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Rodrigues AC, David F, Guedes R, Rocha C, Oliveira HM. Dying with end stage kidney disease: factors associated with place of death on a palliative care program. J Bras Nefrol 2024; 46:93-97. [PMID: 37870397 PMCID: PMC10962416 DOI: 10.1590/2175-8239-jbn-2023-0015en] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 07/25/2023] [Indexed: 10/24/2023] Open
Abstract
INTRODUCTION End of life care of patients with end-stage kidney disease (ESKD) may be particularly challenging and requires the intervention of a specialized palliative care team (PCT). OBJECTIVE To characterize the population of ESKD patients referred to a PCT and evaluate the determinants of planned dying at home. METHODS We performed a retrospective observational cohort study of all patients with ESKD referred to our PCT between January 2014 and December 2021 (n = 60) and further characterized those with previously known ESKD regarding place of death (n = 53). RESULTS The majority of the patients were female and the median age was 84 years. Half of the patients were on conservative treatment, 43% were on chronic hemodialysis, and the remainder underwent hemodialysis on a trial basis and were subsequently suspended. Of those with previously known ESKD, 18% died at home and neither gender, age, cognition, performance status, comorbidities, CKD etiology, or treatment modality were associated with place of death. Anuria was significantly associated with dying at the hospital as was shorter time from dialysis suspension and death. Although not reaching statistical significance, we found a tendency towards a longer duration of palliative care follow-up in those dying at home. CONCLUSION Dying at home is possible in a palliative domiciliary program regardless of age, gender, etiology of CKD, major comorbidities, and treatment modality. Anuria and shorter survival from RRT withdrawal may be limiting factors for planned dying at home. A longer follow-up by palliative care may favor dying at home.
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Affiliation(s)
| | | | - Rita Guedes
- Hospital Pedro Hispano, Equipa de Cuidados Paliativos, Matosinhos,
Portugal
| | - Céu Rocha
- Hospital Pedro Hispano, Equipa de Cuidados Paliativos, Matosinhos,
Portugal
| | - Hugo M. Oliveira
- Hospital Pedro Hispano, Equipa de Cuidados Paliativos, Matosinhos,
Portugal
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2
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Cruz IO, Rocha C, Oliveira HM. Palliative care in heart failure. Rev Port Cardiol 2022; 41:409-413. [DOI: 10.1016/j.repc.2021.03.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 02/24/2021] [Accepted: 03/02/2021] [Indexed: 10/18/2022] Open
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Cordeiro L, Cabrita ARJ, Oliveira HM, Maia MRG, Rodrigues JA, Fonseca AJM, Valente IM. A Novel Approach for Monitoring the Volatile Metabolome in Biological Samples from Ruminants through Miniaturized Liquid-Liquid Extraction and Multiclass Gas Chromatography Analysis. J Agric Food Chem 2022; 70:3886-3897. [PMID: 35298153 PMCID: PMC9776526 DOI: 10.1021/acs.jafc.1c06662] [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] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A straightforward and versatile methodology for the extraction of volatile metabolites in biological samples from ruminants for gas chromatography analysis is proposed. The methodology was applied in the determination of multiclass metabolites (short-chain fatty acids, aldehydes, alcohols, ketones, esters, phenols, and sulfides) in different analytical matrices (rumen fluid, urine, and feces) collected from Holstein cows. The 24 multiclass volatile metabolites reported in the different biological samples and their respective concentrations were critically discussed in the context of digestive physiology. Most detected compounds are derived from the rumen and lower gut fermentation of carbohydrates, proteins, and lipids or their metabolism, being consistent with the prior state of the art. The proposed method also takes advantage of the already existing tools in animal nutrition laboratories, providing a novel methodological ground that can generate relevant bioanalytical information with a significant impact on ruminant's nutritional studies.
