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Alves MA, Lotufo PA, Benseñor I, Marchioni DML. Dietary patterns and adiposity over time - analysis of the ELSA-Brasil. Eur J Nutr 2024:10.1007/s00394-024-03350-w. [PMID: 38366269 DOI: 10.1007/s00394-024-03350-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 01/20/2024] [Indexed: 02/18/2024]
Abstract
PURPOSE Combining different statistical methods to identify dietary patterns (DP) may provide new insights on how diet is associated with adiposity. This study investigated the association of DP derived from three data-driven methods and adiposity indicators over time. METHODS This study used data from the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). DP were identified at baseline applying three statistical methods: Factor Analysis (FA), Treelet Transform (TT), and Reduced Rank Regression (RRR). The association between DP and adiposity indicators (weight, body mass index, waist circumference, body fat percentage and fat mass index) over the period of 8.2 years of follow-up was assessed by linear mixed-models. RESULTS Convenience DP, marked by unhealthy food groups, was associated with higher adiposity over the follow-up period, regardless of the method applied. The DP identified by TT and marked by high consumption of rice and beans was associated with lower adiposity, whereas the similar DP identified by FA, but additionally characterised by consumption of poultry and red meat was associated with higher adiposity. Prudent DP, marked by plant-based food groups and fish, identified by FA was associated with lower adiposity across the median follow-up time. CONCLUSION Applying different methods to identify DP showed that a convenience DP was associated with higher adiposity independent of the method applied. We also identified the nuances within adherence to a Brazilian traditional dietary pattern characterised by the consumption of rice and beans, that only when combined with reduced consumption of animal protein and unhealthy foods was associated with lower adiposity over time.
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Affiliation(s)
- Mariane A Alves
- Department of Nutrition, School of Public Health, University of São Paulo, São Paulo, Brazil
| | - Paulo A Lotufo
- Center for Clinical and Epidemiological Research, University Hospital, University of São Paulo, São Paulo, Brazil
| | - Isabela Benseñor
- Center for Clinical and Epidemiological Research, University Hospital, University of São Paulo, São Paulo, Brazil
| | - Dirce Maria L Marchioni
- Department of Nutrition, School of Public Health, University of São Paulo, São Paulo, Brazil.
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Zografos K, Pimenta F, Alves MA, Oliveira MSN. Microfluidic converging/diverging channels optimised for homogeneous extensional deformation. Biomicrofluidics 2016; 10:043508. [PMID: 27478523 PMCID: PMC4947041 DOI: 10.1063/1.4954814] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 06/13/2016] [Indexed: 05/26/2023]
Abstract
In this work, we optimise microfluidic converging/diverging geometries in order to produce constant strain-rates along the centreline of the flow, for performing studies under homogeneous extension. The design is examined for both two-dimensional and three-dimensional flows where the effects of aspect ratio and dimensionless contraction length are investigated. Initially, pressure driven flows of Newtonian fluids under creeping flow conditions are considered, which is a reasonable approximation in microfluidics, and the limits of the applicability of the design in terms of Reynolds numbers are investigated. The optimised geometry is then used for studying the flow of viscoelastic fluids and the practical limitations in terms of Weissenberg number are reported. Furthermore, the optimisation strategy is also applied for electro-osmotic driven flows, where the development of a plug-like velocity profile allows for a wider region of homogeneous extensional deformation in the flow field.
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Affiliation(s)
- K Zografos
- James Weir Fluids Laboratory, Department of Mechanical and Aerospace Engineering, University of Strathclyde , Glasgow G1 1XJ, United Kingdom
| | - F Pimenta
- Centro de Estudos de Fenómenos de Transporte, Departamento de Engenharia Química, Faculdade de Engenharia da Universidade do Porto , 4200-465 Porto, Portugal
| | - M A Alves
- Centro de Estudos de Fenómenos de Transporte, Departamento de Engenharia Química, Faculdade de Engenharia da Universidade do Porto , 4200-465 Porto, Portugal
| | - M S N Oliveira
- James Weir Fluids Laboratory, Department of Mechanical and Aerospace Engineering, University of Strathclyde , Glasgow G1 1XJ, United Kingdom
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Abstract
We present an experimental investigation of viscoelastic fluid flow in a cross-slot microgeometry under low Reynolds number flow conditions. By using several viscoelastic fluids, we investigate the effects of the microchannel bounding walls and the polymer solution concentration on the flow patterns. We demonstrate that for concentrated polymer solutions, the flow undergoes a bifurcation above a critical Weissenberg number (Wi) at which the flow becomes asymmetric but remains steady. The appearance of this elastic instability depends on the channel aspect ratio, defined as the ratio between the depth and the width of the channels. At high aspect ratios, when bounding wall effects are reduced, two types of elastic instabilities were observed, one in which the flow becomes asymmetric and steady, followed by a second instability at higher Wi, in which the flow becomes time-dependent. When the aspect ratio decreases, the bounding walls have a stabilizing effect, preventing the occurrence of steady asymmetric flow and postponing the transition to unsteady flow to higher Wi. For less concentrated solutions, the first elastic instability to steady asymmetric flow is absent and only the time-dependent flow instability is observed.
