the so-called cooperative effect in the spin transition process.
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Affiliation(s)
- A Michalowicz
- GPMD, Université Paris XII-Val de Marne, Créteil, France.
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van Koningsbruggen PJ, Garcia Y, Kahn O, Fournès L, Kooijman H, Spek AL, Haasnoot JG, Moscovici J, Provost K, Michalowicz A, Renz F, Gütlich P. Synthesis, crystal structure, EXAFS, and magnetic properties of catena [mu-tris(1,2-bis(tetrazol-1-yl)propane-N1,N1')iron(II)] bis(perchlorate). First crystal structure of an iron(II) spin-crossover chain compound. Inorg Chem 2000; 39:1891-900. [PMID: 11428109 DOI: 10.1021/ic991118n] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[Fe(btzp)3](ClO4)2 (btzp = 1,2-bis(tetrazol-1-yl)propane) represents the first structurally characterized Fe(II) linear chain compound exhibiting thermal spin crossover. It shows a very gradual spin transition (T1/2 = 130 K) which has been followed by magnetic susceptibility measurements and 57Fe Mössbauer spectroscopy. The structure has been solved at 200 and 100 K by single-crystal X-ray analysis. It crystallizes in the trigonal space group P3c1 with Z = 2 Fe(II) units at both temperatures. The molecular structure consists of chains running along the c axis in which the Fe(II) ions are linked by three N4,N4' coordinating bis(tetrazole) ligands. The main difference between the two forms appears to be in the Fe-N bond lengths, which are 2.164(4) A at 200 K and 2.038(4) A at 100 K. The Fe-Fe separations are 7.422(1) A at 200 K and 7.273(1) A at 100 K. The EXAFS results are consistent with the crystal structure. In both spin states, the FeN6 octahedron is almost regular within the EXAFS resolution. The Fe-N distance is found as 2.16(2) A at 300 K and 2.00(2) A at 40 K. The absence of the "7 A peak" in the EXAFS spectra of [Fe(btzp)3](ClO4)2, in contrast with what has been observed for the [Fe(4-R-1,2,4-triazole)3]-(anion)2 chain compounds, confirms that this peak can be used as the signature of a metal alignment only when it involves a strongly enhanced multiple scattering M-M-M path, with M-M spacing less than 4 A. Irradiation with green light at 5 K has led to the population of the metastable high-spin state for the iron(II) ion. The nature of the spin-crossover behavior has been discussed on the basis of the structural features.
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Affiliation(s)
- P J van Koningsbruggen
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg University, Staudingerweg 9, D-55099 Mainz, Germany
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Cruz LJ, Quintana D, Iglesias E, Garcia Y, Huerta V, Garay HE, Duarte C, Reyes O. Immunogenicity comparison of a multi-antigenic peptide bearing V3 sequences of the human immunodeficiency virus type 1 with TAB9 protein in mice. J Pept Sci 2000; 6:217-24. [PMID: 10823490 DOI: 10.1002/(sici)1099-1387(200005)6:5<217::aid-psc242>3.0.co;2-u] [Citation(s) in RCA: 10] [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: 11/09/2022]
Abstract
The multiple antigenic peptide system (MAP) has been proposed as a novel and valuable approach for eliciting antibodies for peptides and developing synthetic vaccines. Multi-epitope polypeptides (MEP) have also been developed as an alternative to the recombinant approach for vaccines. The V3 loop from the HIV type 1 (HIV-1) external glycoprotein (gp120) contains the principal neutralization domain (PND). Antibodies against this region neutralize HIV-1 in vitro and in vivo. In this work, a novel presentation of di-epitope MAP was synthesized. A monomeric MAP carrying two identical JY1 V3 sequences as B-cell epitopes and the 830-843 region of tetanus toxoid as a T-helper cell epitope was synthesized. This basic structure was covalently linked to produce a four-JY1-branched homodimer (JY1-MAP4). Additionally, six different monomeric MAPs, bearing four copies of V3 from isolates LR150, JY1, RF, MN, BRVA and IIIB, were synthesized. These monomers were conveniently linked among themselves to produce homodimeric and heterodimeric MAPs of eight V3 branches (V3-MAP8). JY1-MAP8 elicited higher antibody titers in Balb/c mice than JY1-MAP4. The immunogenicity of two different, hexavalent V3-MAP8 mixtures and the MEP TAB9, which tandems the same six V3 sequences in a single molecule, were compared. The antibody response against the mixtures of the heterodimeric MAP showed a wider recognition pattern of the V3 region, while the homodimeric cocktail showed an intermediate pattern. Antibodies elicited by TAB9 recognized only the JY1, LR150 peptides. These results emphasize the influence of V3 epitope presentation upon the characteristics of the antibody response generated.
