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Lamy E, Neves S, Ferreira J, Rodrigues L, da Costa G, Cordeiro C, Fialho L, Lima M, Costa AR, Antunes CM, Lopes O, Amado F, Capela E Silva F. Effects of hyperleptinemia in rat saliva composition, histology and ultrastructure of the major salivary glands. Arch Oral Biol 2018; 96:1-12. [PMID: 30153534 DOI: 10.1016/j.archoralbio.2018.08.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Revised: 07/12/2018] [Accepted: 08/15/2018] [Indexed: 01/30/2023]
Abstract
OBJECTIVE To study the effect of the satiety hormone, leptin, in saliva proteome and salivary gland histology and ultrastructure. DESIGN Increases in blood leptin levels were induced through mini-pump infusion in male Wistar rats, during a period of 7 days. Saliva was collected before and at the end of the experimental period, for proteomic analysis, and major salivary glands were collected, at the end, for biochemical, histological and ultrastructural analysis. RESULTS Immunohistochemistry revealed the presence of leptin receptors in major salivary glands. Salivary amylase levels and enzymatic activity were decreased in saliva, whereas the enzymatic activity of this protein was increased in the cytosol of parotid gland cells. Transmission electron microscopy allowed the observation of high number of electron-dense granules in cytosol of parotid acinar cells, from leptin treated animals. CONCLUSIONS Increased levels of plasmatic leptin result in changes in saliva composition and salivary glands function. To our knowledge, this is the first study providing evidences for a potential role of leptin in salivary gland secretion and saliva composition. An understanding of how appetite/satiety factors influence saliva composition and how this composition influences food processing in mouth may be relevant in understanding ingestivebehaviour.
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Affiliation(s)
- Elsa Lamy
- Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora, 7002-554 Évora, Portugal.
| | - Sandra Neves
- Departamento de Química, Escola de Ciências e Tecnologia, Universidade de Évora, 7002-554 Évora, Portugal
| | - Joana Ferreira
- Departamento de Química, Escola de Ciências e Tecnologia, Universidade de Évora, 7002-554 Évora, Portugal
| | - Lénia Rodrigues
- Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora, 7002-554 Évora, Portugal
| | - Gonçalo da Costa
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal
| | - Carlos Cordeiro
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal
| | - Luísa Fialho
- Departamento de Medicina Veterinária, Escola de Ciências e Tecnologia, Universidade de Évora, 7002-554 Évora, Portugal
| | - Mónica Lima
- Departamento de Biologia, Escola de Ciências e Tecnologia, Universidade de Évora, 7002-554 Évora, Portugal
| | - Ana Rodrigues Costa
- Departamento de Química, Escola de Ciências e Tecnologia, Universidade de Évora, 7002-554 Évora, Portugal; Instituto de Ciências da Terra (ICT), Universidade de Évora, 7002-554 Évora, Portugal
| | - Célia Miguel Antunes
- Departamento de Química, Escola de Ciências e Tecnologia, Universidade de Évora, 7002-554 Évora, Portugal; Instituto de Ciências da Terra (ICT), Universidade de Évora, 7002-554 Évora, Portugal
| | - Orlando Lopes
- Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora, 7002-554 Évora, Portugal; Departamento de Biologia, Escola de Ciências e Tecnologia, Universidade de Évora, 7002-554 Évora, Portugal
| | - Francisco Amado
- Departamento de Química, Universidade de Aveiro, 3810 Aveiro, Portugal; Química Orgânica, Produtos Naturais e Agroalimentares (QOPNA), Universidade de Aveiro, 3810 Aveiro, Portugal
| | - Fernando Capela E Silva
- Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora, 7002-554 Évora, Portugal; Departamento de Biologia, Escola de Ciências e Tecnologia, Universidade de Évora, 7002-554 Évora, Portugal
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Toubarro D, Gouveia A, Ribeiro RM, Simões N, da Costa G, Cordeiro C, Santos R. Cloning, Characterization, and Expression Levels of the Nectin Gene from the Tube Feet of the Sea Urchin Paracentrotus Lividus. Mar Biotechnol (NY) 2016; 18:372-383. [PMID: 27194026 DOI: 10.1007/s10126-016-9698-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 02/10/2016] [Indexed: 06/05/2023]
Abstract
Marine bioadhesives perform in ways that manmade products simply cannot match, especially in wet environments. Despite their technological potential, bioadhesive molecular mechanisms are still largely understudied, and sea urchin adhesion is no exception. These animals inhabit wave-swept shores, relying on specialized adhesive organs, tube feet, composed by an adhesive disc and a motile stem. The disc encloses a duo-gland adhesive system, producing adhesive and deadhesive secretions for strong reversible substratum attachment. The disclosure of sea urchin Paracentrotus lividus tube foot disc proteome led to the identification of a secreted adhesion protein, Nectin, never before reported in adult adhesive organs but, that given its adhesive function in eggs/embryos, was pointed out as a putative substratum adhesive protein in adults. To further understand Nectin involvement