151
|
Izbicka E, Diaz A, Streeper R, Wick M, Campos D, Steffen R, Saunders M. Distinct mechanistic activity profile of pralatrexate in comparison to other antifolates in in vitro and in vivo models of human cancers. Cancer Chemother Pharmacol 2009; 64:993-9. [PMID: 19221750 PMCID: PMC2728224 DOI: 10.1007/s00280-009-0954-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Accepted: 12/26/2008] [Indexed: 11/27/2022]
Abstract
PURPOSE This study evaluated mechanistic differences of pralatrexate, methotrexate, and pemetrexed. METHODS Inhibition of dihydrofolate reductase (DHFR) was quantified using recombinant human DHFR. Cellular uptake and folylpolyglutamate synthetase (FPGS) activity were determined using radiolabeled pralatrexate, methotrexate, and pemetrexed in NCI-H460 non-small cell lung cancer (NSCLC) cells. The tumor growth inhibition (TGI) was assessed using MV522 and NCI-H460 human NSCLC xenografts. RESULTS Apparent K ( i ) values for DHFR inhibition were 45, 26, and >200 nM for pralatrexate, methotrexate, and pemetrexed, respectively. A significantly greater percentage of radiolabeled pralatrexate entered the cells and was polyglutamylatated relative to methotrexate or pemetrexed. In vivo, pralatrexate showed superior anti-tumor activity in both NSCLC models, with more effective dose-dependent TGI in the more rapidly growing NCI-H460 xenografts. CONCLUSIONS Pralatrexate demonstrated a distinct mechanistic and anti-tumor activity profile relative to methotrexate and pemetrexed. Pralatrexate exhibited enhanced cellular uptake and increased polyglutamylation, which correlated with increased TGI in NSCLC xenograft models.
Collapse
|
152
|
Diaz A, Green I, Keith S. Restoration in the Face of Climate Change: A Case Study from the Dorset Heaths. ECOL RESTOR 2009. [DOI: 10.3368/er.27.3.257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
153
|
Liu Y, Diaz A, Papanicolaou N. TREATMENT PLANNING EVALUATION OF BRAIN TUMOR USING MONTE CARLO IMPLANTED NEUTRON BRACHYTHERAPY AND COMPARED WITH PHOTON IMRT. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(12)73179-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
154
|
Heimbach L, Li N, Diaz A, Liu Z. Experimental animal models of bullous pemphigoid. GIORN ITAL DERMAT V 2009; 144:423-431. [PMID: 19755945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Bullous pemphigoid (BP) is a cutaneous autoimmune blistering disease characterized immunohistologically by dermal-epidermal junction separation, an inflammatory cell infiltrate in the upper dermis, and autoantibodies directed against the hemidesmosomal proteins BP230 and BP180. A passive transfer mouse model of BP that uses rabbit antibodies targeted against murine BP180 reproduces the key clinical and histological features of human BP. Using this model, it has been demonstrated that subepidermal blistering is initiated by anti-BP180 antibodies and mediated by complement activation, mast cell degranulation, neutrophil infiltration, and proteinase secretion. The rabbit-anti mouse IgG passive transfer model is not compatible with study of human pathogenic antibodies, as the human and murine antigenic epitopes are not cross-reactive. Two humanized mouse models in which the murine form of BP180 is replaced the human homologue have recently emerged. Autoantibodies isolated from human patients induce experimental BP in the humanized mice, and disease progression mirrors that observed in the rabbit-anti mouse IgG model. The humanized mouse models present ideal in vivo systems to test novel therapeutic strategies for disease management. In this review, we discuss the progress made in understanding the pathogenesis of BP, as well as the limits of using animal models to investigate human disease.
