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Dyrda A, Rey A, Pighin MS, Jürgens I. Transient intraoperative opacification of a Carlevale intraocular lens. J Fr Ophtalmol 2023; 46:e28-e29. [PMID: 36470751 DOI: 10.1016/j.jfo.2022.07.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Accepted: 07/01/2022] [Indexed: 12/04/2022]
Affiliation(s)
- A Dyrda
- Institut Català de Retina, C/de Ganduxer, 117, 08022 Barcelona, Spain.
| | - A Rey
- Institut Català de Retina, C/de Ganduxer, 117, 08022 Barcelona, Spain
| | - M S Pighin
- Institut Català de Retina, C/de Ganduxer, 117, 08022 Barcelona, Spain
| | - I Jürgens
- Institut Català de Retina, C/de Ganduxer, 117, 08022 Barcelona, Spain
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2
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Martínez Coq P, Rey A, Rosso OA, Armentano R, Legnani W. Detection of cardiac arrhythmia patterns in ECG through H × C plane. Chaos 2022; 32:123118. [PMID: 36587353 DOI: 10.1063/5.0118717] [Citation(s) in RCA: 1] [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] [Received: 08/05/2022] [Accepted: 11/10/2022] [Indexed: 06/17/2023]
Abstract
The aim of this study is to formulate a new methodology based upon informational tools to detect patients with cardiac arrhythmias. As it is known, sudden death is the consequence of a final arrhythmia, and here lies the relevance of the efforts aimed at the early detection of arrhythmias. The information content in the time series from an electrocardiogram (ECG) signal is conveyed in the form of a probability distribution function, to compute the permutation entropy proposed by Bandt and Pompe. This selection was made seeking its remarkable conceptual simplicity, computational speed, and robustness to noise. In this work, two well-known databases were used, one containing normal sinus rhythms and another one containing arrhythmias, both from the MIT medical databank. For different values of embedding time delay τ, normalized permutation entropy and statistical complexity measure are computed to finally represent them on the horizontal and vertical axes, respectively, which define the causal plane H×C. To improve the results obtained in previous works, a feature set composed by these two magnitudes is built to train the following supervised machine learning algorithms: random forest (RF), support vector machine (SVM), and k nearest neighbors (kNN). To evaluate the performance of each classification technique, a 10-fold cross-validation scheme repeated 10 times was implemented. Finally, to select the best model, three quality parameters were computed, namely, accuracy, the area under the receiver operative characteristic (ROC) curve (AUC), and the F1-score. The results obtained show that the best classification model to detect the ECG coming from arrhythmic patients is RF. The values of the quality parameters were at the same levels reported in the available literature using a larger data set, thus supporting this proposal that uses a very small-sized feature space to train the model later used to classify. Summarizing, the attained results show the possibility to discriminate both groups of patients, with normal sinus rhythm or arrhythmic ECG, showing a promising efficiency in the definition of new markers for the detection of cardiovascular pathologies.
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Affiliation(s)
- P Martínez Coq
- Signal and Image Processing Center (CPSI), Facultad Regional Buenos Aires. Universidad Tecnológica Nacional, Ciudad Autónoma de Buenos Aires C1179AAQ, Argentina
| | - A Rey
- Signal and Image Processing Center (CPSI), Facultad Regional Buenos Aires. Universidad Tecnológica Nacional, Ciudad Autónoma de Buenos Aires C1179AAQ, Argentina
| | - O A Rosso
- Physics Institute, Universidade Federal de Alagoas (UFAL), Maceió CEP 57072-900, Brazil
| | - R Armentano
- Bioengineering Research and Development Group (GIBIO), Facultad Regional Buenos Aires. Universidad Tecnológica Nacional, Ciudad Autónoma de Buenos Aires C1179AAQ, Argentina
| | - W Legnani
- Signal and Image Processing Center (CPSI), Facultad Regional Buenos Aires. Universidad Tecnológica Nacional, Ciudad Autónoma de Buenos Aires C1179AAQ, Argentina
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Spiegel K, Rey A, Ayling K, Benedict C, Lange T, Prather A, Irwin M, Van Cauter E. Impact of sleep duration on the response to vaccination: A meta-analysis. Sleep Med 2022. [PMCID: PMC9300187 DOI: 10.1016/j.sleep.2022.05.485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Bosch J, Moayyedi P, Alings M, Avezum A, Bangdiwala SI, Barkun A, Cassella F, da Rocha AM, Duzen I, Enns R, Forbes N, Hamilton L, Islam S, Kilickap M, Kruger P, Liang Y, Nicolau JC, Nunes R, O’Donnell M, Oliveira G, Rey A, Sun Y, Vanassche T, Verhamme P, Walsh M, Wang Z, Wu C, Zhao L, Zhu J, Eikelboom JW. INTERBLEED: Design of an international study of risk factors for gastrointestinal bleeding and cardiovascular events after gastrointestinal bleeding. CJC Open 2022; 4:996-1005. [DOI: 10.1016/j.cjco.2022.08.002] [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] [Received: 05/23/2022] [Accepted: 08/02/2022] [Indexed: 10/15/2022] Open
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5
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Mathews S, Daghash S, Rey A, Servio P. Recent Advances in Density Functional Theory and Molecular Dynamics Simulation of Mechanical, Interfacial, and Thermal Properties of Natural Gas Hydrates in Canada. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Samuel Mathews
- Department of Chemical Engineering McGill University Montréal Québec Canada
| | - Shaden Daghash
- Department of Chemical Engineering McGill University Montréal Québec Canada
| | - Alejandro Rey
- Department of Chemical Engineering McGill University Montréal Québec Canada
| | - Phillip Servio
- Department of Chemical Engineering McGill University Montréal Québec Canada
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6
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Wang Z, Servio P, Rey A. Wrinkling pattern formation with periodic nematic orientation: From egg cartons to corrugated surfaces. Phys Rev E 2022; 105:034702. [PMID: 35428159 DOI: 10.1103/physreve.105.034702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 03/04/2022] [Indexed: 06/14/2023]
Abstract
Egg cartons, known as doubly sinusoidal surfaces, display a rich variety of saddles-cylinder-spherical patches organized with different spatial symmetries and connectivities. Egg carton surfaces, rich in functionalities, are observed in synthetic and biological materials, as well as across atomic and macroscopic scales. In this work we use the liquid crystal shape equation in the absence of elastic effects and normal stress jumps to predict and classify a family of uniaxial, equibiaxial, and biaxial egg cartons, according to the periodicities of the surface director field in nematic (N) and cholesteric (N*) liquid crystals under the presence of anisotropic surface tension (anchoring). Egg carton surface shape periodic solutions to the nonlinear and linearized liquid crystal shape equations predict that the mean curvature is a linear function of the orthogonal (along the surface normal) splay and bend contributions. Mixtures of egg carton surfaces (uniaxial, equibiaxial, and biaxial) emerge according to the symmetries of the nonsingular director field, and the spatial distributions of the director escape into the third dimension; pure uniaxial egg cartons emerge when the director escape has linelike geometries and mixtures of egg cartons arise under source or sink orientation lattices. Orientation symmetry and permutation analysis are incorporated into a full curvature (Casorati, shape parameter, mean curvature, and Gaussian curvature) characterization. Under a fixed anchoring parameter, conditions for maximal nanoscale curvedness and microscale maximal shape gradient diversity are identified. The present results contribute to various pathways to surface pattern formation using intrinsic anisotropic interfacial tension.