in sea urchin adhesion, Nectin cDNA was amplified for the first time from P. lividus adhesive organs, showing that not only the known Nectin mRNA, called Nectin-1 (GenBank AJ578435), is expressed in the adults tube feet but also a new mRNA sequence, called Nectin-2 (GenBank KT351732), differing in 15 missense nucleotide substitutions. Nectin genomic DNA was also obtained for the first time, indicating that both Nectin-1 and Nectin-2 derive from a single gene. In addition, expression analysis showed that both Nectins are overexpressed in tube feet discs, its expression being significantly higher in tube feet discs from sea urchins just after collection from the field relative to sea urchin from aquarium. These data further advocate for Nectin involvement in sea urchin reversible adhesion, suggesting that its expression might be regulated according to the hydrodynamic conditions.
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Affiliation(s)
- Duarte Toubarro
- Centro de Biotecnologia dos Açores, Departamento de Biologia, Universidade dos Açores, 9501-801, Ponta Delgada, Açores, Portugal
- Structural and Cellular Microbiology Unit, Instituto de Tecnologia Química e Biológica, 2780-157, Oeiras, Portugal
| | - Analuce Gouveia
- Centro de Biotecnologia dos Açores, Departamento de Biologia, Universidade dos Açores, 9501-801, Ponta Delgada, Açores, Portugal
| | - Raquel Mesquita Ribeiro
- Centro de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 1749-016, Lisboa, Portugal
- Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Lisboa, Portugal
| | - Nélson Simões
- Centro de Biotecnologia dos Açores, Departamento de Biologia, Universidade dos Açores, 9501-801, Ponta Delgada, Açores, Portugal
| | - Gonçalo da Costa
- Centro de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 1749-016, Lisboa, Portugal
- Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Lisboa, Portugal
- Laboratório de FTICR e Espectrometria de Massa Estrutural, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Lisboa, Portugal
| | - Carlos Cordeiro
- Centro de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 1749-016, Lisboa, Portugal
- Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Lisboa, Portugal
- Laboratório de FTICR e Espectrometria de Massa Estrutural, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Lisboa, Portugal
| | - Romana Santos
- Centro de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 1749-016, Lisboa, Portugal.
- MARE-Centro de Ciências do Mar e do Ambiente, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 1749-016, Lisboa, Portugal.
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Lebesgue N, da Costa G, Ribeiro RM, Ribeiro-Silva C, Martins GG, Matranga V, Scholten A, Cordeiro C, Heck AJR, Santos R. Deciphering the molecular mechanisms underlying sea urchin reversible adhesion: A quantitative proteomics approach. J Proteomics 2016; 138:61-71. [PMID: 26926440 DOI: 10.1016/j.jprot.2016.02.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 02/22/2016] [Accepted: 02/23/2016] [Indexed: 01/24/2023]
Abstract
UNLABELLED Marine bioadhesives have unmatched performances in wet environments, being an inspiration for biomedical applications. In sea urchins specialized adhesive organs, tube feet, mediate reversible adhesion, being composed by a disc, producing adhesive and de-adhesive secretions, and a motile stem. After tube foot detachment, the secreted adhesive remains bound to the substratum as a footprint. Sea urchin adhesive is composed by proteins and sugars, but so far only one protein, Nectin, was shown to be over-expressed as a transcript in tube feet discs, suggesting its involvement in sea urchin adhesion. Here we use high-resolution quantitative mass-spectrometry to perform the first study combining the analysis of the differential proteome of an adhesive organ, with the proteome of its secreted adhesive. This strategy allowed us to identify 163 highly over-expressed disc proteins, specifically involved in sea urchin reversible adhesion; to find that 70% of the secreted adhesive components fall within five protein groups, involved in exocytosis and microbial protection; and to provide evidences that Nectin is not only highly expressed in tube feet discs but is an actual component of the adhesive. These results give an unprecedented insight into the molecular mechanisms underlying sea urchin adhesion, and opening new doors to develop wet-reliable, reversible, and ecological biomimetic adhesives. SIGNIFICANCE Sea urchins attach strongly but in a reversible manner to substratum, being a valuable source of inspiration for industrial and biomedical applications. Yet, the molecular mechanisms governing reversible adhesion are still poorly studied delaying the engineering of biomimetic adhesives. We used the latest mass spectrometry techniques to analyze the differential proteome of an adhesive organ and the proteome of its secreted adhesive, allowing us to uncover the key players in sea urchin reversible adhesion. We demonstrate, that Nectin, a protein previously pointed out as potentially involved in sea urchin adhesion, is not only highly expressed in tube feet discs, but is a genuine component of the secreted adhesive.