Collapse
|
155
|
Massingill B, Liu Y, Diaz A, Esquivel C, Papanikolaou N. SU-FF-T-435: Dosimetry Performance Comparison of Proton IMPT Versus Photon IMRT for Ocular Tumors Using Monte Carlo Simulation and Pinnacle3® TPS. Med Phys 2009. [DOI: 10.1118/1.3181917] [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
|
156
|
Diaz A, Liu Y, Shi C, Papanikolaou N. WE-D-BRB-04: An Evaluation Study of Treatment Planning of Brain Tumor Using Implanted Neutron Brachytherapy and Compared with Photon IMRT. Med Phys 2009. [DOI: 10.1118/1.3182518] [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
|
157
|
Galve E, Sambola A, Saldana G, Quispe I, Nieto E, Diaz A, Evangelista A, Candell-Riera J. Late benefits of dual-chamber pacing in obstructive hypertrophic cardiomyopathy: a 10-year follow-up study. Heart 2009; 96:352-6. [DOI: 10.1136/hrt.2008.158915] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
|
158
|
Izbicka E, Streeper R, Diaz A, Campos D, Baek S, Mussman R, Long T. 80P MULTIPLEX IMMUNOASSAY ASSAY ANALYSIS OF DIFFERENTIALLY EXPRESSED BIOMARKERS OF NON-SMALL CELL LUNG CANCER. Lung Cancer 2009. [DOI: 10.1016/s0169-5002(09)70203-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
159
|
Streeper R, Mussman R, Campos D, Diaz A, Baek S, Long T, Izbicka E. 79P MASS SPECTROMETRIC IDENTIFICATION OF NOVEL PROTEOMIC BIOMARKERS OF NON-SMALL CELL LUNG CANCER. Lung Cancer 2009. [DOI: 10.1016/s0169-5002(09)70202-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
160
|
Sarkar V, Shi C, Rassiah-Szegedi P, Eng T, Diaz A, Papanikolaou N. A feasibility study on the use of digital tomosynthesis with individually-acquired megavoltage portal images for target localization. JOURNAL OF B.U.ON. : OFFICIAL JOURNAL OF THE BALKAN UNION OF ONCOLOGY 2009; 14:103-108. [PMID: 19365878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
PURPOSE To determine the feasibility of using megavoltage (MV) images and digital tomosynthesis to determine the three dimensional (3D) localization of different objects. MATERIALS AND METHODS Different phantom geometries were imaged using an electronic portal imaging device and digital tomosynthesis was used to reconstruct tomograms. These were compared with corresponding computed tomography (CT) images. RESULTS While in-plane resolution of the tomograms was comparable as that of the CT images, definite out-of-plane (depth) localization was restricted to 5 mm. CONCLUSION The results confirm that it is possible to perform 3D localization of objects by using digital tomosynthesis for volumetric reconstructions from individually-acquired MV-quality portal images.
Collapse
|
161
|
Negro Calduch E, Diaz A, Diez M, for the project "Impact of migratio C. Ethical and legal issues related to health access for migrant populations in the Euro-Mediterranean Area. Euro Surveill 2008; 13. [DOI: 10.2807/ese.13.50.19061-en] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
162
|
Nygård K, Satapathy DK, Bunk O, Diaz A, Perret E, Buitenhuis J, Pfeiffer F, David C, van der Veen F. Structure of confined fluids by x-ray interferometry using diffraction gratings. OPTICS EXPRESS 2008; 16:20522-20529. [PMID: 19065191 DOI: 10.1364/oe.16.020522] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We develop a novel method for structure determination of confined fluids using diffraction-grating-based x-ray interferometry.Within this approach, diffraction from a microfluidic array, which acts both as confinement and transmission diffraction grating, provides the reference wave, whereas the density modulations of the confined fluid, acting as a weak phase object, generate the object wave. The ensemble-averaged density profile of the fluid perpendicular to the confining channel is then unambiguously obtained from the interference between the reference and object waves by direct Fourier inversion.
Collapse
|
163
|
Rosety-Rodriguez M, Rosety I, Fornieles-Gonzalez G, Diaz A, Rosety M, Ordonez FJ. A 12-week aerobic training programme reduced plasmatic allantoin in adolescents with Down syndrome. Br J Sports Med 2008; 44:685-7. [DOI: 10.1136/bjsm.2008.052530] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
164
|
Diaz A, Munguia O, Fariña J, Llabrés M. Lactoyl-Lactic Acid Determination of Dl-Lactide as Starting Material in the Synthesis of Polylactic Acid. Drug Dev Ind Pharm 2008. [DOI: 10.3109/03639049509069259] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
165
|
Satapathy DK, Bunk O, Jefimovs K, Nygård K, Guo H, Diaz A, Perret E, Pfeiffer F, David C, Wegdam GH, van der Veen JF. Colloidal monolayer trapped near a charged wall: a synchrotron x-ray diffraction study. PHYSICAL REVIEW LETTERS 2008; 101:136103. [PMID: 18851466 DOI: 10.1103/physrevlett.101.136103] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2008] [Indexed: 05/26/2023]
Abstract
Using x-ray diffraction from microfluidic channel arrays, we have determined concentration profiles of charge-stabilized silica colloids (radius 60+/-2 nm) confined between two like-charged dielectric walls at a few hundred nanometer distance. In solutions of very low ionic strength, strongly repulsive Coulomb interactions drive the colloids toward the central region between the walls. The addition of a small quantity of salt ions (0.2 mM) causes a dense colloidal monolayer to be trapped near the walls.