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Affiliation(s)
- Ziheng Wang
- Department of Chemical Engineering, McGill University, 3610 University Street, Montréal, Québec, Canada H3A 0C5
| | - Phillip Servio
- Department of Chemical Engineering, McGill University, 3610 University Street, Montréal, Québec, Canada H3A 0C5
| | - Alejandro Rey
- Department of Chemical Engineering, McGill University, 3610 University Street, Montréal, Québec, Canada H3A 0C5
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Rey A, Malézieux O, Potié A. The fresh gas flow decoupling valve and the potential for leaks in the anaesthetic circle breathing system. Anaesth Rep 2021; 9:e12141. [PMID: 34881364 DOI: 10.1002/anr3.12141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/12/2021] [Indexed: 11/06/2022] Open
Affiliation(s)
- A Rey
- Department of Anaesthesiology Lausanne University Hospital-CHUV Lausanne Switzerland
| | - O Malézieux
- Department of Anaesthesiology Lausanne University Hospital-CHUV Lausanne Switzerland
| | - A Potié
- Department of Anaesthesiology Lausanne University Hospital-CHUV Lausanne Switzerland
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Chávez A, Rey A, López J, Álvarez P, Beltrán F. Critical aspects of the stability and catalytic activity of MIL-100(Fe) in different advanced oxidation processes. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117660] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Tejeria M, Teran Gretter M, Cardoso E, Rey A. Neuropeptide Y short analogue as potential breast cancer diagnostic and therapeutic agent. Nucl Med Biol 2019. [DOI: 10.1016/s0969-8051(19)30252-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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10
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Tejeria M, Pietzsch HJ, Rey A, Giglio J. Development and evaluation of a 99mTc(III) ‘4 + 1’ complex derived from estradiol for imaging breast cancer. Nucl Med Biol 2019. [DOI: 10.1016/s0969-8051(19)30201-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: 11/17/2022]
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11
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Allie S, Hegoburu I, Shin MJ, Jung JY, Toader V, Rey A, Soule ER, Reven L. Polymer functionalized nanoparticles in liquid crystals: combining PDLCs with LC nanocomposites. Soft Matter 2018; 14:8580-8589. [PMID: 30318545 DOI: 10.1039/c8sm01192c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Liquid crystal (LC)-polymer blends are important stimuli responsive materials already employed in a wide range of applications whereas nanoparticle (NP)-LC blends are an emerging class of nanocomposites. Polymer ligands offer the advantages of synthetic simplicity along with chemical and molecular weight tunability. Here we compare the phase behavior of 5CB blended with poly(ethylene oxide) (PEO) and with gold NPs functionalized with thiolated PEO (AuNP-PEO) as a function of PEO concentration by DSC, POM and 13C NMR spectroscopy. Both PEO and the AuNP-PEO form uniform dispersions in isotropic 5CB and phase separate below the I-N phase transition temperature. Above the PEO crystallization temperature, the PEO/5CB blends show the expected biphasic state of PEO rich-isotropic liquid co-existing with PEO-poor nematic droplets. At PEO concentrations above 10 wt%, nematic 5CB nucleates with PEO crystallization. Both PEO and AuNP-PEO induce homeotropic alignment of the 5CB matrix immediately below TNI. The AuNP-PEO/5CB blends form thermally reversible cellular networks similar to AuNPs functionalized with low molecular weight mesogenic ligands. A thermodynamic model to account for the observed phase behavior is presented.
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Affiliation(s)
- Safiya Allie
- Quebec Centre for Advanced Materials, Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal QC H3A 0B8, Canada.
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Rey A, López-Bote C, Litta G. Effects of dietary vitamin E (DL-α-tocopheryl acetate) and vitamin C combination on piglets oxidative status and immune response at weaning. J Anim Feed Sci 2017. [DOI: 10.22358/jafs/76595/2017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
Se presenta un caso de osteolisis carpo-tarsal multicéntrica, tipo de displasia esquelética extraordinariamente infrecuente, en una paciente de veintiún años de edad. El correcto diagnóstico de la enfermedad puede evitar tratamientos innecesarios.
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Affiliation(s)
| | | | | | | | | | - J. García
- Médicos Adjuntos Personal Docente Colaborador del Departamento de Cirugía. Universidad de Santiago de Compostela. A Coruña. España
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15
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Zhang Z, Nguyen Y, De Seta D, Russo FY, Rey A, Kalamarides M, Sterkers O, Bernardeschi D. Surgical treatment of sporadic vestibular schwannoma in a series of 1006 patients. Acta Otorhinolaryngol Ital 2017; 36:408-414. [PMID: 27600105 PMCID: PMC5225797 DOI: 10.14639/0392-100x-1176] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 06/19/2016] [Indexed: 11/23/2022]
Abstract
The management of sporadic vestibular schwannoma (VS) has evolved in the last decades. The aim of this study was to analyse the evolution in surgical outcomes of VSs operated by a neurotological team between 1990 and 2006 by different approaches. A monocentric retrospective review of medical charts of 1006 patients was performed. In order to assess eventual changes and progress, the 17-years period was divided in three periods, each one comprehending 268 VS (1990-1996), 299 VS (1997-2001), and 439 VS (2002-2006). Mean follow-up was 5.9 ± 2.4 years. Overall, complete VS removal was achieved in 99.4% of cases. Mortality rate was 0.3%, meningitis and CSF leaks were observed in 1.2 % and 9 % of the cases, respectively. CSF leakage decreased from 11.6% to 7.1% between the first and last period (p < 0.01) as well as revision surgery from 3.4 % to 0.9 % (p < 0.05). Facial nerve was anatomically preserved in 97.7% of cases. At one year, a good facial nerve function was observed in 85.1% of patients (grade I and II of House-Brackmann grading scale), which ranged between the first and last period from 78.4% to 87.6% (p <0.05). At one year, hearing preservation was obtained in 61.6% of patients, which increased from the first period to the last one from 50.9% to 69.0% (p < 0.05) (class A+B+C from the AAO-HNS classification). Useful hearing (class A+B) was observed in 33.5% of cases overall, with 21.8% and 42% in the first and last period, respectively (p < 0.01). Surgical outcomes of sporadic vestibular schwannoma have improved concerning facial nerve function outcomes, hearing preservation and cerebrospinal fluid (CSF) leaks, mainly due to the neuro-otological team's experience. Functional results after complete microsurgical removal of large VS depend on experience gained on small VS removal.