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Affiliation(s)
- Liliana Cordeiro
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Ana R J Cabrita
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Hugo M Oliveira
- INL, International Iberian Nanotechnology Laboratory, Avenida Mestre José Veiga s/n, 4715-330 Braga, Portugal
| | - Margarida R G Maia
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - José A Rodrigues
- REQUIMTE, LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
| | - António J M Fonseca
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Inês M Valente
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
- REQUIMTE, LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
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Santos FSD, Carneiro MA, Dias IO, Sudário LC, Andrade RM, Oliveira HM, Oliveira HM. DIAGNÓSTICO DE LEUCEMIA MIELOMONOCÍTICA CRÔNICA EM PACIENTE COM INFECÇÃO PELO NOVO CORONAVÍRUS: RELATO DE CASO. Hematol Transfus Cell Ther 2021. [PMCID: PMC8530610 DOI: 10.1016/j.htct.2021.10.920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
Discussão
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Carneiro MA, Santos FSD, Dias IO, Sudario LC, Andrade RM, Oliveira HM. LINFOHISTIOCITOSE HEMOFAGOCÍTICA COMO PRIMEIRA MANIFESTAÇÃO DE LINFOMA DE CÉLULAS T PERIFÉRICO: RELATO DE CASO. Hematol Transfus Cell Ther 2021. [DOI: 10.1016/j.htct.2021.10.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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6
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Dias IO, Carneiro MA, Santos FSD, Andrade RM, Sudário LC, Porto THA, Muzzi GC, Oliveira HM, Costa AL, Lara LA. TRMBOCITEMIA-TROMBÓTICA INDUZIDA POR VACINA AD26.COV2.S. Hematol Transfus Cell Ther 2021. [DOI: 10.1016/j.htct.2021.10.893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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7
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Rodrigues ARF, Maia MRG, Cabrita ARJ, Oliveira HM, Bernardo M, Lapa N, Fonseca I, Trindade H, Pereira JL, Fonseca AJM. Assessment of potato peel and agro-forestry biochars supplementation on in vitro ruminal fermentation. PeerJ 2020; 8:e9488. [PMID: 33194323 PMCID: PMC7394066 DOI: 10.7717/peerj.9488] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 06/15/2020] [Indexed: 11/20/2022] Open
Abstract
Background The awareness of environmental and socio-economic impacts caused by greenhouse gas emissions from the livestock sector leverages the adoption of strategies to counteract it. Feed supplements can play an important role in the reduction of the main greenhouse gas produced by ruminants—methane (CH4). In this context, this study aims to assess the effect of two biochar sources and inclusion levels on rumen fermentation parameters in vitro. Methods Two sources of biochar (agro-forestry residues, AFB, and potato peel, PPB) were added at two levels (5 and 10%, dry matter (DM) basis) to two basal substrates (haylage and corn silage) and incubated 24-h with rumen inocula to assess the effects on CH4 production and main rumen fermentation parameters in vitro. Results AFB and PPB were obtained at different carbonization conditions resulting in different apparent surface areas, ash content, pH at the point of zero charge (pHpzc), and elemental analysis. Relative to control (0% biochar), biochar supplementation kept unaffected total gas production and yield (mL and mL/g DM, p = 0.140 and p = 0.240, respectively) and fermentation pH (p = 0.666), increased CH4production and yield (mL and mL/g DM, respectively, p = 0.001) and ammonia-N (NH3-N, p = 0.040), and decreased total volatile fatty acids (VFA) production (p < 0.001) and H2 generated and consumed (p ≤ 0.001). Biochar sources and inclusion levels had no negative effect on most of the fermentation parameters and efficiency. Acetic:propionic acid ratio (p = 0.048) and H2 consumed (p = 0.019) were lower with AFB inclusion when compared to PPB. Biochar inclusion at 10% reduced H2 consumed (p < 0.001) and tended to reduce total gas production (p = 0.055). Total VFA production (p = 0.019), acetic acid proportion (p = 0.011) and H2 generated (p = 0.048) were the lowest with AFB supplemented at 10%, no differences being observed among the other treatments. The basal substrate affected most fermentation parameters independently of biochar source and level used. Discussion Biochar supplementation increased NH3-N content, iso-butyric, iso-valeric and valeric acid proportions, and decreased VFA production suggesting a reduced energy supply for microbial growth, higher proteolysis and deamination of substrate N, and a decrease of NH3-N incorporation into microbial protein. No interaction was found between substrate and biochar source or level on any of the parameters measured. Although AFB and PPB had different textural and compositional characteristics, their effects on the rumen fermentation parameters were similar, the only observed effects being due to AFB included at 10%. Biochar supplementation promoted CH4 production regardless of the source and inclusion level, suggesting that there may be other effects beyond biomass and temperature of production of biochar, highlighting the need to consider other characteristics to better identify the mechanism by which biochar may influence CH4 production.