Collapse
|
166
|
Mocuta C, Metzger H, Mundboth K, Krause B, Stangl J, Bauer G, Deneke C, Schmidt O, Diaz A, Malachias A. X-ray scattering on nanostructures: from ensemble average to single object properties. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308099716] [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
|
167
|
Giantsoudi D, Liu Y, Diaz A, Mavroidis P, Papanikolaou N. SU-GG-T-12: Neutron Energy and Dose Considerations of Cf-252 Brachytherapy Sources for Various Geometries. Med Phys 2008. [DOI: 10.1118/1.2961762] [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
|
168
|
Rosety I, Rosety M, Ordonez F, Frias L, Macias-Amat I, Rosety J, Diaz A, Rosety M, Gomez F, Rosety-Rodriguez M. PLASMATIC ADIPONECTIN WAS IMPROVED BY EXERCISE IN FEMALE YOUNG ADULTS WITH METABOLIC SYNDROME. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70536-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
169
|
Ordonez F, Rosety M, Rosety I, Bernardi M, Diaz A, Rosety M, Rosety-Rodriguez M. A 6-WEEK PROTOCOL BASED ON EXERCISE AND SUPPLEMENTATION IMPROVED TOTAL ANTIOXIDANT STATUS IN ATHLETES WITH MENTAL RETARDATION FROM SPECIAL OLYMPICS. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70397-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
170
|
Diaz A, Jung C. Analytic perturbative classification and assignment of eigenstates of algebraic vibrational Hamiltonians. Mol Phys 2008. [DOI: 10.1080/00268970801961021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
171
|
Barrera R, Amador M, Diaz A, Smith J, Munoz-Jordan JL, Rosario Y. Unusual productivity of Aedes aegypti in septic tanks and its implications for dengue control. MEDICAL AND VETERINARY ENTOMOLOGY 2008; 22:62-9. [PMID: 18380655 DOI: 10.1111/j.1365-2915.2008.00720.x] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Increased DEN-2 virus transmission in Puerto Rico during 2005 prompted the implementation of a rapid intervention programme to suppress Aedes aegypti (L.) (Diptera: Culicidae) emergence, which in turn lead to the discovery of previously unknown breeding sites underground. Initially, the following control measures were applied in Playa/Playita (PP), a town of 1,400 households, to all areas where the number of pupae per person exceeded the expected threshold for dengue transmission; all containers likely to be aquatic habitats were turned over and containers too large to turn were treated with 1 p.p.m. methoprene. The impact of these interventions was evaluated by comparing the number of resting adult mosquitoes (by backpack aspiration and sweepnetting in bedrooms) pre-intervention, with numbers at 3 and 5 weeks post-intervention, and by evaluating pupal density at 4 weeks post-intervention in PP and in a nearby town, Coqui (CO; 1500 households), which was not treated. The pre-intervention and post-intervention densities of resting Ae. aegypti adults were significantly larger in the intervention town, although the density of pupae in surface containers was low and similar in both towns at 4 weeks post-intervention. At 3 weeks post-intervention, the density of resting adults decreased by only 18% of pre-intervention levels, but returned to pre-intervention levels 5 weeks after treatment. By contrast, the density of resting adults in CO steadily decreased to 48% and 61%, at 3 and 5 weeks after the initial surveys, respectively. Geographical Information Systems identified significant clustering of adult mosquitoes, which led to the discovery of underground aquatic habitats (septic tanks) that were producing large numbers of Ae. aegypti and Culex quinquefasciatus (Say) in the treated town. We calculated that septic tanks could produce > 18 000 Ae. aegypti and approximately 170 000 Cx quinquefasciatus adults per day. Septic tanks are likely to be common and widespread in suburban and rural Puerto Rico, where, apparently, they can contribute significantly to the maintenance of island-wide dengue virus endemicity.
