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García-Lastra JM, Cook PL, Himpsel FJ, Rubio A. Communication: Systematic shifts of the lowest unoccupied molecular orbital peak in x-ray absorption for a series of 3d metal porphyrins. J Chem Phys 2011; 133:151103. [PMID: 20969361 DOI: 10.1063/1.3497188] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Porphyrins are widely used as dye molecules in solar cells. Knowing the energies of their frontier orbitals is crucial for optimizing the energy level structure of solar cells. We use near edge x-ray absorption fine structure (NEXAFS) spectroscopy to obtain the energy of the lowest unoccupied molecular orbital (LUMO) with respect to the N(1s) core level of the molecule. A systematic energy shift of the N(1s) to LUMO transition is found along a series of 3d metal octaethylporphyrins and explained by density functional theory. It is mainly due to a shift of the N(1s) level rather than a shift of the LUMO or a change in the electron-hole interaction of the core exciton.
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Ortiz-Estevez M, De Las Rivas J, Fontanillo C, Rubio A. Segmentation of genomic and transcriptomic microarrays data reveals major correlation between DNA copy number aberrations and gene–loci expression. Genomics 2011; 97:86-93. [DOI: 10.1016/j.ygeno.2010.10.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2010] [Revised: 10/20/2010] [Accepted: 10/22/2010] [Indexed: 11/26/2022]
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78
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Rubio A, Vivinus-Nébot M, Bourrier T, Saggio B, Albertini M, Bernard A. Benefit of the basophil activation test in deciding when to reintroduce cow's milk in allergic children. Allergy 2011; 66:92-100. [PMID: 20608919 DOI: 10.1111/j.1398-9995.2010.02432.x] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND Oral challenges are required to establish the persistence or resolution of IgE-mediated cow's milk allergy (CMA). Determining the appropriate timing for challenging is the main difficulty. The benefit of the basophil activation test (BAT) in predicting a child's reaction to the oral challenge was evaluated and compared to the specific IgE and skin prick tests' (SPT) results. METHODS One hundred and twelve consecutive children with CMA admitted for an oral challenge to reassess their allergy were included. Allergen-induced basophil activation was detected as a CD63-upregulation by flow cytometry. RESULTS Thirty-six children (32%) had a positive oral challenge. The percentage of activated basophils in patients with a positive challenge (mean = 20.9; SD = 18.8) was significantly higher than that of patients with a negative challenge (mean = 3.9; SD = 9.8, P < 0.0001), and was well correlated with the eliciting dose of cow's milk (P < 0.0001). The BAT had an efficiency of 90%, a sensitivity of 91%, a specificity of 90%, and positive and negative predictive values of 81% and 96% in detecting persistently allergic patients. The area under the ROC curve was 0.866. These scores were higher than those obtained with SPT and IgE values, whichever positivity cut-point was chosen. Referring to a decisional algorithm combining BAT, specific IgE and SPT allowed the correct identification of 94% of patients as tolerant or persistently allergic to cow's milk proteins (CMP) in our cohort. CONCLUSION The BAT could be a valuable tool in the management of paediatric CMA in addition to specific IgE quantification and SPT, by contributing in determining whether an oral challenge can safely be undertaken.
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79
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Balliu E, Boada M, Peláez I, Vilanova J, Barceló-Vidal C, Rubio A, Galofré P, Castro A, Pedraza S. Comparative study of whole-body MRI and bone scintigraphy for the detection of bone metastases. Clin Radiol 2010; 65:989-96. [DOI: 10.1016/j.crad.2010.07.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2009] [Revised: 03/16/2010] [Accepted: 07/14/2010] [Indexed: 11/30/2022]
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81
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Corso M, Verstraete MJ, Schiller F, Ormaza M, Fernández L, Greber T, Torrent M, Rubio A, Ortega JE. Rare-earth surface alloying: a new phase for GdAu2. PHYSICAL REVIEW LETTERS 2010; 105:016101. [PMID: 20867467 DOI: 10.1103/physrevlett.105.016101] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Indexed: 05/29/2023]
Abstract
Surface alloying is a powerful way of varying physical and chemical properties of metals, for a number of applications from catalysis to nuclear and green technologies. Surfaces offer many degrees of freedom, giving rise to new phases that do not have a bulk counterpart. However, the atomic characterization of distinct surface compounds is a major task, which demands powerful experimental and theoretical tools. Here we illustrate the process for the case of a GdAu2 surface phase of extraordinary crystallinity. The combined use of surface-sensitive techniques and state-of-the-art ab initio calculations disentangles its atomic and electronic properties. In particular, the stacking of the surface layers allows for gadolinium's natural ferromagnetic state, at variance with the bulk phase, where frustration leads to antiferromagnetic interlayer coupling.