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Affiliation(s)
- L J Cruz
- División de Quimíca-Física, Centro de Ingeniería Genética y Biotecnología, Cubanacán, Habana, Cuba.
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Chen ZP, Yarosh D, Garcia Y, Tampieri D, Mohr G, Malapetsa A, Langleben A, Panasci LC. Relationship between O6-methylguanine-DNA methyltransferase levels and clinical response induced by chloroethylnitrosourea therapy in glioma patients. Can J Neurol Sci 1999; 26:104-9. [PMID: 10352868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
BACKGROUND Adjuvant nitrosourea chemotherapy fails to prolong survival significantly as many tumors demonstrate resistance to these drugs. It has been documented in cell lines that O6-methylguanine DNA methyltransferase (MGMT) plays an important role in chloroethylnitrosourea (CENU) drug resistance. METHODS We evaluated MGMT expression in 22 glioma specimens by using an immunofluorescence assay and compared the results with clinical responses of the patients to CENU-based chemotherapy. RESULTS Eight tumor samples had no detectable MGMT, whereas other samples had from 9,989 to 982,401 molecules/nucleus. In one group (12 patients), the tumor decreased in size or was stable (effective group), whereas in the other group (10 patients), the tumor demonstrated continuous growth during chemotherapy (progressive group). The Mer- patients (MGMT < 60,000 molecules/nucleus) appeared to have more chance of stable disease or response to CENU therapy than the Mer+ patients (MGMT > 60,000 molecules/nucleus) (X2 = 4.791, p = 0.0286). In patients with glioblastomas multiforme (GBMs), the median time to progression (TTP) of Mer+ patient was shorter than that of Mer- patient (t = 2.04, p = 0.049). As a corollary, the MGMT levels were significantly higher in GBM tumors from the progressive group than those from the effective group (t = 2.26, p = 0.029). However, there was no significant correlation between MGMT levels and either the survival time (r = 0.04, p = 0.8595) or TTP (r = 0.107, p = 0.6444). CONCLUSION This study suggests that being MGMT positive is indicative of a more aggressive disease that progresses more rapidly with CENU therapy. However, MGMT negative tumors are not always sensitive to CENU agents, suggesting that other factors are also important.
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Affiliation(s)
- Z P Chen
- Lady Davis Institute for Medical Research, Sir Mortimer B. Davis Jewish General Hospital, Montreal, Quebec
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Michalowicz A, Moscovici J, Garcia Y, Kahn O. Polymeric spin transition compounds: EXAFS and thermal behaviour. J Synchrotron Radiat 1999; 6:231-232. [PMID: 15263259 DOI: 10.1107/s090904959900093x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/1998] [Accepted: 01/18/1999] [Indexed: 05/24/2023]
Affiliation(s)
- A Michalowicz
- Groupe de Physique des Millieux Denses, Université Paris XII, Créteil, France.