Collapse
|
172
|
Diez M, Diaz A, Bleda MJ, Aldamiz M, Camafort M, Camino X, Cepeda C, Costa A, Ferrero O, Geijo P, Iribarren JA, Moreno S, Moreno ME, Labarga P, Pinilla J, Portu J, Pulido F, Rosa C, Santamaria JM, Telenti M, Trapiella L, Trastoy M, Viciana P. Prevalence of M. tuberculosis infection and tuberculosis disease among HIV-infected people in Spain. Int J Tuberc Lung Dis 2007; 11:1196-1202. [PMID: 17958981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023] Open
Abstract
OBJECTIVE To study the prevalence of Mycobacterium tuberculosis infection (MTBI) and past/current tuberculosis (TB) among human immunodeficiency virus (HIV) infected persons in Spain. DESIGN Longitudinal study conducted between 2000 and 2003 at 10 HIV hospital-based clinics. Data were drawn from clinical records. Associations were measured using odds ratios (ORs) and their 95% confidence intervals (95%CI). RESULTS Of the 1242 persons who met the eligibility criteria, most were male (75%), aged <40 years (75%) and unemployed (40%). HIV infection occurred through intravenous drug use (53%), heterosexual sex (29%) and sex between men (16%). In the initial evaluation, 315 subjects had evidence of MTBI: 84 (6.8%) had a history of TB, 23 (1.8%) current TB and 208 (16.8%) latent tuberculosis infection (LTBI). MTBI was associated with male sex, age 30-49 years, contact with a TB case, homelessness, poor education, and negatively with CD4 <100 cells/mm(3). Among subjects with MTBI, past/current TB was associated with retirement/disability (OR 6, 95%CI 1.6-22.5), CD4 <200 cells/mm(3) (OR 9.7, 95%CI 3.8-24.6), viral load >55,000 copies (OR 5.3, 95%CI 1.4-20.0), and negatively, with skilled work (OR 0.4, 95%CI 0.1-1.0) or administrative/managerial/professional work (OR 0.05, 95%CI 0.01-0.4). CONCLUSION Social context has an impact on the effectiveness of HIV and TB control programmes even in industrialised countries with free access to health care.
Collapse
|
173
|
Newton A, Stewart G, Diaz A, Golicher D, Pullin A. Bayesian Belief Networks as a tool for evidence-based conservation management. J Nat Conserv 2007. [DOI: 10.1016/j.jnc.2007.03.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
174
|
Diaz A, Prado M, Roa LM, Reina-Tosina J, Sanchez G. Preliminary evaluation of a full-time falling monitor for the elderly. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2007; 2004:2180-3. [PMID: 17272157 DOI: 10.1109/iembs.2004.1403637] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The article presents the early outcomes of the evaluation of an intelligent accelerometer unit (IAU) utilized for detecting the falling events of elderly people . The overall design of the monitor where the IAU is integrated is briefly exposed. The outcomes of a laboratory study carried out over 8 volunteers show that the device is able to distinguish true falling events from normal activities like fast walking or going up/downstairs. The influences of the subject and the environment have been taken into account profiting from the processing capacity of the monitor distributed architecture.
Collapse
|
175
|
Khoo IC, Werner DH, Liang X, Diaz A, Weiner B. Nanosphere dispersed liquid crystals for tunable negative-zero-positive index of refraction in the optical and terahertz regimes. OPTICS LETTERS 2006; 31:2592-4. [PMID: 16902629 DOI: 10.1364/ol.31.002592] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
An analysis of aligned nematic liquid crystal cells containing core-shell nanospheres shows that it is possible to devise a new type of metamaterial whose index of refraction is tunable from negative, through zero, to positive values. The design parameters for the constituents can be scaled for application in the optical as well as very long wavelength (e.g., terahertz and microwave) regions.
Collapse
|
176
|
Diaz A, Hughes S, Putman R, Mogg R, Bond JM. A genetic study of sika (Cervus nippon) in the New Forest and in the Purbeck region, southern England: is there evidence of recent or past hybridization with red deer (Cervus elaphus)? J Zool (1987) 2006. [DOI: 10.1111/j.1469-7998.2006.00130.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
177
|
Turner ND, Diaz A, Taddeo SS, Vanamala J, McDonough CM, Dykes L, Murphy ME, Carroll RJ, Rooney LW. Bran from black or brown sorghum suppresses colon carcinogenesis. FASEB J 2006. [DOI: 10.1096/fasebj.20.4.a599-c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
178
|
Zlotowski P, Gimeno EJ, Diaz A, Barros R, Barros SS, Cruz CEF, Driemeier D. Lectin-histochemistry: glycogenosis in cattle. Vet Res Commun 2006; 30:369-77. [PMID: 16502105 DOI: 10.1007/s11259-006-3237-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/06/2004] [Indexed: 10/25/2022]
Abstract
Ten out of 47 calves that were born in a small Brahman herd from southern Brazil developed progressive muscular weakness and tremors, lethargy and poor body condition. Necropsy was performed on three affected animals. The only gross lesion detected was paleness of the muscles of the trunk and limbs. Multiple cytoplasm vacuoles located in different tissues were the principal microscopic lesions. Vacuoles were particularly evident in skeletal muscles and myocardium. PAS-positive granules were numerous in skeletal muscle fibres and Purkinje fibres of the myocardium, but were also observed in the neurons of the brain and spinal cord, and in the vascular smooth muscle fibres from all the examined tissues. Pretreatment with diastase completely abolished the PAS reactivity. The vacuoles reacted strongly to Griffonia simplicifolia II and Concanavalia ensiformes lectins, whose biding pattern has been reported as useful for demonstration of glycogen. Examination of the electron micrographs revealed that glycogen was free within the cytoplasm or accumulated in membrane-bound granules of several tissues, especially in striated muscle, liver and neurons of the CNS. These findings were consistent with generalized glycogenosis.