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82
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Rubio A, Navalon S, Adelantado M. Determination of disinfection by-products (DBPS) in fresh chicken at retail. Toxicol Lett 2010. [DOI: 10.1016/j.toxlet.2010.03.1060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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83
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Lauron J, Rubio A, Tran A, Gual P. CL001 - Rôle de l’ostéopontine dans les lésions d’ischémie-reperfusion hépatique normothermique chez la souris. Arch Pediatr 2010. [DOI: 10.1016/s0929-693x(10)70217-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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84
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Kim Y, Abou-Hamad E, Rubio A, Wågberg T, Talyzin AV, Boesch D, Aloni S, Zettl A, Luzzi DE, Goze-Bac C. Communications: Nanomagnetic shielding: High-resolution NMR in carbon allotropes. J Chem Phys 2010; 132:021102. [DOI: 10.1063/1.3284740] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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85
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Abou-Hamad E, Kim Y, Wågberg T, Boesch D, Aloni S, Zettl A, Rubio A, Luzzi DE, Goze-Bac C. Molecular dynamics and phase transition in one-dimensional crystal of C(60) encapsulated inside single wall carbon nanotubes. ACS NANO 2009; 3:3878-3883. [PMID: 19911833 DOI: 10.1021/nn901128t] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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86
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Helbig N, Tokatly IV, Rubio A. Exact Kohn–Sham potential of strongly correlated finite systems. J Chem Phys 2009; 131:224105. [DOI: 10.1063/1.3271392] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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87
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Rubio A, Ponvert C, Goulet O, Scheinmann P, De Blic J. Allergic and nonallergic hypersensitivity reactions to silicone: a report of one case. Allergy 2009; 64:1555-1556. [PMID: 19624558 DOI: 10.1111/j.1398-9995.2009.02086.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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88
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Pérez V, Marin C, Rubio A, Aguilar E, Barbanoj M, Kulisevsky J. Effect of the additional noradrenergic neurodegeneration to 6-OHDA-lesioned rats in levodopa-induced dyskinesias and in cognitive disturbances. J Neural Transm (Vienna) 2009; 116:1257-66. [PMID: 19710996 DOI: 10.1007/s00702-009-0291-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2009] [Accepted: 07/31/2009] [Indexed: 10/20/2022]
Abstract
Parkinson's disease is a motor and cognitive disorder characterised by a progressive loss of the substantia nigra pars compacta (SNc) dopaminergic neurons as well as of the locus coeruleus (LC) noradrenergic neurons. It has been suggested that LC neurodegeneration might influence levodopa-induced motor disturbances and cognitive performance. We investigated the influence of dopaminergic and noradrenergic lesions on levodopa-induced dyskinesias and on working memory in rats. Two groups of animals were used: (1) rats with a dopaminergic lesion induced by a unilateral administration of the neurotoxin 6-hydroxydopamine (6-OHDA), and (2) rats with a combined lesion of the dopaminergic and noradrenergic systems induced by 6-OHDA and N-(2-chloroethyl)-N-ethyl-2-bromobenzylamine (DSP-4), respectively. Dyskinesias were evaluated on days 1, 8, 15 and 22 of chronic levodopa treatment (6 mg/kg, twice at day, i.p.). Working memory was evaluated by a radial-arm maze (1) before lesions, (2) before levodopa administration and (3) after 22 days of levodopa treatment. Total, axial, limb and orofacial dyskinesias not differed significantly between both groups. Working memory tasks worsened in both lesioned groups reaching significance in terms of time of performance (P < 0.05). The number of repeated entries in the same arm (errors) was only significant in the double-lesioned group (P < 0.05). This behaviour was not different from the one observed after chronic levodopa treatment. These results suggest that levodopa-induced dyskinesias in the 6-OHDA-lesioned rats were not affected by the additional noradrenergic lesion, whereas this last condition was sufficient to worse the cognitive performance deficit produced by the dopaminergic lesion.