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Affiliation(s)
- P C Sousa
- Departamento de Engenharia Química, CEFT, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
| | - F T Pinho
- CEFT, Departamento de Engenharia Mecânica, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - M S N Oliveira
- James Weir Fluids Laboratory, Department of Mechanical and Aerospace Engineering, University of Strathclyde, Glasgow, G1 1XJ, UK
| | - M A Alves
- Departamento de Engenharia Química, CEFT, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
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Haward SJ, Jaishankar A, Oliveira MSN, Alves MA, McKinley GH. Extensional flow of hyaluronic acid solutions in an optimized microfluidic cross-slot device. Biomicrofluidics 2013; 7:044108. [PMID: 24738010 PMCID: PMC3970904 DOI: 10.1063/1.4816708] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Accepted: 07/09/2013] [Indexed: 05/15/2023]
Abstract
We utilize a recently developed microfluidic device, the Optimized Shape Cross-slot Extensional Rheometer (OSCER), to study the elongational flow behavior and rheological properties of hyaluronic acid (HA) solutions representative of the synovial fluid (SF) found in the knee joint. The OSCER geometry is a stagnation point device that imposes a planar extensional flow with a homogenous extension rate over a significant length of the inlet and outlet channel axes. Due to the compressive nature of the flow generated along the inlet channels, and the planar elongational flow along the outlet channels, the flow field in the OSCER device can also be considered as representative of the flow field that arises between compressing articular cartilage layers of the knee joints during running or jumping movements. Full-field birefringence microscopy measurements demonstrate a high degree of localized macromolecular orientation along streamlines passing close to the stagnation point of the OSCER device, while micro-particle image velocimetry is used to quantify the flow kinematics. The stress-optical rule is used to assess the local extensional viscosity in the elongating fluid elements as a function of the measured deformation rate. The large limiting values of the dimensionless Trouton ratio, Tr ∼ O(50), demonstrate that these fluids are highly extensional-thickening, providing a clear mechanism for the load-dampening properties of SF. The results also indicate the potential for utilizing the OSCER in screening of physiological SF samples, which will lead to improved understanding of, and therapies for, disease progression in arthritis sufferers.
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Affiliation(s)
- S J Haward
- Faculdade de Engenharia da Universidade do Porto, Centro de Estudos de Fenómenos de Transporte, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - A Jaishankar
- Hatsopoulos Microfluids Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - M S N Oliveira
- Department of Mechanical & Aerospace Engineering, University of Strathclyde, Glasgow G1 1XJ, United Kingdom
| | - M A Alves
- Faculdade de Engenharia da Universidade do Porto, Centro de Estudos de Fenómenos de Transporte, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - G H McKinley
- Hatsopoulos Microfluids Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Ejlebjerg Jensen K, Szabo P, Okkels F, Alves MA. Experimental characterisation of a novel viscoelastic rectifier design. Biomicrofluidics 2012; 6:44112. [PMID: 24324532 PMCID: PMC3555510 DOI: 10.1063/1.4769781] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Accepted: 11/19/2012] [Indexed: 05/16/2023]
Abstract
A planar microfluidic system with contractions and obstacles is characterized in terms of anisotropic flow resistance due to viscoelastic effects. The working mechanism is illustrated using streak photography, while the diodicity performance is quantified by pressure drop measurements. The point of maximum performance is found to occur at relatively low elasticity levels, with diodicity around 3.5. Based on a previously published numerical work [Ejlebjerg et al., Appl. Phys. Lett. 100, 234102 (2012)], 2D simulations of the FENE-CR differential constitutive model are also presented, but limited reproducibility and uncertainties of the experimental data prevent a direct comparison at low elasticity, where the flow is essentially two-dimensional.