Collapse
|
179
|
Diaz A, Mottram NJ, McKay G. Theoretical model of the transition between C1 and C2 chevron structures in smectic liquid crystals. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2005; 18:231-7. [PMID: 16237490 DOI: 10.1140/epje/i2005-10041-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2005] [Accepted: 08/29/2005] [Indexed: 05/04/2023]
Abstract
We present a study of the effect of weak anchoring on the transition between C1 and C2 chevron structures in smectic-C liquid crystals. The coexistence of C1 and C2 chevron structures within a single cell causes zigzag defects to occur and may affect the optical characteristics of the cell. By standard Euler-Lagrange minimisation of the total energy of the system, we obtain analytical expressions for the equilibrium director cone angle in the two chevron states. These in turn allow us to compare the total energies of the states and determine the globally stable chevron profile. We show that analytical predictions for the critical transition temperature, which depends on anchoring strength and pretilt angle, are in good agreement with those obtained numerically.
Collapse
|
180
|
Fox W, Berkey B, Michalski J, Purdy J, Simpson J, Kresl J, Curran J, Diaz A, Mehta M, Movsas B. Health-Related Quality of Life and Cognitive Status in Patients with Glioblastoma Multiforme Receiving Escalating Doses of Conformal Three-Dimensional Radiation on RTOG 9803. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.134] [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]
|
181
|
Suau R, Cabezudo B, Valpuesta M, Posadas N, Diaz A, Torres G. Identification and quantification of isoquinoline alkaloids in the genus Sarcocapnos by GC-MS. PHYTOCHEMICAL ANALYSIS : PCA 2005; 16:322-7. [PMID: 16223088 DOI: 10.1002/pca.851] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Six cularine alkaloids, cularicine, O-methylcularicine, celtisine, cularidine, cularine and celtine, three isocularine alkaloids, sarcophylline, sarcocapnine and sarcocapnidine, and five non-cularine alkaloids, glaucine, protopine, ribasine, dihydrosanguinarine and chelidonine, were identified and quantified by GC-MS in nine taxa of the genus Sarcocapnos (Fumariaceae). The chemotaxonomic significance of the results is discussed.
Collapse
|
182
|
Keymeulen HR, Lackner T, Diaz A, Patterson BD, van der Veen JF. X-ray diffraction method for the investigation of contacts between solid surfaces. JOURNAL OF SYNCHROTRON RADIATION 2005; 12:484-7. [PMID: 15968126 DOI: 10.1107/s090904950501215x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2004] [Accepted: 04/19/2005] [Indexed: 05/03/2023]
Abstract
A coherent X-ray scattering method for investigating the formation of the contact region between two solid surfaces is presented. Diffraction of X-rays from two crossed cylindrical quartz surfaces, coated with Cr and TiO(2), revealed a total contact area of 90 +/- 10 microm. In the so-called Hertz model for two surfaces in non-adhesive contact, this value is directly related to the displacement of the surfaces and the applied external force. Values of 40 +/- 3 nm for the displacement and 24 +/- 3 mN for the force are found. The method is also useful for studying liquids in confinement.
Collapse
|
183
|
Pfeiffer F, Bunk O, Schulze-Briese C, Diaz A, Weitkamp T, David C, van der Veen JF, Vartanyants I, Robinson IK. Shearing interferometer for quantifying the coherence of hard x-ray beams. PHYSICAL REVIEW LETTERS 2005; 94:164801. [PMID: 15904233 DOI: 10.1103/physrevlett.94.164801] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2005] [Indexed: 05/02/2023]
Abstract
We report a quantitative measurement of the full transverse coherence function of the 14.4 keV x-ray radiation produced by an undulator at the Swiss Light Source. An x-ray grating interferometer consisting of a beam splitter phase grating and an analyzer amplitude grating has been used to measure the degree of coherence as a function of the beam separation out to 30 microm. Importantly, the technique provides a model-free and spatially resolved measurement of the complex coherence function and is not restricted to high resolution detectors and small fields of view. The spatial characterization of the wave front has important applications in discovering localized defects in beam line optics.