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Affiliation(s)
- Nicolas Lebesgue
- Netherlands Proteomics Center, Padualaan 8, 3584, CH, Utrecht, Netherlands; Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584, CH, Utrecht, Netherlands
| | - Gonçalo da Costa
- Centro de Química e Bioquímica, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, Campo Grande, 1749-016, Lisboa, Portugal; Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Lisboa, Portugal; Laboratório de FTICR e espectrometria de massa estrutural, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Lisboa, Portugal
| | - Raquel Mesquita Ribeiro
- Centro de Química e Bioquímica, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, Campo Grande, 1749-016, Lisboa, Portugal; Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Lisboa, Portugal
| | - Cristina Ribeiro-Silva
- Centro de Química e Bioquímica, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, Campo Grande, 1749-016, Lisboa, Portugal; Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Lisboa, Portugal
| | - Gabriel G Martins
- Instituto Gulbenkian de Ciência, R. da Quinta Grande 6, 2780-156 Oeiras, Portugal; Centro de Ecologia, Evolução e Alterações Ambientais, Faculdade de Ciências da Universidade de Lisboa, Campo Grande 1749-016, Lisboa, Portugal
| | - Valeria Matranga
- Consiglio Nazionale delle Ricerche, Istituto di Biomedicina e Immunologia Molecolare, 'Alberto Monroy', Via Ugo La Malfa 153, 90146 Palermo, Italy
| | - Arjen Scholten
- Netherlands Proteomics Center, Padualaan 8, 3584, CH, Utrecht, Netherlands; Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584, CH, Utrecht, Netherlands
| | - Carlos Cordeiro
- Centro de Química e Bioquímica, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, Campo Grande, 1749-016, Lisboa, Portugal; Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Lisboa, Portugal; Laboratório de FTICR e espectrometria de massa estrutural, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Lisboa, Portugal
| | - Albert J R Heck
- Netherlands Proteomics Center, Padualaan 8, 3584, CH, Utrecht, Netherlands; Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584, CH, Utrecht, Netherlands
| | - Romana Santos
- Centro de Química e Bioquímica, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, Campo Grande, 1749-016, Lisboa, Portugal; MARE - Centro de Ciências do Mar e do Ambiente, Faculdade de Ciências da Universidade de Lisboa, Campo Grande 1749-016, Lisboa, Portugal.
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Vilas-Boas F, Bagulho A, Tenente R, Teixeira VH, Martins G, da Costa G, Jerónimo A, Cordeiro C, Machuqueiro M, Real C. Hydrogen peroxide regulates cell adhesion through the redox sensor RPSA. Free Radic Biol Med 2016; 90:145-57. [PMID: 26603095 DOI: 10.1016/j.freeradbiomed.2015.11.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 10/28/2015] [Accepted: 11/12/2015] [Indexed: 02/06/2023]
Abstract
To become metastatic, a tumor cell must acquire new adhesion properties that allow migration into the surrounding connective tissue, transmigration across endothelial cells to reach the blood stream and, at the site of metastasis, adhesion to endothelial cells and transmigration to colonize a new tissue. Hydrogen peroxide (H2O2) is a redox signaling molecule produced in tumor cell microenvironment with high relevance for tumor development. However, the molecular mechanisms regulated by H2O2 in tumor cells are still poorly known. The identification of H2O2-target proteins in tumor cells and the understanding of their role in tumor cell adhesion are essential for the development of novel redox-based therapies for cancer. In this paper, we identified Ribosomal Protein SA (RPSA) as a target of H2O2 and showed that RPSA in the oxidized state accumulates in clusters that contain specific adhesion molecules. Furthermore, we showed that RPSA oxidation improves cell adhesion efficiency to laminin in vitro and promotes cell extravasation in vivo. Our results unravel a new mechanism for H2O2-dependent modulation of cell adhesion properties and identify RPSA as the H2O2 sensor in this process. This work indicates that high levels of RPSA expression might confer a selective advantage to tumor cells in an oxidative environment.