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Affiliation(s)
- Kristian Ejlebjerg Jensen
- Department of Micro- and Nanotechnology, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
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6
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Sousa PC, Pinho FT, Oliveira MSN, Alves MA. Extensional flow of blood analog solutions in microfluidic devices. Biomicrofluidics 2011; 5:14108. [PMID: 21483662 PMCID: PMC3073011 DOI: 10.1063/1.3567888] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Accepted: 01/26/2011] [Indexed: 05/13/2023]
Abstract
In this study, we show the importance of extensional rheology, in addition to the shear rheology, in the choice of blood analog solutions intended to be used in vitro for mimicking the microcirculatory system. For this purpose, we compare the flow of a Newtonian fluid and two well-established viscoelastic blood analog polymer solutions through microfluidic channels containing both hyperbolic and abrupt contractions∕expansions. The hyperbolic shape was selected in order to impose a nearly constant strain rate at the centerline of the microchannels and achieve a quasihomogeneous and strong extensional flow often found in features of the human microcirculatory system such as stenoses. The two blood analog fluids used are aqueous solutions of a polyacrylamide (125 ppm w∕w) and of a xanthan gum (500 ppm w∕w), which were characterized rheologically in steady-shear flow using a rotational rheometer and in extension using a capillary breakup extensional rheometer (CaBER). Both blood analogs exhibit a shear-thinning behavior similar to that of whole human blood, but their relaxation times, obtained from CaBER experiments, are substantially different (by one order of magnitude). Visualizations of the flow patterns using streak photography, measurements of the velocity field using microparticle image velocimetry, and pressure-drop measurements were carried out experimentally for a wide range of flow rates. The experimental results were also compared with the numerical simulations of the flow of a Newtonian fluid and a generalized Newtonian fluid with shear-thinning behavior. Our results show that the flow patterns of the two blood analog solutions are considerably different, despite their similar shear rheology. Furthermore, we demonstrate that the elastic properties of the fluid have a major impact on the flow characteristics, with the polyacrylamide solution exhibiting a much stronger elastic character. As such, these properties must be taken into account in the choice or development of analog fluids that are adequate to replicate blood behavior at the microscale.
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Abstract
Using a numerical technique we demonstrate that the flow of the simplest differential viscoelastic fluid model (i.e., the upper-convected Maxwell model) goes through a bifurcation to a steady asymmetric state when flowing in a perfectly symmetric "cross-slot" geometry. We show that this asymmetry is purely elastic in nature and that the effect of inertia is a stabilizing one. Our results are in qualitative agreement with very recent experimental visualizations of a similar flow in the microfluidic apparatus of Arratia et al.
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Affiliation(s)
- R J Poole
- Department of Engineering, University of Liverpool, Brownlow Street, Liverpool, L69 3GH United Kingdom
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Keitel E, Santos AF, Alves MA, Neto JP, Schaefer PG, Bittar AE, Goldani JC, Pozza R, Bruno RM, See D, Garcia CD, Garcia VD. Immunosuppression protocols for HLA identical renal transplant recipients. Transplant Proc 2003; 35:1074-5. [PMID: 12947863 DOI: 10.1016/s0041-1345(03)00313-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- E Keitel
- Renal Transplant Unit, Santa Casa Hospital, Porto Alegre, RS, Brazil.
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Abstract
The D. serido superspecies is a complex mosaic of populations distributed over a vast part of South America and showing various degrees of genetical divergence. We have analyzed its chromosomal constitution in 16 new localities of southeastern and southern Brazil. Both the metaphase and salivary gland chromosomes show a sharp split of these populations in two groups. Four populations, fixed for inversion 2e8 and showing the type I karyotype, represent the southwestern limit of D. serido type B, which inhabits the Cerrado in central-western Brazil. The remaining populations are homozygous for 2x7, an inversion also fixed in the Caatinga populations of northeastern Brazil. However, their karyotype, in those populations analyzed, belong to a different type (V) from that of the Caatinga populations. Populations in this second group are polymorphic for five inversions on chromosome 2 plus another on chromosome 5 and show considerable interpopulation differentiation. The breakpoints of chromosome 2 inversions are described and the inversion loops of several heterokaryotypes are presented. Biogeographical information suggests that there are clear ecological differences between the two groups of populations as well as among the populations within the second group. Thepossible role of host plants in promoting the genetic divergence among the D. serido populations is discussed.