Collapse
|
184
|
Rodriguez J, Marrrique J, Diaz A, Gavira J, Orbe J, Errasti P, Paramo J. W03-O-003 Effect of folic acid and vitamin B12 on endothelial function, oxidative stress and prothrombotic factors after renal transplantation. ATHEROSCLEROSIS SUPP 2005. [DOI: 10.1016/s1567-5688(05)80047-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
185
|
Tibbett M, Diaz A. Are Sulfurous Soil Amendments (S0, Fe(II)SO4, Fe(III)SO4) an Effective Tool in the Restoration of Heathland and Acidic Grassland after Four Decades of Rock Phosphate Fertilization? Restor Ecol 2005. [DOI: 10.1111/j.1526-100x.2005.00010.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
186
|
Diaz A, Martin-Raymondi D, Barba J. Complete aortic dissection demonstrated by intraoperative transoesophageal echocardiography. Heart 2004; 91:101. [PMID: 15604351 PMCID: PMC1768643 DOI: 10.1136/hrt.2004.036194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
187
|
Soto J, Arana BA, Toledo J, Rizzo N, Vega JC, Diaz A, Luz M, Gutierrez P, Arboleda M, Berman JD, Junge K, Engel J, Sindermann H. Miltefosine for New World Cutaneous Leishmaniasis. Clin Infect Dis 2004; 38:1266-72. [PMID: 15127339 DOI: 10.1086/383321] [Citation(s) in RCA: 264] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2003] [Accepted: 01/04/2004] [Indexed: 11/03/2022] Open
Abstract
The oral agent miltefosine has demonstrated a >95% cure rate in Indian visceral leishmaniasis. We performed a large, placebo-controlled study of miltefosine therapy (2.5 mg/kg per day orally for 28 days) against cutaneous leishmaniasis in Colombia and Guatemala. In regions in Colombia where Leishmania vianna panamensis is common, the per-protocol cure rates for miltefosine and placebo were 91% (40 of 44 patients) and 38% (9 of 24). These values are similar to historic values for the antimony standard of care and placebo. In regions in Guatemala where L. v. braziliensis and L. mexicana mexicana are common, the per-protocol cure rates were 53% (20 of 38) for miltefosine and 21% (4 of 19) for placebo. The miltefosine rate was lower than historic antimony cure rates of >90%. Miltefosine was well tolerated. Miltefosine is a useful oral agent against cutaneous leishmaniasis due to L. v. panamensis in Colombia but not against leishmaniasis due to L. v. braziliensis in Guatemala.
Collapse
|
188
|
Alfonso R, Romero RE, Diaz A, Calderon MN, Urdaneta G, Arce J, Patarroyo ME, Patarroyo MA. Isolation and identification of mycobacteria in New World primates maintained in captivity. Vet Microbiol 2004; 98:285-95. [PMID: 15036537 DOI: 10.1016/j.vetmic.2003.10.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2003] [Revised: 10/14/2003] [Accepted: 10/28/2003] [Indexed: 10/26/2022]
Abstract
The presence of several Mycobacterium species was determined in 68 New World monkeys kept captive in the Cali Zoo. One hundred and thirty-three gastric lavage and blood samples were evaluated for mycobacterial presence by Ziehl-Neelsen (ZN) staining, culture and PCR amplification of the Mycobacterium tuberculosis Mtp40 species-specific gene. Mycobacteria other than tuberculosis (MOTT) were identified by PCR restriction fragment length polymorphism (RFLP). Different species of mycobacteria were detected in 65% of the primate population studied by Alpha Antigen PCR. Eleven percent were positive for Mtp40 PCR amplification, being diagnosed as having M. tuberculosis, and acid-fast bacilli were observed in 23% by ZN staining. MOTT were isolated from samples taken from 37 primates by culturing; according to the RFLP analysis, three strains were classified as belonging to the MAISS complex (Mycobacterium avium-intracellulare-scrofulaceum-simiae) and eight more, isolated from soil inside the cages, were categorized as environmental contaminants. Mycobacterium spp. were detected in 13 different New World primate species showing that PCR amplification of the Mtp40 gene is a better tool than culture for M. tuberculosis detection in captive animals and that RFLP is a useful technique for MOTT identification.
Collapse
|
189
|
Khoo IC, Chen K, Diaz A. All-optical neural-net-like image processing with photosensitive nonlinear nematic film. OPTICS LETTERS 2003; 28:2372-2374. [PMID: 14680186 DOI: 10.1364/ol.28.002372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Received June 30, 2003 We demonstrate that some neural-net image-processing operations can be realized in an all-optical manner by use of the natural diffraction property of light in conjunction with the photosensitivity and optical nonlinearities of a transparent thin film. An example of image edge enhancement is illustrated with photosensitive supranonlinear nematic liquid-crystal films.