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Affiliation(s)
- Z Zhang
- AP-HP, Pitié-Salpêtrière Hospital, Department of Otology Auditory Implants and Skull Base Surgery, Paris, France.,Department of Otolaryngology Head and Neck Surgery, Xinhua Hospital Shanghai Jiaotong Univerrsity School of Medicine, Shanghai, China
| | - Y Nguyen
- AP-HP, Pitié-Salpêtrière Hospital, Department of Otology Auditory Implants and Skull Base Surgery, Paris, France
| | - D De Seta
- AP-HP, Pitié-Salpêtrière Hospital, Department of Otology Auditory Implants and Skull Base Surgery, Paris, France
| | - F Y Russo
- AP-HP, Pitié-Salpêtrière Hospital, Department of Otology Auditory Implants and Skull Base Surgery, Paris, France
| | - A Rey
- AP-HP, Beaujon Hospital, Department of Neurosurgery, Paris, France
| | - M Kalamarides
- AP-HP, Pitié- Salpêtrière Hospital, Department of Neurosurgery, Paris, France
| | - O Sterkers
- AP-HP, Pitié-Salpêtrière Hospital, Department of Otology Auditory Implants and Skull Base Surgery, Paris, France
| | - D Bernardeschi
- AP-HP, Pitié-Salpêtrière Hospital, Department of Otology Auditory Implants and Skull Base Surgery, Paris, France
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Gurevich S, Provatas N, Rey A. Nanoscale interfacial defect shedding in a growing nematic droplet. Phys Rev E 2017; 96:022707. [PMID: 28950582 DOI: 10.1103/physreve.96.022707] [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] [Received: 03/31/2017] [Indexed: 06/07/2023]
Abstract
Interfacial defect shedding is the most recent known mechanism for defect formation in a thermally driven isotropic-to-nematic phase transition. It manifests in nematic-isotropic interfaces going through an anchoring switch. Numerical computations in planar geometry established that a growing nematic droplet can undergo interfacial defect shedding, nucleating interfacial defect structures that shed into the bulk as +1/2 point defects. By extending the study of interfacial defect shedding in a growing nematic droplet to larger length and time scales, and to three dimensions, we unveil an oscillatory growth mode involving shape and anchoring transitions that results in a controllable regular distributions of point defects in planar geometry, and complex structures of disclination lines in three dimensions.
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Affiliation(s)
- Sebastian Gurevich
- Department of Chemical Engineering, McGill University, Montreal, QC, Canada
- Department of Physics, Centre for the Physics of Materials, McGill University, Montreal, QC, Canada
| | - Nikolas Provatas
- Department of Physics, Centre for the Physics of Materials, McGill University, Montreal, QC, Canada
| | - Alejandro Rey
- Department of Chemical Engineering, McGill University, Montreal, QC, Canada
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17
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Parallada G, Sereno V, Caballero G, Fernández M, Castro M, Montero D, Altez S, Rey A. 319 Nutritional intervention at the cystic fibrosis reference center of children and adults in Uruguay. J Cyst Fibros 2017. [DOI: 10.1016/s1569-1993(17)30657-4] [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: 10/19/2022]
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Parallada G, Rey A, Casavieja G, Cosentino D, Montero D, Ramirez P, Guillen S, Rutz G, Fontan M, Ramos A, Mendez R. 430 Transition in CF integrated teams working together. J Cyst Fibros 2017. [DOI: 10.1016/s1569-1993(17)30760-9] [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: 11/28/2022]
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19
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Sauzeau J, Inocente C, Rey A, Lin J, Herbillon V, Mazza S, Franco P. 0948 IMPAIRED SLEEP-DEPENDENT CONSOLIDATION IN CHILDREN WITH NARCOLEPSY TYPE 1. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.947] [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: 11/14/2022] Open
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20
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Fábrica CG, Alonso R, Rey A, Polero P, Berreta G. Explosive force in football association: effects of competition and field location. INT J PERF ANAL SPOR 2017. [DOI: 10.1080/24748668.2008.11868432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- C. Gabriel Fábrica
- Departamento de Biofísica (Unidad de Investigación en Biomecánica de la Locomoción Humana), Facultad de Medicina, Universidad de la República, General Flores 2125, CP 11800, Montevideo, Uruguay
| | - R. Alonso
- Unidad de Métodos Cuantitativos Facultad de Medicina, Universidad de la República, General Flores 2125, CP 11800 Montevideo, Uruguay
| | - A. Rey
- Departamento de Biofísica (Unidad de Investigación en Biomecánica de la Locomoción Humana), Facultad de Medicina, Universidad de la República, General Flores 2125, CP 11800, Montevideo, Uruguay
| | - P. Polero
- Departamento de Biofísica (Unidad de Investigación en Biomecánica de la Locomoción Humana), Facultad de Medicina, Universidad de la República, General Flores 2125, CP 11800, Montevideo, Uruguay
| | - G. Berreta
- Instituto Superior de Educación Física, Universidad de la República, Parque Batlle S/N, Montevideo, Uruguay
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Chamorro S, Viveros A, Rebolé A, Arija I, Romero C, Alvarez I, Rey A, Brenes A. Addition of exogenous enzymes to diets containing grape pomace: Effects on intestinal utilization of catechins and antioxidant status of chickens. Food Res Int 2017; 96:226-234. [PMID: 28528103 DOI: 10.1016/j.foodres.2017.02.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 02/14/2017] [Accepted: 02/17/2017] [Indexed: 10/20/2022]
Abstract
Grape pomace (GP) is a rich source of polyphenols with antioxidant capacity. An experiment was conducted to study the effect of GP phenolic compounds included at 5 and 10%, and the addition (individually or combined) of hydrolyzing enzymes (carbohydrase enzyme complex and tannase at 500ppm) on intestinal utilization of catechins and antioxidant status in broiler chickens. A diet supplemented with 200ppm of α-tocopheryl acetate was also used. Our findings demonstrate the capacity of chickens to digest the monomeric (catechin, epicatechin, gallic acid, and epicatechin-O-gallate) and dimeric (procyanidin B1 and procyanidin B2) catechins present in grape pomace. The addition of enzymes (mainly tannase) hydrolyzed the polymeric structures into smaller catechins, but also promoted a lower digestibility of the monomeric and dimeric catechins suggesting that polymeric structures might favour the intestinal utilization of these catechins. The intestinal accumulation of phenolic compounds generated with tannase and with 10% GP reversed the antimicrobial effect against Clostridium perfringens observed with 5% of GP. Grape pomace improved the antioxidant status of the bird, increasing the α-tocopherol and reducing the iron content on plasma, not affecting the plasma gluthatione. Enzymes modified the intestinal utilization of catechins but not additional protective effect was detected on any of the parameters analyzed to evaluate the antioxidant status.
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Affiliation(s)
- S Chamorro
- Instituto de Ciencia y Tecnología de Alimentos y Nutrición (ICTAN-CSIC), José Antonio Novais, 10, Ciudad Universitaria, 28040 Madrid, Spain.
| | - A Viveros
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Ciudad Universitaria, 28040 Madrid, Spain
| | - A Rebolé
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Ciudad Universitaria, 28040 Madrid, Spain
| | - I Arija
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Ciudad Universitaria, 28040 Madrid, Spain
| | - C Romero
- Universidad Católica de Ávila, 05005 Ávila, Spain
| | - I Alvarez
- Instituto de Ciencia y Tecnología de Alimentos y Nutrición (ICTAN-CSIC), José Antonio Novais, 10, Ciudad Universitaria, 28040 Madrid, Spain
| | - A Rey
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Ciudad Universitaria, 28040 Madrid, Spain
| | - A Brenes
- Instituto de Ciencia y Tecnología de Alimentos y Nutrición (ICTAN-CSIC), José Antonio Novais, 10, Ciudad Universitaria, 28040 Madrid, Spain
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Mena E, Rey A, Rodríguez E, Beltrán F. Nanostructured CeO 2 as catalysts for different AOPs based in the application of ozone and simulated solar radiation. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.04.034] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [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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Faisal TR, Hristozov N, Western TL, Rey A, Pasini D. The twist-to-bend compliance of the Rheum rhabarbarum petiole: integrated computations and experiments. Comput Methods Biomech Biomed Engin 2016; 20:343-354. [PMID: 27626758 DOI: 10.1080/10255842.2016.1233328] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Plant petioles can be considered as hierarchical cellular structures, displaying geometric features defined at multiple length scales. Their macroscopic mechanical properties are the cumulative outcome of structural properties attained at each level of the structural hierarchy. This work appraises the compliance of a rhubarb stalk by determining the stalk's bending and torsional stiffness both computationally and experimentally. In our model, the irregular cross-sectional shape of the petiole and the layers of the constituent tissues are considered to evaluate the stiffness properties at the structural level. The arbitrary shape contour of the petiole is generated with reasonable accuracy by the Gielis superformula. The stiffness and architecture of the constituent layered tissues are modeled by using the concept of shape transformers so as to obtain the computational twist-to-bend ratio for the petiole. The rhubarb stalk exhibits a ratio of flexural to torsional stiffness 4.04 (computational) and 3.83 (experimental) in comparison with 1.5 for isotropic, incompressible, circular cylinders, values that demonstrate the relative structural compliance to flexure and torsion.