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Affiliation(s)
- Filipe Vilas-Boas
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal.
| | - Ana Bagulho
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal.
| | - Rita Tenente
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal.
| | - Vitor H Teixeira
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal.
| | - Gabriel Martins
- Instituto Gulbenkian de Ciência, R. Quinta Grande 6, 2780-156 Oeiras, Portugal; CE3C - Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal.
| | - Gonçalo da Costa
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal.
| | - Ana Jerónimo
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal.
| | - Carlos Cordeiro
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal.
| | - Miguel Machuqueiro
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal.
| | - Carla Real
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal.
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da Costa G, Ribeiro-Silva C, Ribeiro R, Gilberto S, Gomes RA, Ferreira A, Mateus É, Barroso E, Coelho AV, Freire AP, Cordeiro C. Transthyretin Amyloidosis: Chaperone Concentration Changes and Increased Proteolysis in the Pathway to Disease. PLoS One 2015; 10:e0125392. [PMID: 26147092 PMCID: PMC4492746 DOI: 10.1371/journal.pone.0125392] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 03/24/2015] [Indexed: 11/18/2022] Open
Abstract
Transthyretin amyloidosis is a conformational pathology characterized by the extracellular formation of amyloid deposits and the progressive impairment of the peripheral nervous system. Point mutations in this tetrameric plasma protein decrease its stability and are linked to disease onset and progression. Since non-mutated transthyretin also forms amyloid in systemic senile amyloidosis and some mutation bearers are asymptomatic throughout their lives, non-genetic factors must also be involved in transthyretin amyloidosis. We discovered, using a differential proteomics approach, that extracellular chaperones such as fibrinogen, clusterin, haptoglobin, alpha-1-anti-trypsin and 2-macroglobulin are overrepresented in transthyretin amyloidosis. Our data shows that a complex network of extracellular chaperones are over represented in human plasma and we speculate that they act synergistically to cope with amyloid prone proteins. Proteostasis may thus be as important as point mutations in transthyretin amyloidosis.
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Affiliation(s)
- Gonçalo da Costa
- Centro de Química e Bioquímica, FCUL, Campo Grande, Lisboa, Portugal
| | | | - Raquel Ribeiro
- Centro de Química e Bioquímica, FCUL, Campo Grande, Lisboa, Portugal
| | - Samuel Gilberto
- Centro de Química e Bioquímica, FCUL, Campo Grande, Lisboa, Portugal
| | - Ricardo A Gomes
- Instituto de Tecnologia Química e Biológica, Av. da República Estação Agronómica Nacional, Oeiras, Portugal
| | - António Ferreira
- Centro de Química e Bioquímica, FCUL, Campo Grande, Lisboa, Portugal
| | - Élia Mateus
- Unidade de Transplantação, Hospital Curry Cabral, Lisboa, Portugal
| | - Eduardo Barroso
- Unidade de Transplantação, Hospital Curry Cabral, Lisboa, Portugal
| | - Ana V Coelho
- Instituto de Tecnologia Química e Biológica, Av. da República Estação Agronómica Nacional, Oeiras, Portugal
| | - Ana Ponces Freire
- Centro de Química e Bioquímica, FCUL, Campo Grande, Lisboa, Portugal
| | - Carlos Cordeiro
- Centro de Química e Bioquímica, FCUL, Campo Grande, Lisboa, Portugal
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Guerreiro A, da Costa G, Gomes RA, Ribeiro-Silva C, Gilberto S, Mateus E, Monteiro E, Barroso E, Coelho AV, Ponces Freire A, Cordeiro C. α-Synuclein aggregation in the saliva of familial transthyretin amyloidosis: a potential biomarker. Amyloid 2012; 19:74-80. [PMID: 22591216 DOI: 10.3109/13506129.2012.668500] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Familial transthyretin amyloidosis (ATTR) is an autosomal dominant disease characterized by the formation of transthyretin (TTR) amyloid deposits. This crippling and fatal disease is associated with point mutations in TTR, a protein mainly produced in the liver. Hence, liver transplantation is the only treatment capable of halting disease progression. Ideally, liver transplantation should be performed as early as possible in the disease course before significant neurologic disability has been incurred. Early detection of disease before serious pathological lesions occur is crucial for the clinical management of patients and for morbidity delay. Unfortunately, the presence of TTR mutations by itself is not a predictor of disease onset or progression. In the present work, we observed an increased oligomerization of α-synuclein in the saliva of ATTR symptomatic individuals comparatively to asymptomatic carriers of the same TTR mutation and healthy control subjects. Based on this observation, we propose monitoring α-synuclein oligomers in saliva as a biomarker of ATTR progression. Since α-synuclein plays a major role in several neurodegenerative disorders, assessing its oligomerization state in this fluid provides a non-invasive approach to survey these pathologies.