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Affiliation(s)
- Ana R F Rodrigues
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Margarida R G Maia
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Ana R J Cabrita
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Hugo M Oliveira
- INL, International Iberian Nanotechnology Laboratory, Braga, Portugal
| | - Maria Bernardo
- REQUIMTE, LAQV, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Nuno Lapa
- REQUIMTE, LAQV, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Isabel Fonseca
- REQUIMTE, LAQV, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Henrique Trindade
- CITAB, Universidade de Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - José L Pereira
- CITAB, Universidade de Trás-os-Montes e Alto Douro, Vila Real, Portugal.,ESAV, Instituto Politécnico de Viseu, Viseu, Portugal
| | - António J M Fonseca
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
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8
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Oliveira HM, Pinheiro AQ, Fonseca AJM, Cabrita ARJ, Maia MRG. Flexible and expeditious assay for quantitative monitoring of alpha-amylase and amyloglucosidase activities. MethodsX 2019; 6:246-258. [PMID: 30792966 PMCID: PMC6370546 DOI: 10.1016/j.mex.2019.01.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 01/13/2019] [Indexed: 11/27/2022] Open
Abstract
The monitoring of the activity of alpha-amylase and amyloglucosidase is an important tool for studying their role in the hydrolysis of starch. Here we introduced an improved method capable to measure the activity of alpha-amylase and amyloglucosidase from different sources based on a quantitative starch-iodine assay. The developments of the assay sought the consistent preparation of the reagents, the rescale of the assay and the adjustment of the sensitivity. This was complemented by a glucose yield assay for amyloglucosidase that allowed a secondary source of information when insoluble starches were studied. The proposed method showed high precision in long-term use (RSD < 6.3%). Furthermore, all experimental conditions can be adapted according to the equipment available at each laboratory, transforming this method in a broadband analytical tool for screening alpha-amylase and amyloglucosidase activities. Tailorable assay based on the starch-iodine staining for the determination of alpha-amylase and amyloglucosidase activities. Enhanced consistence of reagent preparation. High intra-day and inter-day reproducibility.