Collapse
|
190
|
Diaz A, Porhiel V, Sabatier P, Taha S, Ragragui O, Comoy J, Leriche B. [Tophaceous gout of the cervical spine, causing cord compression. Case report and review of the literature]. Neurochirurgie 2003; 49:600-4. [PMID: 14735005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Abstract
We present the case of a 74-year-old patient with long-standing gout who developed C4-C5 tophaceous gout causing cord compression. The patient had undergone 4 years earlier for a disco-osteophytic cord compression (anterior C4-C5 and C5-C6 discectomy). When admitted, the patient presented quadriparesia which had developed during the previous week in association with acute tophaceous gout on the knees, and the metarsophalangeal articulations, in the context of a bronchial infection. The diagnosis of spondylodiscitis was initially retained because of the clinical features of severe infection and the radiological data (C4-C5 cord compression, with anterior epidural lesions in MRI). The intervention allowed decompression and pathological diagnosis of tophaceous gout. Spinal gout is well-known, and very rarely responsible for cord compression: only 15 cases of cervical gout have been described in the literature. Radiological findings are not specific, and treatment is surgical in the event of medullar compression despite medical treatment.
Collapse
|
191
|
Doe KK, Diaz A, Taha S, Lerich B, Lapierre F. [Cervical medullary metastasis in a patient with Von Hippel-Lindau disease]. Neurochirurgie 2003; 49:536-9. [PMID: 14646819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
Von Hippel-Lindau disease is an autosomal dominant disorder mainly characterized by hemangioblastoma(s) associated with kidney clear-cell carcinoma. Hemangioblastoma represents 2 to 3% of all central nervous system tumors whereas extramedullary metastasis accounts for 30 to 50% of all intravertebral column tumors. The most common sites of metastatic dissemination in order of frequency are the lung, breast, prostate and kidney. We report a case of an unusual cervical intradural extramedullary metastasis of clear-cell kidney carcinoma associated with a cervical spinal cord hemangioblastoma in a 45-year-old patient with Von Hippel-Lindau disease who had developed retinal hemangioblastomas 20 years earlier. A review of the relevant literature is proposed.
Collapse
|
192
|
Gonzalez J, Rojas I, Ortega J, Pomares H, Fernandez J, Diaz A. Multiobjective evolutionary optimization of the size, shape, and position parameters of radial basis function networks for function approximation. ACTA ACUST UNITED AC 2003; 14:1478-95. [DOI: 10.1109/tnn.2003.820657] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
193
|
Khoo IC, Diaz A. Nonlinear dynamics in laser polarization conversion by stimulated scattering in nematic liquid crystal films. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2003; 68:042701. [PMID: 14682985 DOI: 10.1103/physreve.68.042701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2003] [Indexed: 05/24/2023]
Abstract
We present a study of the nonlinear dynamics of a coherent polarization conversion process in nematic liquid crystal films. This effect is mediated by two-beam coupling between the incident polarized laser and its orthogonally polarized (lower-frequency) noise component scattered by the director axis fluctuations. A complete model for the director dynamics derived from the basic equations is presented. The existence of complex, time-, and intensity-dependent dynamics of the director motion such as oscillations and various bifurcations including period doubling is revealed.
Collapse
|
194
|
Candel González FJ, Alramadan M, Matesanz M, Diaz A, González-Romo F, Candel I, Calle A, Picazo JJ. Infections in diabetic foot ulcers. Eur J Intern Med 2003; 14:341-343. [PMID: 13678763 DOI: 10.1016/s0953-6205(03)00107-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Foot ulcers and infections are common in diabetic patients. A 30-month-long descriptive study was conducted in our hospital in which we analyzed microbiological isolates of all patients admitted with diabetic foot infections. The predominant flora identified were Staphylococcus aureus and coagulase-negative Staphylococcus, followed by Enterococcus spp., Streptococcus spp., and enterobacteriaceaes. In 27 positive cultures (42%) polymicrobial flora were found. There were only 5% anaerobic bacteria. There appears to be a relationship between the sample collection system and microbiological isolates.