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Affiliation(s)
- Ana Guerreiro
- Departamento de Química e Bioquímica, FCUL, Campo Grande, Lisboa, Portugal
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Ribeiro-Silva C, Gilberto S, Gomes RA, Mateus É, Monteiro E, Barroso E, Coelho AV, da Costa G, Freire AP, Cordeiro C. The relative amounts of plasma transthyretin forms in familial transthyretin amyloidosis: a quantitative analysis by Fourier transform ion-cyclotron resonance mass spectrometry. Amyloid 2011; 18:191-9. [PMID: 22080762 DOI: 10.3109/13506129.2011.614295] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Familial transthyretin amyloidosis (ATTR) is a fatal autosomal dominant disease characterized by the formation of amyloid fibers, mainly composed of transthyretin (TTR). Protein aggregation and amyloid fiber formation are considered concentration dependent processes and since most ATTR patients are heterozygous it is crucial to determine the ratio between mutant and non-mutant TTR forms in human plasma. Using a high resolution mass spectrometry based approach we determined the ratio of TTR forms in ATTR patients, V30M mutation carriers, symptomatic and asymptomatic ones, as well as ATTR patients that received a wild type cadaveric liver transplant. Domino transplanted patients that received a liver from an ATTR patient were also investigated. We found that although wild type TTR is diminished in the plasma of non-transplanted ATTR patients comparatively to healthy subjects, the relationship with the V30M variant does not change with illness progression. Those who received a wild type liver showed no mutant protein while domino transplanted patients presented the same relative amount of V30M as found in asymptomatic and symptomatic individuals. The V30M to wild type TTR ratio in plasma is the same for all ATTR patients studied, showing no variation with disease clinical progression. Our results point to the involvement of additional non-genetic factors on the pathogenesis of this disease.
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Affiliation(s)
- Cristina Ribeiro-Silva
- Center of Chemistry and Biochemistry, Department of Chemistry and Biochemistry, Faculty of Sciences University of Lisbon, Campo Grande, Lisbon, Portugal
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da Costa G, Guerreiro A, Correia CF, Gomes RJ, Freire A, Monteiro E, Barroso E, Coelho AV, Outeiro TF, Freire AP, Cordeiro C. A non-invasive method based on saliva to characterize transthyretin in familial amyloidotic polyneuropathy patients using FT-ICR high-resolution MS. Proteomics Clin Appl 2011; 4:674-8. [PMID: 21179887 DOI: 10.1002/prca.200900118] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To identify, characterize and perform a relative quantification of human transthyretin (TTR) variants in human saliva. EXPERIMENTAL DESIGN Serum and saliva samples were collected from healthy and familial amyloidotic polyneuropathy (FAP) patients, proteins separated by SDS-PAGE, TTR bands excised, in-gel digested and analyzed by MALDI-FTICR. RESULTS We identified and performed a relative quantification of mutated and native TTR forms in human saliva, based on FTICR-MS. The results are quantitatively identical to the ones obtained with human serum. In FAP patients subjected to cadaveric liver transplant, the TTR mutant form is no longer detected in saliva, while in patients receiving a domino liver from a FAP donor the mutant form of TTR becomes detectable in saliva, thus demonstrating the serum origin of TTR in saliva. CONCLUSIONS AND CLINICAL RELEVANCE Saliva TTR originates in serum and the ratio of mutant to native TTR is preserved. The method provides a non-invasive detection of mutated TTR and a relative quantification of TTR forms. Diagnostic and disease prognosis of FAP is crucial at early stages of the disease and after liver transplantation, the only curative therapy. A suitable non-invasive method was developed for monitoring the most important FAP biomarker in human saliva.