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Affiliation(s)
- Hugo M Oliveira
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Alice Q Pinheiro
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - António J M Fonseca
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Ana R J Cabrita
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Margarida R G Maia
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
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9
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Oliveira HM, Pinheiro AQ, Fonseca AJM, Cabrita ARJ, Maia MRG. The intensification of amyloglucosidase-based saccharification by ultrasound. Ultrason Sonochem 2018; 49:128-136. [PMID: 30100267 DOI: 10.1016/j.ultsonch.2018.07.040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 05/22/2018] [Revised: 07/26/2018] [Accepted: 07/27/2018] [Indexed: 06/08/2023]
Abstract
The present report studied the role of ultrasound (US) energy in the amyloglucosidase-based starch hydrolysis using two complementary approaches: (i) in the activity of six commercially-available amyloglucosidases (using soluble starch as substrate), and (ii) in the hydrolysis of four pure starches from different botanical sources. This corresponds to the first systematic evaluation of the role of US in starch hydrolysis mediated by amyloglucosidase, being a consequence of our previous report that assessed the effect of US in the activity of alpha-amylase (LWT - Food Science and Technology 84 (2017) 674-685). Regarding amlyloglucosidases, three enzymes obtained from Aspergillus niger (AN1-AN3), and Spirizyme Achieve (SPA), Spirizyme Fuel (SPF) and Spirizyme Ultra (SPU) were submitted to a Box-Behnken experimental design in order to establish the optimum conditions for their maximum activity. In the presence of US, we found both inactivation and activation, ranging from -88% (AN3) to 699% (SPA). The US promoted the enzyme activity when combined with lower temperatures (40-60 °C), with a marked effect in Spirizyme enzymes. Based on the optimum conditions established by the experimental design, we also evaluated the role of US in the glucose yield resulting from the hydrolysis of pure starches (corn, rice, potato, wheat). In this case, US led to higher glucose yields in all conditions tested. The enhancement factors observed ranged from 1.2 (AN1, rice starch) to 65 (SPA, potato starch) times. We compared these findings with previous reports, which highlighted the role of US in intensifying amyloglucosidase-based saccharification in mild conditions, by simultaneously influencing both enzyme and substrate. Hence, US power has to be fine-tuned for each particular enzyme in order to maximize process intensification.
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Affiliation(s)
- Hugo M Oliveira
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Alice Q Pinheiro
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - António J M Fonseca
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Ana R J Cabrita
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Margarida R G Maia
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
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Valente IM, Cabrita ARJ, Malushi N, Oliveira HM, Papa L, Rodrigues JA, Fonseca AJM, Maia MRG. Unravelling the phytonutrients and antioxidant properties of European Vicia faba L. seeds. Food Res Int 2018; 116:888-896. [PMID: 30717020 DOI: 10.1016/j.foodres.2018.09.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 08/27/2018] [Accepted: 09/08/2018] [Indexed: 12/30/2022]
Abstract
For the first time, seven European varieties of Vicia faba L. seeds were investigated for (1) their phytonutrients profile by HPLC-DAD-MS/MS, (2) total phenolic content (TPC), and (3) antioxidant capacity (DPPH and FRAP assays). A wide range of compounds were identified, namely alkaloids, organic acids, terpenoids, jasmonates, and phenolics; these two latter being the most abundant. TPC ranged between 2.62 and 4.3 mg (gallic acid equivalent) g-1 dry weight, for V. faba major variety Belshi and V. faba minor variety Bauska, respectively. The DPPH radical scavenging capacity showed poor correlation (r = 0.550, P = .041) with TPC, suggesting the presence of other antioxidant sources than phenolics. Still, FRAP was positively correlated with TPC (r = 0.709, P < .01) and DPPH (r = 0.819, P < .01). These results elucidated the phytonutrients and antioxidant properties of V. faba L. seeds as functional food sources.
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Affiliation(s)
- Inês M Valente
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; REQUIMTE, LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal.
| | - Ana R J Cabrita
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Nertila Malushi
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; Department of Animal Production, Agricultural University of Tirana, Koder Kamez 1001, Albania
| | - Hugo M Oliveira
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Lumturi Papa
- Department of Animal Production, Agricultural University of Tirana, Koder Kamez 1001, Albania
| | - José A Rodrigues
- REQUIMTE, LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
| | - António J M Fonseca
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Margarida R G Maia
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
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Valente IM, Maia MRG, Malushi N, Oliveira HM, Papa L, Rodrigues JA, Fonseca AJM, Cabrita ARJ. Profiling of phenolic compounds and antioxidant properties of European varieties and cultivars of Vicia faba L. pods. Phytochemistry 2018; 152:223-229. [PMID: 29787901 DOI: 10.1016/j.phytochem.2018.05.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [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: 03/02/2018] [Revised: 05/09/2018] [Accepted: 05/12/2018] [Indexed: 05/27/2023]
Abstract
Vicia faba L. pods are a by-product generated from the industrial processing of beans for human and animal consumption. As phenolic compounds may play important roles in health, the present work envisaged the phenolic characterization of seven European varieties and cultivars of V. faba (major and minor) pods and the assessment of their antioxidant activity. The V. faba methanolic extracts were characterized by HPLC-DAD-MS/MS for identification of polyphenolic compounds. The total phenolic content and antioxidant capacity of the extracts were evaluated by colorimetric methods (Folin-Ciocalteu, DPPH scavenging capacity assay, and FRAP assay). Main compounds identified by HPLC-DAD-MS/MS were derivatives of caffeic acid, coumaric acid and kaempferol. The broad bean Jögeva variety presented the highest content of free and esterified phenolics (26.3 and 26.7 mg 100 g-1 dry weight, respectively), followed by the horse bean varieties Bauska and Lielplatones. These results were corroborated by the analysis of total phenolic content, DPPH scavenging capacity and FRAP. This study confirmed the rich phenolic content of V. faba pods suggesting to be an interesting novel source for animal nutrition, promoting product quality and consumers' health.