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Lernout C, Haas H, Rubio A, Griffet J. Pediatric intervertebral disk calcification in childhood: three case reports and review of literature. Childs Nerv Syst 2009; 25:1019-23. [PMID: 19424706 DOI: 10.1007/s00381-009-0869-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2009] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Intervertebral disk calcification is a rare childhood disease. The etiology of disk calcification in children remains unclear. CASE REPORTS We report three cases of children with cervical disk calcification. Their clinical manifestations are very different. The first patient mainly had a neurological deficiency. The second had neck pain and muscular deficit of the left musculus deltoideus. The third had isolated strong neck pain. By presenting these three cases, we want to recall the different symptoms that correspond to this disease and discuss the decisions to be made in regard to radiological investigation and treatment. DISCUSSION Healing takes place spontaneously after several days, and the calcifications disappears after about 6 months after a stage of fragmentation. Conservative treatment by immobilization of the spine and analgesic therapy are sufficient. Operative treatment should be reserved for severe radicular pain or for significant and persistent sensorimotor deficits from either root or spinal cord compression.
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90
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Moy T, Conrad M, Rubio A, Silverman J, Nguyen K. P24 Characterization of the lysylphosphatidylglycerol synthetase MprF, an enzyme associated with reduced susceptibility to daptomycin. Int J Antimicrob Agents 2009. [DOI: 10.1016/s0924-8579(09)70243-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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91
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Spallanzani N, Rozzi CA, Varsano D, Baruah T, Pederson MR, Manghi F, Rubio A. Photoexcitation of a light-harvesting supramolecular triad: a time-dependent DFT study. J Phys Chem B 2009; 113:5345-9. [PMID: 19331406 DOI: 10.1021/jp900820q] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We present the first time-dependent density functional theory (TDDFT) calculation on a light-harvesting triad carotenoid-diaryl-porphyrin-C(60). Besides the numerical challenge that the ab initio study of the electronic structure of such a large system presents, we show that TDDFT is able to provide an accurate description of the excited-state properties of the system. In particular, we calculate the photoabsorption spectrum of the supramolecular assembly, and we provide an interpretation of the photoexcitation mechanism in terms of the properties of the component moieties. The spectrum is in good agreement with experimental data, and provides useful insight on the photoinduced charge-transfer mechanism which characterizes the system.
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d’Ollonne T, Rubio A, Leroux J, Lusakisimo S, Hayek T, Griffet J. Early reduction versus skin traction in the orthopaedic treatment of femoral shaft fractures in children under 6 years old. J Child Orthop 2009; 3:209-15. [PMID: 19437059 PMCID: PMC2686814 DOI: 10.1007/s11832-009-0174-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2008] [Accepted: 04/07/2009] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Femoral shaft fractures occur very frequently in children, and their prognosis usually is good. Nonoperative treatment is the gold standard for children under 6 years because of the excellent bony union and the remodelling qualities. PURPOSE The aim of this study was to compare two orthopaedic therapeutic methods: skin traction versus immediate reduction. MATERIALS AND METHODS The study involved 35 children, divided into two groups: in group 1, treatment consisted of skin traction for 21 days followed by hip spica casting; in group 2, an immediate reduction with early hip spica casting was performed. The ranges of motion, the delay before weight bearing, the hospitalisation duration and the required amount of painkillers were recorded. We compared initial shortening, axial, sagittal and rotational alignment, and femoral length discrepancy. We calculated the injured femoral diaphysal overgrowth and correlated it to the fracture type and location and to the initial shortening. Economical variables were also studied. RESULTS The mean overgrowth was 8.9 mm in group 1 and 8.5 mm in group 2. Three years after the trauma, length discrepancy was 4 mm in group 1 and 1 mm in group 2. Hip spica casting leads to significant reductions in weight-bearing delay, hospitalisation duration and pain. The cost of treatment with skin traction was four times higher (24,472 euros) than that of immediate reduction (6,384 euros). DISCUSSION Our results are in accordance with the literature. The femoral overgrowth was proportional to the initial shortening. Masculine gender, an oblique fracture and injury of the lower third of the femur were associated with the greatest femoral overgrowth. During the first year of follow-up, the femoral length discrepancy hardly varied after immediate reduction (4 mm), whereas the overgrowth reached 6 mm after skin traction. Overall, immediate hip spica casting leads to significant reductions in weight-bearing delay, hospitalisation duration, complications and costs, while having similar clinical results as traction.