Collapse
|
195
|
Dowsland K, Diaz A. Heuristic design and fundamentals of the Simulated Annealing. INTELIGENCIA ARTIFICIAL 2003. [DOI: 10.4114/ia.v7i19.718] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
196
|
Diaz A, Fouilloux C, Ortiz S. Open trial study of a combined antidepressant (amitryptiline, perphenazine, diazepam) versus fluoxetine or imipramine in ambulatory depressed patients. PROCEEDINGS OF THE WESTERN PHARMACOLOGY SOCIETY 2003; 45:154-5. [PMID: 12434564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
|
197
|
Petrovic M, Barceló D, Diaz A, Ventura F. Low nanogram per liter determination of halogenated nonylphenols, nonylphenol carboxylates, and their non-halogenated precursors in water and sludge by liquid chromatography electrospray tandem mass spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2003; 14:516-527. [PMID: 12745221 DOI: 10.1016/s1044-0305(03)00139-9] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A new LC-MS-MS method for quantitative analysis of nonylphenol (NP), nonylphenol carboxylates (NPECs), and their halogenated derivatives: brominated and chlorinated nonylphenols (BrNP, ClNP), brominated and chlorinated nonylphenol carboxylates (BrNPE(1)C and ClNPE(1)C) and ethoxycarboxylates (BrNPE(2)C and ClNPE(2)C) in water and sludge has been developed. Electrospray negative ionization MS-MS was applied for the identification of above mentioned compounds. Upon collision-induced dissociation, their deprotonated molecules gave different fragments formed by the cleavage of the alkyl moiety and/or (ethoxy)carboxylic moiety. For halogenated compounds a highly diagnostic characteristic pattern of isotopic doublet signals was obtained and fragmentation yielded, in addition to above mentioned ions, [Br](-) and [Cl](-), respectively. Quantitative analysis was done in the multiple reaction monitoring (MRM) mode, using two specific combinations of a precursor-product ion transitions for each compound. Additionally, for halogenated compounds two specific channels for each transition reaction, corresponding to two isotopes, were monitored and the ratio of their abundances used as an identification criterion. The method has been validated in terms of sensitivity, selectivity, accuracy, and precision and was applied to the analysis of water and sludge samples from drinking water treatment plant (DWTP) of Barcelona (Catalonia, NE Spain). Halogenated NP and NPECs were detected in prechlorinated water in concentrations up to 315 ng/L, BrNPE(2)C being the most abundant compound. In the DWTP effluent non-halogenated compounds were detected at trace levels (85, 12 and 10 ng/L for NP, NPE(1)C, and NPE(2)C, respectively), whereas concentration of halogenated derivatives never exceeded 10 ng/L. Nonylphenol, brominated and chlorinated NPs were found in flocculation sludge in concentrations of 150, 105, and 145 microg/kg, respectively. Acidic polar metabolites were found in lower concentrations up to 20 microg/kg.
Collapse
|
198
|
Gumucio DL, Diaz A, Schaner P, Richards N, Babcock C, Schaller M, Cesena T. Fire and ICE: the role of pyrin domain-containing proteins in inflammation and apoptosis. Clin Exp Rheumatol 2002; 20:S45-53. [PMID: 12371636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
The genetic bases for several human autoinflammatory syndromes have recently been identified, and the mutated proteins responsible for these diseases are rapidly being characterized. Here, we examine two of these newly identified proteins, pyrin (also called marenostrin, product of the familial Mediterranean fever locus, MEFV) and cryopyrin (product of the CAIS1 locus, and mutated in familial cold urticaria, Muckle Wells syndrome and chronic infantile neurological cutaneous and articular syndrome). Both pyrin and cryopyrin contain an N-terminal domain that encodes a death domain-related structure, now known as the pyrin domain, or PyD. We trace the molecular interactions mediated by these PyDs, examine the evolution of the family of molecules containing this domain, and discuss the function of PyD-containing proteins and their homologues. Synthesis of the available data indicates that both pyrin and cryopyrin interact via their PyDs with a common adaptor protein, ASC. ASC itself participates in at least three important cellular processes: apoptosis, recruitment and activation of pro-caspase-1 (with associated processing and secretion of IL-1beta), and activation of NF-kappaB (a transcription factor involved in both initiation and resolution of the inflammatory response). Through PyD:PyD interactions, pyrin and cryopyrin, as well as several related, but still uncharacterized PyD containing proteins, appear to modulate the activity of all three of these processes, each of which plays a crucial role in the inflammatory pathways that characterize the innate immune system.
Collapse
|
199
|
Diaz A, Fulcher J. Rearrangement reactions of 9-arylbicyclo[4.2.1]nona-2,4,7-trien-9-yl cations. J Am Chem Soc 2002. [DOI: 10.1021/ja00833a019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
200
|
Rubio M, Garcia Hernandez A, Daudey JP, Cetina R. R, Diaz A. Thermal decarbonylation of some strained ketones. J Org Chem 2002. [DOI: 10.1021/jo01289a029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|