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Affiliation(s)
- Tanvir R Faisal
- a Department of Mechanical Engineering , McGill University , Montreal , Canada.,b Department of Mechanical Engineering , University of Manitoba , Winnipeg , Canada
| | - Nicolay Hristozov
- c Department of Biology , McGill University , Montreal , Canada.,d Department of Cellular and Molecular Medicine , University of Ottawa , Ottawa , Canada
| | | | - Alejandro Rey
- e Department of Chemical Engineering , McGill University , Montreal , Canada
| | - Damiano Pasini
- a Department of Mechanical Engineering , McGill University , Montreal , Canada
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Abstract
Nanoparticle-liquid crystal (NP-LC) composites based on hydrogen bonding were explored using a model system. The ligand shells of 3 nm diameter zirconium dioxide nanoparticles (ZrO2 NPs) were varied to control their interaction with 4-n-hexylbenzoic acid (6BA). The miscibility and effect of the NPs on the nematic order as a function of particle concentration was characterized by polarized optical microscopy (POM), fluorescence microscopy and (2)H NMR spectroscopy. Nonfunctionalized ZrO2 NPs have the lowest miscibility and strongest effect on the LC matrix due to irreversible binding of 6BA to the NPs via a strong zirconium carboxylate bond. The ZrO2 NPs were functionalized with 6-phosphonohexanoic acid (6PHA) or 4-(6-phosphonohexyloxy)benzoic acid (6BPHA) which selectively bind to the ZrO2 NP surface via the phosphonic acid groups. The miscibility was increased by controlling the concentration of the pendant CO2H groups by adding hexylphosphonic acid (HPA) to act as a spacer group. Fluorescence microscopy of lanthanide doped ZrO2 NPs showed no aggregates in the nematic phase below the NP concentration where aggregates are observed in the isotropic phase. The functionalized NPs preferably concentrate into LC defects and any remaining isotropic liquid but are still present throughout the nematic liquid at a lower concentration.
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Affiliation(s)
- Mahdi Roohnikan
- Department of Chemistry, Centre for Self-Assembled Chemical Structures (CSACS) , 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
- Department of Chemical Engineering, McGill University , Montreal, Quebec H3A 0C5, Canada
| | - Violeta Toader
- Department of Chemistry, Centre for Self-Assembled Chemical Structures (CSACS) , 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Alejandro Rey
- Department of Chemical Engineering, McGill University , Montreal, Quebec H3A 0C5, Canada
| | - Linda Reven
- Department of Chemistry, Centre for Self-Assembled Chemical Structures (CSACS) , 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
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Rey A, Losada C, Santillán J, Fiorentini F, Schiaffino M, Peroni HJ, Giunta D, Barcán L, Waisman G. [Pneumocystis jiroveci infection in patients with and without HIV: A comparison]. Rev Chilena Infectol 2016; 32:175-80. [PMID: 26065450 DOI: 10.4067/s0716-10182015000300006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 01/06/2015] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Respiratory infection caused by Pneumocystis jiroveci is a common opportunistic infection in patients with human immunodeficiency virus (HIV) with CD4 counts < 200 cells/mm(3). However, it has also been reported in patients with other causes of immunosuppression. OBJECTIVES To compare the characteristics, severity and mortality of respiratory infection by P. jiroveci in patients with and without HIV infection. METHODS Retrospective cohort follow-up of adult patients admitted to our hospital with infection by P. jiroveci since 2006 to 2013. RESULTS We included 82 patients with respiratory infection by P. jiroveci of which 55% (45) were not infected with HIV. In this group, 68.8% (31) had diagnosis of cancer and 20% (9) received solid-organ transplant. 57.9% (26) were hospitalized in an intensive care unit. 42.2% (19) suffered multiple organ failure (MOF), 46.7% (21) required mechanical ventilation (MV) and 40.9% (18) inotropic drugs. Mortality was 33.3% (15). Statistically significant differences were observed between groups in age (p < 0.001), requirement of MV (p < 0.001) inotropic drugs (p 0.001) and MOF (p < 0.001). Mortality was higher in the HIV-positive group, reaching statistical significance (p 0.007). CONCLUSION Pneumocystis pneumonia mortality was higher in patients without HIV, who suffered more complications and progression to respiratory failure with MOF.
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Rey A, Busnelli VMC, Santino JP, Van Domselaar F, Quintana GO, Seehaus AC, De Paula JA. Extensive mesenteric lipodystrophy of the left colon: case report and brief review of the literature. Acta Gastroenterol Latinoam 2016; 46:43-47. [PMID: 29470884] [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: 06/08/2023]
Abstract
Mesenteric lipodystrophy is a rare inflammatory process that predominantly affects mesenteric adipose tissue of the small bowell. Several mechanisms have been suggested as responsible for this entity although the precise etiolog remains unknown. The diagnosis is based on CT or MRI imaging and generally confirmed by surgical biopsies. Treatment is individualized and empiric and depends on disease stage and symptoms. We report a case of a 35-year-old male who was admitted to our hospital with a history of abdominal pain, constipation and a palpable mass in the left lower quadrant. Abdominal CT scan showed diffuse thickening of the descending and rectosigmoid colon, associated with increased density of the mesenteric fat. After failure ofan initial treat- ment with glucocorticoids, he underwent a laparoscopic sigmoidectomy. Histopatholog analysis revealed extensive stea- tonecrosis ofpericolonicfat and lipid-ladenfoamy cells which was consistent with the diagnosis of mesenteric lipodystrophy. Clinical presentation and treatment as well as a brief review of the literature are discussed.