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Chen ZP, Yarosh D, Garcia Y, Tampieri D, Mohr G, Langleben A, Panasci LC. Clinical response of O(6)-methylguanine-DNA methyltransferase levels to 1,3-(2-chloroethyl)-1-nitrosourea chemotherapy in glioma patients. Neurosurg Focus 1998; 4:e3. [PMID: 17154443 DOI: 10.3171/foc.1998.4.4.4] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Adjuvant nitrosourea chemotherapy fails to prolong patient survival significantly as many tumors demonstrate resistance to these drugs. It has been documented in cell lines that O(6)-methylguanine-DNA methyltransferase (MGMT) plays an important role in chloroethylnitrosourea (CENU) drug resistance. The authors evaluated MGMT expression in 22 glioma specimens by using an immunofluorescence assay and compared the results with clinical response of the patients to CENU-based chemotherapy. The patients were treated with CENU after evidence of progressive disease following surgery and radiotherapy. Eight tumor samples had no detectable MGMT, whereas other samples had from 9989 to 982,401 molecules/nucleus. In one group (12 patients), the tumor decreased in size or was stable (effective group), whereas in the other group (10 patients), the tumor demonstrated continuous growth during chemotherapy (progressive group). The median time to progression (TTP) was 6.7 months with a median survival of 13 months. The Mer(-) patients (MGMT < 60,000 molecules/nucleus) appeared to have more chance of stable disease or response to CENU therapy than the Mer(+) patients (MGMT > 60,000 molecules/nucleus) (chi-square = 4.791, p = 0.0286). In patients with glioblastomas multiforme (GBMs), the TTP of Mer(+) patients was shorter than that of Mer(-) patients (t = 2.04, p = 0.049). As a corollary, the MGMT levels were significantly higher in GBM tumors from the progressive group than those from the effective group (t = -2.26, p = 0.029). The TTP and survival time in the effective GBM group were also longer than those in the progressive GBM group. However, there was no significant correlation between MGMT levels and either the survival time (r = 0.04, p = 0.8595) or TTP (r = 0.107, p = 0.6444). Results from this study suggested that MGMT positivity is indicative of more aggressive disease that progresses more rapidly when exposed to CENU therapy. However, MGMT-negative tumors are not always sensitive to CENU agents, suggesting that other factors may also be important.
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Affiliation(s)
- Z P Chen
- Divisions of Medical Oncology and Neurosurgery, Lady Davis Institute for Medical Research, Sir Mortimer B. Davis Jewish General Hospital, Montreal, Quebec, Canada; Montreal Neurological Institute, Montreal, Quebec, Canada; Division of Medical Oncology, Royal Victoria Hospital, Montreal, Quebec, Canada; and Applied Genetics Inc., Freeport, New York
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Abstract
The effect of L-cysteine sulfinic acid (CSA) and L-homocysteic acid (HCA) on the release of tritiated gamma-amino butyric acid ([3H]GABA), from the external plexiform layer (EPL) of the rat olfactory bulb, was compared with that of glutamate. These amino acids induced release of GABA was strongly inhibited by the glutamate uptake blocker, pyrrolidine-2,4-dicarboxylate (2,4,PDC) (50 microM), while it was not inhibited by the specific GABA uptake blockers nipecotic acid (0.5 mM) or NO-711 (5 microM). Only the HCA induced GABA release was 60% inhibited by beta-alanine (0.5 mM), a glial GABA uptake blocker and 78% by the NMDA receptor antagonist 2-amino-5-phosphonopentanoic acid (AP-5) (100 microM). The non-NMDA receptor antagonists 6-cyano-2,3-dihydroxy-7-nitro-quinoxaline (CNQX) up to 500 microM had no effect on HCA or CSA stimulated GABA release. These results bring evidence for an excitatory role of HCA and CSA together with glutamate on GABAergic neuronal or glial elements, in the olfactory bulb. This role could be mediated through the reversal of the glutamate or/and the glial GABA transporter and through the activation of a NMDA type receptor.
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Affiliation(s)
- E H Jaffe
- Lab. Neuroquimica, Centro Biofisica y Bioquimica, IVIC, Caracas, Venezuela.
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White A, Kibitel J, Garcia Y, Belanich M, Yarosh D, Wideroff J, Levin L, Held D, Fuchs A, Citron M. O6-Alkylguanine-DNA alkyltransferase in normal colon tissue and colon cancer. Oncol Res 1997; 9:149-53. [PMID: 9220500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
O6-Alkylguanine-DNA alkyltransferase (AGT) is a DNA repair protein that reverses alkylation damage produced by chloroethylnitrosoureas and is a major determinant of cellular resistance to adjuvant chemotherapy with these drugs. AGT activity was measured in 119 samples from 69 patients, including normal, tumor, and diseased tissue, and 42 patients in which both normal and tumor tissue were assayed. The activity varied among individuals, but there was no statistically significant difference in average AGT activity among tumor, normal, and diseased tissue, or between men and women, or between young and old patients (< 70 or > 70 years). Few (3/49) tumor samples showed an absence of AGT activity (Mer- phenotype). The results indicate that nearly all colon cancers have significant AGT activity, and adjuvant chloroethylnitrosoureas chemotherapy must be modified, perhaps by the use of AGT biochemical modulators, to overcome this natural drug resistance.