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93
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Lardone PJ, Carrillo-Vico A, Molinero P, Rubio A, Guerrero JM. A novel interplay between membrane and nuclear melatonin receptors in human lymphocytes: significance in IL-2 production. Cell Mol Life Sci 2009; 66:516-25. [PMID: 19099187 PMCID: PMC11131464 DOI: 10.1007/s00018-008-8601-5] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Human lymphocyte melatonin, through membrane and nuclear receptors binding, acts as an activator in IL-2 production. Antagonism of membrane melatonin receptors using luzindole exacerbates the drop of the IL-2 production induced by PGE(2) in peripheral blood mononuclear and Jurkat cells. This paper studies the melatonin membrane and nuclear receptors interplay in PGE(2)-diminished IL-2 production. The decrease in IL-2 production after PGE(2) and/or luzindole administration correlated with downregulation in the nuclear receptor RORalpha. We also highlighted a role of cAMP in the pathway, because forskolin mimicked the effects of luzindole and/or PGE(2) in the RORalpha expression. Finally, a significant RORalpha downregulation was observed in T cells permanently transfected with inducible MT(1) antisense. In conclusion, we show a novel connection between melatonin membrane receptor signalling and RORalpha expression, opening a new way to understand melatonin regulation in lymphocyte physiology.
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Monpoux F, Huguon E, Truchi R, Rubio A, Riolo V, Deville A, Boutte P, Tran A. Transient elastography (Fibroscan) in HIV-1 vertically infected children. A cross-sectional study. Retrovirology 2009. [DOI: 10.1186/1742-4690-6-s1-p13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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95
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Schimmer C, Reents W, Berneder S, Eigel P, Sezer O, Scheld HH, Sahraoui K, Gansera B, Deppert O, Rubio A, Feyrer R, Elert O, Leyh RG. Prevention of sternal dehiscence and infection in high-risk patients: A prospective randomised multicenter trial. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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96
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Jimena I, Tasset I, Lopez-Martos R, Rubio A, Luque E, Montilla P, Pena J, Tunez I. Effects of Magnetic Stimulation on Oxidative Stress and Skeletal Muscle Regeneration Induced by Mepivacaine in Rat. Med Chem 2009; 5:44-9. [DOI: 10.2174/157340609787049217] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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97
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Flexas MM, Boyer DL, Espino M, Puigdefàbregas J, Rubio A, Company JB. Circulation over a submarine canyon in the NW Mediterranean. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2006jc003998] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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98
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Alonso JL, Andrade X, Echenique P, Falceto F, Prada-Gracia D, Rubio A. Efficient formalism for large-scale ab initio molecular dynamics based on time-dependent density functional theory. PHYSICAL REVIEW LETTERS 2008; 101:096403. [PMID: 18851630 DOI: 10.1103/physrevlett.101.096403] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2007] [Indexed: 05/26/2023]
Abstract
A new "on the fly" method to perform Born-Oppenheimer ab initio molecular dynamics (AIMD) simulations is presented. Inspired by Ehrenfest dynamics in time-dependent density functional theory, the electronic orbitals are evolved by a Schrödinger-like equation, where the orbital time derivative is multiplied by a parameter. This parameter controls the time scale of the fictitious electronic motion and speeds up the calculations with respect to standard Ehrenfest dynamics. In contrast with other methods, wave function orthogonality needs not be imposed as it is automatically preserved, which is of paramount relevance for large-scale AIMD simulations.
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Lozares S, Pellejero S, Miquelez S, Mañeru F, Martin M, Bragado L, Soto P, Rubio A. SU-GG-T-237: Quality Assurance of TPS, Based On ‘Code of Practice for Quality Control of Treatment Planning Systems in Radiation Therapy’ by SEFM (Spanish Medical Physics Association). Med Phys 2008. [DOI: 10.1118/1.2961989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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100
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Ayuela A, Dolado JS, Campillo I, de Miguel YR, Erkizia E, Sánchez-Portal D, Rubio A, Porro A, Echenique PM. Silicate chain formation in the nanostructure of cement-based materials. J Chem Phys 2008; 127:164710. [PMID: 17979374 DOI: 10.1063/1.2796171] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Cement-based materials are ubiquitous in almost all built environment. In spite of this, little is known about the formation and the role played by the silicate chains always present in the cement nanostructure. By means of first principles simulations we provide compelling evidence on the pivotal role played by certain ionic species in the formation of the silicate chains inside the cementitious matrix. Moreover, we corroborate the experimental evidence which shows that the length of the most stable chains with m Si atoms follows a magic-number sequence: m = 3n-1 with n = 1,2,... Our results have been applied in the development of new higher performance cement-based materials by adding nanosilica.
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