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Rey A, Berrué M, Chambaraud T, Rerolle JP, Allard J, Essig M, Monchaud C. Drug-Induced Nephrotoxicity: A Frequent Cause of Hospitalization In Nephrology. Clin Ther 2015. [DOI: 10.1016/j.clinthera.2015.05.089] [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]
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Ayuso M, Fernández A, Isabel B, Rey A, Benítez R, Daza A, López-Bote CJ, Óvilo C. Long term vitamin A restriction improves meat quality parameters and modifies gene expression in Iberian pigs1. J Anim Sci 2015; 93:2730-44. [DOI: 10.2527/jas.2014-8573] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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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Rey A, Mena E, Chávez A, Beltrán F, Medina F. Influence of structural properties on the activity of WO 3 catalysts for visible light photocatalytic ozonation. Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2014.12.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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30
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De Rouge TM, Pautier P, Duvillard P, Rey A, Morice P, Meder CH, Kerbrat P, Culine S, Fizazi K, Lhomme C. Prognostic Significance of Serum Alphafoetoprotein Early Decline in Ovarian Yolk Sac Tumor. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu338.25] [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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31
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Merks JHM, De Salvo GL, Bergeron C, Bisogno G, De Paoli A, Ferrari A, Rey A, Oberlin O, Stevens MCG, Kelsey A, Michalski J, Hawkins DS, Anderson JR. Parameningeal rhabdomyosarcoma in pediatric age: results of a pooled analysis from North American and European cooperative groups. Ann Oncol 2014; 25:231-6. [PMID: 24356633 DOI: 10.1093/annonc/mdt426] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Parameningeal (PM) site is a well-known adverse prognostic factor in children with localized rhabdomyosarcoma (RMS). To identify risk factors associated with outcome at this site, we pooled data from 1105 patients treated in 10 studies conducted by European and North American cooperative groups between 1984 and 2004. PATIENTS AND METHODS Clinical factors including age, histology, size, invasiveness, nodal involvement, Intergroup Rhabdomyosarcoma Study (IRS) clinical group, site, risk factors for meningeal involvement (MI), study group, and application of radiotherapy (RT) were studied for their impact on event-free and overall survival (EFS and OS). RESULTS Ten-year EFS and OS were 62.6 and 66.1% for the whole group. Patients without initial RT showed worse survival (10-year OS 40.8% versus 68.5% for RT treated patients). Multivariate analysis focusing on 862 patients who received RT as part of their initial treatment revealed four unfavorable prognostic factors: age <3 or >10 years, signs of MI, unfavorable site, and tumor size. Utilizing these prognostic factors, patients could be classified into different risk groups with 10-year OS ranging between 51.1 and 80.9%. CONCLUSIONS While, in general, PM localization is regarded as an adverse prognostic factor, the current analysis differentiates those with good prognosis (36% patients with 0-1 risk factor: 10-year OS 80.9%) from high-risk PM patients (28% with 3-4 factors: 10-year OS 51.1%). Furthermore, this analysis reinforces the necessity for RT in PM RMS.
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Affiliation(s)
- J H M Merks
- Department of Pediatric Oncology, Emma Children's Hospital-Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
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Gurevich S, Soule E, Rey A, Reven L, Provatas N. Self-assembly via branching morphologies in nematic liquid-crystal nanocomposites. Phys Rev E Stat Nonlin Soft Matter Phys 2014; 90:020501. [PMID: 25215674 DOI: 10.1103/physreve.90.020501] [Citation(s) in RCA: 2] [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: 05/06/2014] [Indexed: 06/03/2023]
Abstract
We demonstrate that the morphological diversity in liquid-crystal hybrid systems is much richer than previously anticipated. More importantly, we reveal the existence of a dual mechanism for self-assembly of nanoparticles via morphological instabilities at phase boundaries. Using numerical simulations, we study the growth of isolated nematic droplets in an isotropic liquid crystal (LC) doped with nanoparticles (NPs) and provide insight into the nature of microstructure evolution in LC hybrids. Our work expands the numerically accessible time and length scales in these systems, capturing morphologies which develop under the competition of nonequilibrium elastic interactions, diffusive instabilities mediated by NP transport, and the anisotropy of the nematic field. By mapping nematic morphologies, we also propose a methodology for estimating various important LC material parameters that are difficult to obtain experimentally.
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Affiliation(s)
- Sebastian Gurevich
- Department of Physics, Centre for the Physics of Materials, McGill University, Montreal, Quebec, Canada and Department of Chemical Engineering, McGill University, Montreal, Quebec, Canada
| | - Ezequiel Soule
- Institute of Materials Science and Technology (INTEMA), University of Mar del Plata and National Research Council (CONICET), Mar del Plata, Argentina
| | - Alejandro Rey
- Department of Chemical Engineering, McGill University, Montreal, Quebec, Canada
| | - Linda Reven
- Chemistry Department, McGill University, Montreal, Quebec, Canada
| | - Nikolas Provatas
- Department of Physics, Centre for the Physics of Materials, McGill University, Montreal, Quebec, Canada
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Bauzán L, Fernández S, Dematteis S, Cerecetto H, Giglio J, Rey A. Novel 99mTc-labelled estrogen derivative as potential agent for estrogen receptors imaging. Nucl Med Biol 2014. [DOI: 10.1016/j.nucmedbio.2014.05.095] [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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Abstract
False-name manipulation refers to the question of whether a player in a weighted voting game can increase her power by splitting into several players and distributing her weight among these false identities. Relatedly, the beneficial merging problem asks whether a coalition of players can increase their power in a weighted voting game by merging their weights. For the problems of whether merging or splitting players in weighted voting games is beneficial in terms of the Shapley--Shubik and the normalized Banzhaf index, merely NP-hardness lower bounds are known, leaving the question about their exact complexity open. For the Shapley--Shubik and the probabilistic Banzhaf index, we raise these lower bounds to hardness for PP, "probabilistic polynomial time," a class considered to be by far a larger class than NP. For both power indices, we provide matching upper bounds for beneficial merging and, whenever the new players' weights are given, also for beneficial splitting, thus resolving previous conjectures in the affirmative. Relatedly, we consider the beneficial annexation problem, asking whether a single player can increase her power by taking over other players' weights. It is known that annexation is never disadvantageous for the Shapley--Shubik index, and that beneficial annexation is NP-hard for the normalized Banzhaf index. We show that annexation is never disadvantageous for the probabilistic Banzhaf index either, and for both the Shapley--Shubik index and the probabilistic Banzhaf index we show that it is NP-complete to decide whether annexing another player is advantageous. Moreover, we propose a general framework for merging and splitting that can be applied to different classes and representations of games.
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Uzan C, Nikpayam M, Ribassin-Majed L, Gouy S, Bendifallah S, Cortez A, Rey A, Duvillard P, Darai E, Morice P. Influence of histological subtypes on the risk of an invasive recurrence in a large series of stage I borderline ovarian tumor including 191 conservative treatments. Ann Oncol 2014; 25:1312-1319. [PMID: 24713312 DOI: 10.1093/annonc/mdu139] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [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] [Indexed: 08/08/2023] Open
Abstract
BACKGROUND The overall prognosis of stage I borderline ovarian tumors (BOT) is excellent but a small percentage of patients die to their disease. The prognostic factors for such a rare event are still not clearly defined. The aim of this study was to determine these factors for recurrence per se and recurrence in the form of invasive carcinoma in a large series of stage I tumors. METHODS A retrospective review of patients with BOT. Three inclusion criteria were defined: (i) a centralized histological review; (ii) macroscopic stage I tumors; (iii) exclusion of metastatic disease to the ovaries. RESULTS From 2000 to 2010, 254 patients fulfilled inclusion criteria [140 had mucinous BOT (MBOT) and 114 a serous BOT (SBOT)], and 191 had undergone conservative management. After a median follow-up of 45 months, 43 patients had developed recurrences (31 borderline and 12 invasive). The risks of recurrences were statistically increased after conservative treatment, particularly after a cystectomy, in patients with stage IB and among patients with incompletely staged tumors. In the subgroup of conservatively treated patients (representing 75% of our population), the risks of recurrences were statistically increased in patients affected by a SBOT, in patients who had undergone a cystectomy, in patients with stage IB disease and in patients with a micropapillary pattern (MPP). MBOT and the presence of a MPP were identified as prognostic factors for invasive disease. CONCLUSIONS In the present series of BOT with the largest number of patients treated conservatively to date, the presence of a MPP and the mucinous subtype were associated with a higher rate of progression to carcinoma after conservative management. These important results suggest that MBOT belong to a 'high-risk' group likely to develop an invasive recurrence after fertility-sparing surgery in stage I BOT.