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Affiliation(s)
- A White
- Long Island Jewish Medical Center, New Hyde Park, NY 11042, USA
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Lenz HJ, Leichman CG, Danenberg KD, Danenberg PV, Groshen S, Cohen H, Laine L, Crookes P, Silberman H, Baranda J, Garcia Y, Li J, Leichman L. Thymidylate synthase mRNA level in adenocarcinoma of the stomach: a predictor for primary tumor response and overall survival. J Clin Oncol 1996; 14:176-82. [PMID: 8558194 DOI: 10.1200/jco.1996.14.1.176] [Citation(s) in RCA: 248] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
PURPOSE We tested the hypothesis that polymerase chain reaction (PCR) quantitation of the enzyme thymidylate synthase (TS) within a primary adenocarcinoma of the stomach, has an inverse relationship to response and survival for patients who receive fluorouracil (5FU)-based chemotherapy. PATIENTS AND METHODS Before systemic chemotherapy, the genetic expression of TS (TSmRNA level) was determined using a PCR method. Gene expression was calculated by determining the ratio between the amount of radiolabeled PCR product with the linear amplification range of the TS gene and the beta-actin gene. Chemotherapy consisted of two cycles of protracted infusion (PI) 5FU 200 mg/m2/d administered for 3 weeks with leucovorin 20 mg/m2/w. Cisplatin 100 mg/m2 was administered on day 1. RESULTS Sixty-five patients with primary gastric cancer had a median TS mRNA level of 4.6 x 10(-3) (range, 0.9 to 20.1 x 10(-3)). Thirty-five percent of patients had measurable responses in their primary tumors. The mean gastric cancer TSmRNA level in responding and resistant patients is statistically significant (P < .001). The median survival time was 43+ months for treated patients with TSmRNA levels less than the median and 6 months for those with TS m-RNA levels greater than the median (P = .003). CONCLUSION The genetic expression of TS (TSmRNA level) influences response to 5FU-based chemotherapy and survival for a cohort of patients with primary gastric cancer. Confirmation of these data could lead to therapeutic decisions based on specific molecular properties within a tumor.
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Affiliation(s)
- H J Lenz
- Department of Medicine, University of Southern California School of Medicine, Los Angeles, USA
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Herrera I, Martinez P, Perez P, Garcia Y, Gomez-Lus ML, Prieto J. Enhanced susceptibility of Staphylococcus aureus pretreated with cefepime and cefpodoxime to leukocyte activity. J Chemother 1995; 7 Suppl 4:23-5. [PMID: 8904094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- I Herrera
- Department of Microbiology, Faculty of Medicine, Complutense University of Madrid, Spain
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42
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Lejeune FJ, Beaumont L, Garcia Y, Regnier R. Peritoneal macrophage cytotoxicity induced by serum in vitro. Biomedicine 1978; 28:48-54. [PMID: 667276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The authors studied the effects of peritoneal macrophages on the growth of HP2 cells, a continuous line isolated from the transplanted Harding-Passey mouse melanoma. They found that normal peritoneal macrophages can exert a strong cytostatic effect on HP2 cells, as expressed by cell number and tritiated thymidine uptake by the target cells. The data indicates that normal heat inactivated sera from various species can render macrophages cytostatic. In addition, normal serum can amplify the cytostatic properties of macrophages from immunized animals. The results are discussed in the light of present knowledge of macrophage metabolism.
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Lejeune FJ, Beaumont E, Garcia Y. Growth inhibitory effect of peritoneal macrophages on Harding Passey melanoma, its impairment by macrophage lysosome overloading. Br J Cancer 1973; 28:80. [PMID: 4724620 PMCID: PMC2009026 DOI: 10.1038/bjc.1973.87] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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