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Affiliation(s)
- Gonçalo da Costa
- Departamento de Química e Bioquímica, Centro de Química e Bioquímica, Faculdade de Ciências da Universidadede Lisboa, Edifício C8, Lisboa, Portugal
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Lamy E, Graça G, da Costa G, Franco C, E Silva FC, Baptista ES, Coelho AV. Changes in mouse whole saliva soluble proteome induced by tannin-enriched diet. Proteome Sci 2010; 8:65. [PMID: 21159160 PMCID: PMC3018447 DOI: 10.1186/1477-5956-8-65] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2010] [Accepted: 12/15/2010] [Indexed: 01/02/2023] Open
Abstract
Background Previous studies suggested that dietary tannin ingestion may induce changes in mouse salivary proteins in addition to the primarily studied proline-rich proteins (PRPs). The aim of the present study was to determine the protein expression changes induced by condensed tannin intake on the fraction of mouse whole salivary proteins that are unable to form insoluble tannin-protein complexes. Two-dimensional polyacrylamide gel electrophoresis protein separation was used, followed by protein identification by mass spectrometry. Results Fifty-seven protein spots were excised from control group gels, and 21 different proteins were identified. With tannin consumption, the expression levels of one α-amylase isoform and one unidentified protein increased, whereas acidic mammalian chitinase and Muc10 decreased. Additionally, two basic spots that stained pink with Coomassie Brilliant Blue R-250 were newly observed, suggesting that some induced PRPs may remain uncomplexed or form soluble complexes with tannins. Conclusion This proteomic analysis provides evidence that other salivary proteins, in addition to tannin-precipitating proteins, are affected by tannin ingestion. Changes in the expression levels of the acidic mammalian chitinase precursor and in one of the 14 salivary α-amylase isoforms underscores the need to further investigate their role in tannin ingestion.
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Affiliation(s)
- Elsa Lamy
- ITQB-Instituto de Tecnologia Química e Biológica, Oeiras, Portugal.
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Barata L, Sousa Silva M, Schuldt L, da Costa G, Tomás AM, Ferreira AEN, Weiss MS, Ponces Freire A, Cordeiro C. Cloning, expression, purification, crystallization and preliminary X-ray diffraction analysis of glyoxalase I from Leishmania infantum. Acta Crystallogr Sect F Struct Biol Cryst Commun 2010; 66:571-4. [PMID: 20445262 DOI: 10.1107/s1744309110010754] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2009] [Accepted: 03/22/2010] [Indexed: 05/26/2023]
Abstract
Glyoxalase I (GLO1) is the first of the two glyoxalase-pathway enzymes. It catalyzes the formation of S-D-lactoyltrypanothione from the non-enzymatically formed hemithioacetal of methylglyoxal and reduced trypanothione. In order to understand its substrate binding and catalytic mechanism, GLO1 from Leishmania infantum was cloned, overexpressed in Escherichia coli, purified and crystallized. Two crystal forms were obtained: a cube-shaped form and a rod-shaped form. While the cube-shaped form did not diffract X-rays at all, the rod-shaped form exhibited diffraction to about 2.0 A resolution. The crystals belonged to space group P2(1)2(1)2, with unit-cell parameters a = 130.03, b = 148.51, c = 50.63 A and three dimers of the enzyme per asymmetric unit.