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Affiliation(s)
- C Uzan
- Department of Gynecologic Surgery; Unit INSERM U10-30, Villejuif
| | | | | | - S Gouy
- Department of Gynecologic Surgery
| | - S Bendifallah
- Department of Obstetrics and Gynaecology, Hopital Tenon, Paris; INSERM UMRS 938, Paris; Universite Pierre et Marie Curie (Paris VI), Paris
| | - A Cortez
- Department of Pathology, Hopital Tenon, Paris
| | - A Rey
- Department of Biostatistics, Institut Gustave Roussy, Villejuif
| | - P Duvillard
- Department of Pathology, Institut Gustave Roussy, Villejuif
| | - E Darai
- Department of Obstetrics and Gynaecology, Hopital Tenon, Paris; INSERM UMRS 938, Paris; Universite Pierre et Marie Curie (Paris VI), Paris
| | - P Morice
- Department of Gynecologic Surgery; Unit INSERM U10-30, Villejuif; University Paris Sud, Le Kremlin Bicêtre, France.
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Jacomet C, Guiguet M, Simon A, Rey A, Gerbaud L, Peyrol F. A-15: Quels patients VIH+ suivis dans les services hospitaliers français consultent en médecine générale ? Enquête « parcours de soins 2012 ». Med Mal Infect 2014. [DOI: 10.1016/s0399-077x(14)70098-8] [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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Giglio J, Dematteis S, Fernández S, Cerecetto H, Rey A. Synthesis and evaluation of a new99mTc(I)-tricarbonyl complex bearing the 5-nitroimidazol-1-yl moiety as potential hypoxia imaging agent. J Labelled Comp Radiopharm 2014; 57:403-9. [PMID: 24692093 DOI: 10.1002/jlcr.3195] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 12/09/2013] [Accepted: 02/09/2014] [Indexed: 11/08/2022]
Affiliation(s)
- J. Giglio
- Cátedra de Radioquímica, Facultad de Química; Universidad de la República; Montevideo Uruguay
| | - S. Dematteis
- Cátedra de Inmunología, Facultad de Química; Universidad de la República; Montevideo Uruguay
| | - S. Fernández
- Cátedra de Radioquímica, Facultad de Química; Universidad de la República; Montevideo Uruguay
| | - H. Cerecetto
- Área de Radiofarmacia y Radioquímica-CIN, Facultad de Ciencias; Universidad de la República; Montevideo Uruguay
| | - A. Rey
- Cátedra de Radioquímica, Facultad de Química; Universidad de la República; Montevideo Uruguay
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Figueras-Roca M, Rey A, Mesquida M, Pelegrín L, Llorens V, Fontenla JR, Adán A. [Retinal vasculopathy in systemic lupus erythematosus: a case of lupus vasculitis and a case of non-vasculitis venous occlusion]. Arch Soc Esp Oftalmol 2014; 89:66-69. [PMID: 24269411 DOI: 10.1016/j.oftal.2012.06.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2011] [Revised: 02/08/2012] [Accepted: 06/26/2012] [Indexed: 06/02/2023]
Abstract
CLINIC CASE Two patients with systemic lupus erythematosus presented with vision loss, and were diagnosed with retinal vasculopathy. Patient 1 had occlusive vasculitis with macular oedema and retinal ischaemia in the right eye. Corticosteroid therapy was increased and intravenous rituximab added. Intravitreal therapy and panretinal photocoagulation were performed. Patient 2 presented with a left central retinal vein occlusion without vasculitis but was on anticoagulation therapy due to having an antiphospholipid syndrome. Both patients maintained a stable visual acuity. DISCUSSION Occlusive lupus retinal vasculitis has severe visual and systemic consequences (central nervous system vasculitis). It is crucial to differentiate it from standard vascular occlusion syndromes.
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Affiliation(s)
- M Figueras-Roca
- Unidad de Retina y Segmento Posterior, Institut Clínic de Oftalmología, Hospital Clínic y Provincial de Barcelona, Barcelona, España.
| | - A Rey
- Unidad de Retina y Segmento Posterior, Institut Clínic de Oftalmología, Hospital Clínic y Provincial de Barcelona, Barcelona, España
| | - M Mesquida
- Unidad de Retina y Segmento Posterior, Institut Clínic de Oftalmología, Hospital Clínic y Provincial de Barcelona, Barcelona, España
| | - L Pelegrín
- Unidad de Retina y Segmento Posterior, Institut Clínic de Oftalmología, Hospital Clínic y Provincial de Barcelona, Barcelona, España
| | - V Llorens
- Unidad de Retina y Segmento Posterior, Institut Clínic de Oftalmología, Hospital Clínic y Provincial de Barcelona, Barcelona, España
| | - J R Fontenla
- Unidad de Retina y Segmento Posterior, Institut Clínic de Oftalmología, Hospital Clínic y Provincial de Barcelona, Barcelona, España
| | - A Adán
- Unidad de Retina y Segmento Posterior, Institut Clínic de Oftalmología, Hospital Clínic y Provincial de Barcelona, Barcelona, España
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Lara Jimenez P, Moreno M, Rey A, Lloret M, Rodríguez-Melcón J, Rodríguez-Ibarria N, Cabezón-Pons M, Carmona-Vigo R, Valenciano A, Henríquez-Hernández L. PO-0965: MVP and IGF-1R overexpression predicts clinical outcome of oral carcinoma patients treated with radiotherapy. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31083-5] [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]
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Lloret M, Henríquez-Hernández L, Valenciano A, Clavo B, Pinar B, Rey A, Federico M, Blanco J, García-Cabrera L, Lara P. EP-1808: Plasminogen activator inhibitor-1 is associated with key oncoproteins in cervical carcinoma tumors. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31926-5] [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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Uzan C, Muller E, Kane A, Rey A, Gouy S, Bendiffallah S, Duvillard P, Fauvet R, Darai E, Morice P. Prognostic factors for recurrence after conservative treatment in a series of 119 patients with stage I serous borderline tumors of the ovary. Ann Oncol 2013; 25:166-71. [PMID: 24287939 DOI: 10.1093/annonc/mdt430] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The aim of this study was to evaluate prognostic factors for recurrence after conservative treatment of a large series of 'apparent' stage I serous borderline ovarian tumors (SBOTs). PATIENTS AND METHODS A review of 119 patients treated conservatively between 2000 and 2009 with follow-up data. All pathological slides were reviewed by the same expert pathologist. Prognostic factors for recurrence were studied (age, histological subtypes and surgical procedure). RESULTS Conservative surgical procedures were: unilateral cystectomy (n = 43, 36%); unilateral adnexectomy (UA; n = 50, 42%); bilateral cystectomies (n = 11, 9%) and UA + contralateral cystectomy (n = 15, 13%). Stromal microinvasion and/or a micropapillary pattern was present in 21 (18%) and 13 (11%) patients, respectively. With a median follow-up of 45 months, 38 (32%) patients relapsed (10 also had peritoneal disease in the form of noninvasive implants at the first recurrence). In 2 of these 38 patients, progression-to-invasive disease occurred at the second and third relapse (one patient died to the recurrence). Three prognostic factors for recurrence were identified in the univariate analysis: a young age (< or >30 years old), the type of conservative treatment (adnexectomy versus cystectomy) and tumor bilaterality. In the multivariate analysis, only age remained statistically significant. CONCLUSION In this series (the largest reported, to date, on recurrences after the conservative management of stage I SBOT), the risk of relapse was not related to tumor histological subtypes (micropapillary and stromal microinvasion) nor to the use of complete staging surgery. Invasive recurrences were very rare in stage I SBOT, but did occur. A young age, tumor bilaterality and the use of a cystectomy were identified as risk factors for recurrence, suggesting that management of fertility preservation (particularly in very young patients) should be associated with a meticulously conducted follow-up.