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Affiliation(s)
- A Ruiz
- Departament de Genètica i de Microbiologia, Facultat de Cièncias, Universitat Autònoma de Barcelona, Bellaterra, Spain.
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10
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Lima CR, Soares LL, Cescato L, Alves MA, Braga ES. Diffractive structures holographically recorded in amorphous hydrogenated carbon (a-C:H) films. Opt Lett 1997; 22:1805-1807. [PMID: 18188372 DOI: 10.1364/ol.22.001805] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We propose and demonstrate the direct recording of submicrometer relief gratings in amorphous hydrogenated carbon (a -C:H) films by reactive ion etching (RIE) for use as diffractive optical components. The high refractive index of this film and its transparency in the IR make such structures promising candidates for IR-transmission diffractive optical components. The structures are holographically recorded in photoresist and then transferred to a thin aluminum layer that is used as a mask for RIE of the a -C:H films. The diffraction measurements of the structures recorded in these films demonstrated the feasibility of using the materials as diffractive optical components.
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11
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Ferreira RA, Alves MA. [Primary non-hodgkin lymphoma of the testicle]. Actas Urol Esp 1997; 21:777-80. [PMID: 9412229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- R A Ferreira
- Servicio de Urología, Hospital Senhora da Oliveira, Guimaraes, Portugal
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de Souza Pinto E, Erazo PJ, Muniz AC, Prado Filho FS, Alves MA, Salazar GH. Breast reduction: shortening scars with liposuction. Aesthetic Plast Surg 1996; 20:481-8. [PMID: 8929324 DOI: 10.1007/s002669900066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The authors describe a mammaplasty reduction technique they believe is safe due to modern cutaneous resection and adequate areolar nourishment. It is made possible by maintaining a large pedicule which is also versatile since it can be used on all kinds of breasts. Good results can be reproduced by other surgeons.
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Affiliation(s)
- E de Souza Pinto
- Centro Científico Brasileiro de Cirurgia Plástica, São Paulo, Brazil
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Pinto AC, Evangelista T, Carvalho M, Alves MA, Sales Luís ML. Respiratory assistance with a non-invasive ventilator (Bipap) in MND/ALS patients: survival rates in a controlled trial. J Neurol Sci 1995; 129 Suppl:19-26. [PMID: 7595610 DOI: 10.1016/0022-510x(95)00052-4] [Citation(s) in RCA: 191] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Noninvasive ventilatory assistance, in ALS patients, with the bilevel intermittent positive air pressure (Bipap) was studied, in a prospective and controlled trial, by the authors. Twenty ALS bulbar patients, fulfilling El Escorial criteria for probable or definite disease, were selected. For the follow-up all patients were submitted to evaluation with the Norris scale, modified Barthel score and an analog scale of life satisfaction, every 3 months. All patients were also submitted to respiratory functional testing (RFT). Ten of these patients were treated with palliative management (group I), the remaining ten patients received Bipap support (group II). Clinical evolution curves and clinical parameters were not statistically different in both groups, except for the percentage of actual predicted value of vital capacity (p < 0.03), showing a more advanced disease in group II patients. Analog scale of life satisfaction showed improvement in the group II, even after the beginning of respiratory insufficiency, though without significance probably due to the small sample size (p < 0.1). Since 6 patients in group II are still alive survival rates were compared with log rank test considering cumulative survivals with Kaplan-Meier estimates. Total survival and survival from diurnal abnormalities in gas exchange (survival 1) were significantly longer for group II (p < 0.006 and p < 0.0004, respectively). In spite of the small number of patients, preliminary results strongly support the importance of BIPAP in ALS patients, though further studies must go on in order to optimize the best time for introducing Bipap.