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Affiliation(s)
- Lídia Barata
- Centro de Química e Bioquímica, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Campo Grande, Edificio C8, 1149-016 Lisboa, Portugal
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Lamy E, da Costa G, e Silva FC, Potes J, Coelho AV, Baptista ES. Comparison of Electrophoretic Protein Profiles from Sheep and Goat Parotid Saliva. J Chem Ecol 2008; 34:388-97. [DOI: 10.1007/s10886-008-9442-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2007] [Revised: 01/22/2008] [Accepted: 01/29/2008] [Indexed: 10/22/2022]
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Roxo-Rosa M, da Costa G, Luider TM, Scholte BJ, Coelho AV, Amaral MD, Penque D. Proteomic analysis of nasal cells from cystic fibrosis patients and non-cystic fibrosis control individuals: search for novel biomarkers of cystic fibrosis lung disease. Proteomics 2006; 6:2314-25. [PMID: 16518875 DOI: 10.1002/pmic.200500273] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Potential biological markers for cystic fibrosis (CF) lung disease were identified by comparative proteomics profiling of nasal cells from deletion of phenylalanine residue 508 (F508del)-homozygous CF patients and non-CF controls. From the non-CF 2-DE gels, 65 spots were identified by MS, and a reference 2-DE map was thus established. The majority of those correspond to ubiquitously expressed proteins. Consistent with the epithelial origin of this tissue, some of the identified proteins are epithelial markers (e.g. cytokeratins, palate lung and nasal epithelium clone protein (PLUNC), and squamous cell carcinoma antigen 1). Comparison of this protein profile with the one similarly obtained for CF nasal cells revealed a set of differentially expressed proteins. These included proteins related to chronic inflammation and some others involved in oxidative stress injury. Alterations were also observed in the levels of cytoskeleton proteins, being probably implicated with cytoskeleton organization changes described to occur in CF-airways. Lower levels were found for some mitochondrial proteins suggesting an altered mitochondrial metabolism in CF. Differential expression was also found for two more enzymes that have not been previously associated to CF. Further studies will clarify the involvement of such proteins in CF pathophysiology and whether they are targets for CF therapy.
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Affiliation(s)
- Mónica Roxo-Rosa
- Centre of Human Genetics, National Institute of Health, Lisbon, Portugal.
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Frins E, Failache H, Ferrari J, Costa GD, Lezama A. Optical-fiber diameter determination by scattering at oblique incidence. Appl Opt 1994; 33:7472-7476. [PMID: 20941311 DOI: 10.1364/ao.33.007472] [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: 05/30/2023]
Abstract
A new nondestructive method for determination of the outer diameter of optical fibers is described. The principle of this technique is based on observing interference maxima in the scattered light from a fiber that is side illuminated by a laser beam at oblique incidence. This technique is easy to implement and can be applied to a fiber with an inhomogeneous and large core.
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Costa GD. Optical visualization of the velocity distribution in a laser-induced thermocapillary liquid flow. Appl Opt 1993; 32:2143-2151. [PMID: 20820359 DOI: 10.1364/ao.32.002143] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A liquid film of black oil is heated by a cw Gaussian laser beam. This process gives rise to time-increasing, axisymmetric temperature distribution with a maximum in the laser-beam axis. Because the surface tension is decreasing function of temperature, a centrifugal stress gradient and concurrent liquid flow build up in the liquid surface. This phenomenon (known as laser-induced thermocapillary liquid flow) is visualized in the far field of the reflected laser beam, where images microscopic bubbles traveling with the liquid appear as bright spots. Time-resolved experimental records show that the bubbles's images follow rectilinear trajectories at an approximately constant speed. This result is explained by using the theoretical expression of velocity distribution in thermocapillary liquid flow.
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Abstract
Heavy hydrocarbons are irradiated with a Gaussian laser beam. The time-varying temperature distribution induced in the fluid gives rise to a surface-tension distribution. The later gives rise in turn to an accompanying liquid flow and surface-height distribution. In this paper, the time-varying shape of the induced depression is calculated as a function of the power distribution in the laser beam and of the thermal and mechanical properties of the material. The intensity distribution in the laser beam reflected from the depression is also calculated. Good agreement is found with previous experimental results.
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Abstract
Among applications of lasers in the petroleum industry are samples of heavy oils heated by a He-Ne laser beam. It is shown that laser power concentrations as low as 1 mW/mm(2) induce noticeable changes in the form of the surface. The far-field diffraction pattern of the reflected wave can be considered as a self-hologram of the hole, with the paraxial focus of the bottom of the hole as a point reference source. Annular images corresponding to different zones of the hole are reconstructed by illuminating the hologram with a spherical wave. A geometrical model of the shape of the irradiated surface is proposed and compared with experimental data.
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