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Affiliation(s)
- C Uzan
- Departments of Gynaecologic Surgery
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Rey A, Alforja S, Sabater N, Giralt J, Alvarez G, Adan A. [Natural history of an optic disc macroaneurysm]. Arch Soc Esp Oftalmol 2013; 89:113-6. [PMID: 24269409 DOI: 10.1016/j.oftal.2012.07.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2011] [Revised: 04/03/2012] [Accepted: 07/10/2012] [Indexed: 10/27/2022]
Abstract
CASE REPORT A 75-year old man with reduced vision in his left eye (0.05) presented with hypertensive retinopathy, retinal haemorrhages and cotton wool spots in the papillomacular bundle, as well as macular oedema. Fluorescein angiography showed a saccular hyperfluorescent lesion corresponding to arterial macroaneurysm on the optic disc, with the optical coherence tomography demonstrating macular oedema. At 2 months follow-up, vision had improved to 0.7 with spontaneous closure of the macroaneurysm and resolution of the macular oedema. DISCUSSION Arterial macroaneurysms on the optic disc are unusual and are difficult to diagnose clinically. There is no safe and effective treatment, and our case, as the few single cases reported, showed that they can spontaneously close and enable visual function to recover.
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Affiliation(s)
- A Rey
- Institut Clínic d'Oftalmologia (ICOF), Servicio de Oftalmología, Hospital Clínic, Barcelona, España.
| | - S Alforja
- Institut Clínic d'Oftalmologia (ICOF), Servicio de Oftalmología, Hospital Clínic, Barcelona, España
| | - N Sabater
- Institut Clínic d'Oftalmologia (ICOF), Servicio de Oftalmología, Hospital Clínic, Barcelona, España
| | - J Giralt
- Institut Clínic d'Oftalmologia (ICOF), Servicio de Oftalmología, Hospital Clínic, Barcelona, España
| | - G Alvarez
- Institut Clínic d'Oftalmologia (ICOF), Servicio de Oftalmología, Hospital Clínic, Barcelona, España
| | - A Adan
- Institut Clínic d'Oftalmologia (ICOF), Servicio de Oftalmología, Hospital Clínic, Barcelona, España
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Orbach D, Brennan B, Casanova M, Bergeron C, Mosseri V, Francotte N, Van Noesel M, Rey A, Bisogno G, Pierron G, Ferrari A. Paediatric and adolescent alveolar soft part sarcoma: A joint series from European cooperative groups. Pediatr Blood Cancer 2013; 60:1826-32. [PMID: 23857870 DOI: 10.1002/pbc.24683] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 06/12/2013] [Indexed: 12/26/2022]
Abstract
BACKGROUND Alveolar soft part sarcomas (ASPS) are generally chemo- and radio-resistant mesenchymal tumours, with no standardized treatment guidelines. We describe the clinical behaviour of paediatric ASPS and compare these features to previously reported adult series. PATIENTS AND METHODS The clinical data of 51 children and adolescents with ASPS, prospectively enrolled in or treated according to seven European Paediatric trials were analysed. RESULTS Median age was 13 years [range: 2-21]. Primary sites included mostly limbs (63%). IRS post-surgical staging was: IRS-I (complete resection) 35%, II (microscopic residual disease) 20%, III (gross residual disease) 18% and IV (metastases) 27%. Only 3 of the 18 evaluable patients (17%) obtained a response to conventional chemotherapy. After a median follow-up of 126 months (range: 9-240), 14/18 patients with IRS-I tumour, 10/10 IRS-II, 7/9 IRS-III and 2/14 IRS-IV were alive in remission. Sunitinib treatment achieved two very good partial responses in four patients. Ten-year overall survival (OS) and event free survival (EFS) was 78.0 ± 7% and 62.8 ± 7% respectively. Stage IV, size >5 cm and T2 tumours had a poorer outcome, but only IRS staging was an independent prognostic factor. CONCLUSIONS ASPS is a very rare tumour frequently arising in adolescents and in the extremities, and chemo resistant. Local surgical control is critical. ASPS is a poorly chemo sensitive tumour. For IRS-III/IV tumours, delayed radical local therapies including surgery are essential. Metastatic patients had a poor prognosis but targeted therapies showed promising results.
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Affiliation(s)
- D Orbach
- Department of Paediatric Oncology, Institut Curie, Paris, France
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44
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Hu H, Reven L, Rey A. First-Principles Density Functional Theory (DFT) Study of Gold Nanorod and Its Interaction with Alkanethiol Ligands. J Phys Chem B 2013; 117:12625-31. [PMID: 24083822 DOI: 10.1021/jp4028589] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Hang Hu
- Department
of Chemical Engineering, McGill University, 845 Sherbrook Street West, Montreal, Quebec, Canada, H3A 0G4
| | - Linda Reven
- Department
of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec Canada, H3A 2K6
| | - Alejandro Rey
- Department
of Chemical Engineering, McGill University, 845 Sherbrook Street West, Montreal, Quebec, Canada, H3A 0G4
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45
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Binczak M, Tournay E, Billard V, Rey A, Jayr C. Major abdominal surgery for cancer: does epidural analgesia have a long-term effect on recurrence-free and overall survival? ACTA ACUST UNITED AC 2013; 32:e81-8. [PMID: 23618609 DOI: 10.1016/j.annfar.2013.02.027] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Accepted: 02/18/2013] [Indexed: 12/14/2022]
Abstract
BACKGROUND Retrospective studies have suggested that regional analgesia combined with general anaesthesia could decrease cancer recurrence. The purpose of this study was to assess the influence of regional analgesia on recurrence-free (RFS) and overall survival in patients undergoing major intra-abdominal surgery for cancer. METHOD Patients previously included in a prospective randomized study comparing two postoperative techniques of analgesia were retrospectively studied. The EP group received general anaesthesia with bupivacaine thoracic epidural analgesia and the SC group received general anaesthesia with fentanyl followed by continuous subcutaneous morphine. RESULTS One hundred and thirty-two patients were analyzed (63 and 69 in SC and EP group, respectively) with a 17-year-median follow-up. After 5 years, RFS was 43% [95% CI: 32%-55%] in EP group and 24% [95% CI: 15%-36%] in SC group, but the difference did not reach statistical significance for RFS nor for overall survival (P=0.10 and 0.16 respectively). Using multivariable analysis over the whole follow-up period, the type of analgesia was not a statistically significant predictive factor for RFS (EP/SC, HR=1.3 [95% CI: 0.8-2.0%]). The anaesthesia effect changed moderately over the follow-up and HR for overall survival (EP/SC) reached statistical significance after 5, 6 and 8 years. CONCLUSION Despite a trend in favour of the epidural, this retrospective review of patients included in a previous randomized study failed to demonstrate a statistically significant association between the perioperative analgesia and RFS after abdominal surgery for cancer. The duration of follow-up may have an impact on the analgesia effect on survival.