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Affiliation(s)
- A C Pinto
- Department of Medical Rehabilitation, Hospital de Santa Maria, Lisbon, Portugal
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14
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Mazzali M, Alves Filho G, Alves MA, de Faria JB. Comparative study of two protocols for living-related renal transplantation: donor-specific transfusion versus cyclosporine. Transplant Proc 1995; 27:1832-3. [PMID: 7725525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- M Mazzali
- Nephrology Unit, Universidade Estadual de Campinas, Sao Paulo, Brazil
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Johansen PB, Nässberger L, Alves MA, Nived O, Sturfelt G. Soluble interleukin-2 receptor in systemic lupus erythematosus--relationship to disease activity and kidney function. Clin Exp Rheumatol 1992; 10:199-200. [PMID: 1505116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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de Faria JB, Alves MA, Pedrini H, Alves Filho G. [Nephrotic syndrome caused by membranous glomerulonephritis associated with chronic myeloid leukemia]. AMB Rev Assoc Med Bras 1991; 37:47-9. [PMID: 1658867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A patient developed nephrotic syndrome four years after diagnosed chronic myelogenous leukemia. Renal histology showed characteristic changes of membranous glomerulopathy. To our knowledge, this is the first reported case of membranous glomerulopathy associated with chronic myelogenous leukemia.
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Nishida SK, Alves MA, Ramos OL, Pereira AB. Characterization of circulating immune complexes detected by monoclonal rheumatoid factor and conglutinin radioimmunoassays in SLE nephritis. J Clin Lab Immunol 1988; 27:163-9. [PMID: 3251047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
By utilizing a monoclonal rheumatoid factor (mRF) and bovine conglutinin (K) in radioimmunoassays, ICs detected in sera of patients with lupus nephritis were partially characterized. The mRF-RIA detected high levels of ICs in 86.9% of patients with active SLE and in only 22.7% of patients with inactive disease. Positive association was observed with clinical scores and significant negative correlation was found with serum levels of C1q, C3 and C4. The mRF-reactive ICs were shown to be cryoprecipitable and analysis by gel filtration through Sephacryl S-300 disclosed a material eluting between IgM and IgG, being dissociated in acidic pH. On the other hand, no association could be demonstrated between levels of ICs detected by K-RIA and clinical activity. Positivity in this assay was only 8.7% and 31.8% for active and inactive groups. Differently from the ICs detected by mRF-RIA, the K-reactive material was not precipitated by 3.5% PEG, nor by centrifugation in the cold, and EDTA did not reduce the binding of IgG to K in positive sera. The reactive IgG in Sephacryl S-300 chromatography eluted in the same position as monomeric IgG both in neutral and dissociating conditions. No C3 could be detected in ICs reactive in both assays.
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Affiliation(s)
- S K Nishida
- Disciplina de Nefrologia--Escola Paulista de Medicina, São Paulo, Brasil
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Sesso RDC, Alves MA, Nishida SK, Ramos OL, Pereira AB. [Value of the detection of circulating immune complexes in acute diffuse poststreptococcal glomerulonephritis]. AMB Rev Assoc Med Bras 1987; 33:43-5. [PMID: 3501138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Uflacker R, Alves MA, Diehl JC. Gastrointestinal involvement in neurofibromatosis: angiographic presentation. Gastrointest Radiol 1985; 10:163-5. [PMID: 3922843 DOI: 10.1007/bf01893093] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A large neurofibroma associated with gastrointestinal hemorrhage was demonstrated by visceral arteriography. The findings are correlated with those of resected pathologic specimen.
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Abstract
A case of extrahepatic portal hypertension and gastric variceal bleeding due to portal vein occlusion, most probably secondary to chronic pancreatitis, was treated by percutaneous transhepatic angioplasty. After the portal angioplasty there was marked clinical improvement, with control of the variceal bleeding and significant reduction of the pressure gradient within the portal system.
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Laicine EM, Alves MA, de Almeida JC, Rizzo E, Albernaz WC, Sauaia H. Development of DNA puffs and patterns of polypeptide synthesis in the salivary glands of Bradysia hygida. Chromosoma 1984; 89:280-4. [PMID: 6745005 DOI: 10.1007/bf00292475] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In the three salivary gland regions of Bradysia hygida (Diptera, Sciaridae) the patterns of polypeptide synthesis, as revealed by electrophoresis and fluorography, are very stable during the fourth larval instar until about 30 h before the pupal molt. At this age the patterns of polypeptide synthesis start to undergo marked changes. The striking correlations between these changes and the development of two distinct groups of DNA puffs support the proposal that DNA puffs are causally related to the synthesis of specific proteins in the salivary glands.
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