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Affiliation(s)
- M Binczak
- Department of Anesthesia, Institut Gustave-Roussy, Villejuif, France
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46
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Pawel JV, Gorbounova V, Reck M, Kowalski DM, Allard A, Chadjaa M, Rey A, Bennouna J, Grossi F. DISRUPT: A randomized phase 2 trial of ombrabulin (AVE8062) combined with a taxane-platinum regimen in the first-line treatment of metastatic non-small cell lung cancer (NSCLC). Pneumologie 2013. [DOI: 10.1055/s-0033-1334708] [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: 10/27/2022]
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47
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Pautier P, Floquet A, Gladieff L, Bompas E, Ray-Coquard I, Piperno-Neumann S, Selle F, Guillemet C, Weber B, Largillier R, Bertucci F, Opinel P, Duffaud F, Reynaud-Bougnoux A, Delcambre C, Isambert N, Kerbrat P, Netter-Pinon G, Pinto N, Duvillard P, Haie-Meder C, Lhommé C, Rey A. A randomized clinical trial of adjuvant chemotherapy with doxorubicin, ifosfamide, and cisplatin followed by radiotherapy versus radiotherapy alone in patients with localized uterine sarcomas (SARCGYN study). A study of the French Sarcoma Group. Ann Oncol 2012; 24:1099-104. [PMID: 23139262 DOI: 10.1093/annonc/mds545] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND There is no proven benefit of adjuvant treatment of uterine sarcoma (US). SARCGYN phase III study compared adjuvant polychemotherapy followed by pelvic radiotherapy (RT) (arm A) versus RT alone (arm B) conducted to detect an increase ≥ 20% of 3-year PFS. METHODS Patients with FIGO stage ≤ III US, physiological age ≤ 65 years; chemotherapy: four cycles of doxorubicin 50 mg/m² d1, ifosfamide 3 g/m²/day d1-2, cisplatin 75 mg/m² d3, (API) + G-CSF q 3 weeks. Study was stopped because of lack of recruitment. RESULTS Eighty-one patients were included: 39 in arm A and 42 in arm B; 52 stage I, 16 stage II, 13 stage III; 53 leiomyosarcomas, 9 undifferenciated sarcomas, 19 carcinosarcomas. Gr 3-4 toxicity during API (/37 patients): thrombopenia (76%), febrile neutropenia (22%) with two toxic deaths; renal gr 3 (1 patient). After a median follow-up of 4.3 years, 41/81 patients recurred, 15 in arm A, 26 in arm B. The 3 years DFS is 55% in arm A, 41% in arm B (P = 0.048). The 3-year overall survival (OS) is 81% in arm A and 69% in arm B (P = 0.41). CONCLUSION API adjuvant CT statistically increases the 3 year-DFS of patients with US.
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Affiliation(s)
- P Pautier
- Department of Medical Oncology, Institut Gustave-Roussy, Villejuif, Cedex, France.
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48
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Lara PC, Lloret M, Valenciano A, Clavo B, Pinar B, Rey A, Henríquez-Hernández LA. Plasminogen activator inhibitor-1 (PAI-1) expression in relation to hypoxia and oncoproteins in clinical cervical tumors. Strahlenther Onkol 2012; 188:1139-45. [PMID: 23111469 DOI: 10.1007/s00066-012-0216-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 07/16/2012] [Indexed: 10/27/2022]
Abstract
PURPOSE Explore the role of plasminogen activator inhibitor-1 (PAI-1) in cervical cancer and its relationship to hypoxia and the expression of p53, Ku70/80, and cyclin D1. MATERIAL AND METHODS The expression of PAI-1, cyclin D1, and p53, together with tumor oxygenation, were determined in 43 consecutive patients suffering from localized cervical carcinoma. Oncoprotein expression was determined by immunohistochemistry. Tumor oxygenation was measured using a polarographic probe system, "pO2 histography." RESULTS PAI expression was considered negative in 32.6% and overexpressed in 18.6% of cases. Cyclin D1 showed a median expression of 5.0 (range 0-70). We observed a positive association between PAI expression and altered p53 (p = 0.049) and cyclin D1 (p = 0.020). An inverse association was detected between PAI and Ku70/80 expression (p = 0.042). Cyclin D1 staining increased according to tumor volume (r = 0.314, p = 0.009). We did not observe a significant association between PAI and hypoxia or other clinicopathological parameters. CONCLUSION The present results show that PAI-1 overexpression is associated with nonhomologous end-joining DNA repair down-regulation (low Ku70/80 expression) and with increased p53 and cyclin D1 expression, and they suggest that PAI-1 plays a role in the tumor behavior in cervical carcinoma.
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Affiliation(s)
- P C Lara
- Hospital Universitario de Gran Canaria Dr. Negrín, Las Palmas de Gran Canaria, Las Palmas, Spain
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Llorenç V, Rey A, Mesquida M, Pelegrín L, Adán A. [Central nervous system demyelinating disease-associated uveitis]. Arch Soc Esp Oftalmol 2012; 87:324-329. [PMID: 23021230 DOI: 10.1016/j.oftal.2012.04.027] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 08/28/2011] [Revised: 02/24/2012] [Accepted: 04/17/2012] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To describe the epidemiology, clinical features and visual prognosis in uveitis associated with demyelinating disease (DD) of the CNS. METHODS A clinical, retrospective, and descriptive study was performed. Data regarding age at presentation, gender, time from onset was recorded, as well as, type of uveitis, complications, treatment and initial and final visual acuity (BCVA) on all patients with DD-associated uveitis diagnosed in our Unit between January 2009 and June 2011. RESULTS Five women and 4 men were finally included (1.3% of 697 with uveitis). There was associated multiple sclerosis in 78% of cases. Mean age at presentation was 36.6 years for uveitis and 40 years for DD. The uveitis preceded the DD in 3 cases (33%). Typically, uveitis was bilateral (89%), chronic (89%), intermediate (89%), and associated with previous inflammation (29%), with synechiae (65%), and granulomatous (44%). The most frequent complications were cataract (71%) and macular oedema (53%). Besides local treatment, uveitis was managed with systemic steroids (78%), immunosuppressants (44%), and surgery (41% of eyes). After a mean follow up of 5 years, 47% of the eyes had a worse BCVA, among which, 12% lost ≥ 3 Snellen lines. The only patient treated with interferon (IFN), remained stable without treatment for the last 7 years. CONCLUSIONS DD-associated uveitis typically affected young adult women with intermediate-anterior uveitis of chronic, bilateral and synechiae type. Complications are common and there is a risk of visual loss, despite treatment. IFN therapy may be an effective alternative to be investigated.
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Affiliation(s)
- V Llorenç
- Hospital Clínic i Provincial de Barcelona, Institut Clínic d'Oftalmologia (ICOF), Barcelona, España.
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50
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von Pawel J, Gorbounova V, Reck M, Kowalski D, Allard A, Chadjaa M, Rey A, Bennouna J, Grossi F. Disrupt: A Randomized Phase 2 Trial of Ombrabulin (AVE8062) Combined with a Taxane-Platinum Regimen in the First-Line Treatment of Metastatic Non-Small Cell Lung Cancer (NSCLC). Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33843-6] [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] Open
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