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Affiliation(s)
- Inês M Valente
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal; REQUIMTE, LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007, Porto, Portugal.
| | - Margarida R G Maia
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Nertila Malushi
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal; Department of Animal Production, Agricultural University of Tirana, Koder Kamez, 1001, Albania
| | - Hugo M Oliveira
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Lumturi Papa
- Department of Animal Production, Agricultural University of Tirana, Koder Kamez, 1001, Albania
| | - José A Rodrigues
- REQUIMTE, LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007, Porto, Portugal
| | - António J M Fonseca
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Ana R J Cabrita
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
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Pereira SA, Jerônimo GT, Marchiori NC, Oliveira HM, Jesus GFA, Schmidt EC, Bouzon ZL, Vieira FN, Martins ML, Mouriño JLP. Tadpoles fed supplemented diet with probiotic bacterium isolated from the intestinal tract of bullfrog Lithobates catesbeianus: Haematology, cell activity and electron microscopy. Microb Pathog 2017; 114:255-263. [PMID: 29174701 DOI: 10.1016/j.micpath.2017.11.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 02/23/2017] [Revised: 10/17/2017] [Accepted: 11/22/2017] [Indexed: 11/24/2022]
Abstract
The aim of this study is to select and isolate autochthonous bacteria with probiotic potential for use in a supplemented diet for bullfrog tadpoles, Lithobates catesbeianus. A total of 20 strains of lactic acid bacteria were isolated. Nine out of these were used in the following in vitro assays: antagonism against pathogenic bacteria (ANT), antimicrobial activity from extracellular compounds (MIC), tolerance to bile salts (TBS), pH reduction, protease production, sensitivity to antimicrobial tetracycline, cell viability, growth rate and doubling time. Using these data was defined an ideotype (ideal strain) based on the best results. Distances were estimated with the Mahalanobis (D2) test, and the best candidates, presenting the shortest ideotype distances, were considered to be used. The best strain was found to be Lactobacillus plantarum because it presented 10.00 ± 0.50 mm of ANT against Aeromonas hydrophila, 3.99 ± 0.01 of MIC independent of pathogenic bacteria, 85.07 ± 0.01 of TBS, 4.20 ± 0.02 of final pH, 17.67 ± 1.15 of protease production, 13.50 ± 2.00 sensitivity to antimicrobial tetracycline, 9.36 ± 0.04 of cell viability, 0.20 ± 0.00 of growth rate and 3.46 ± 0.00 doubling time. Therefore this probiotic candidate was then supplemented (2.045 ± 1.07 × 107 colony forming unities. g-1) into the diets of bullfrog tadpoles for a period of 42 days. At the end of the trial, samples of blood and intestines were collected to verify the haematological alterations and the intestinal morphology using transmission and scanning electron microscopy. Tadpoles fed the supplemented diet showed successful lactic acid bacterium colonisation, an increased number of circulating thrombocytes, monocytes, eosinophil and LG-PAS+ and also an increase in the length and density of intestinal microvilli. This study shows the feasibility of using probiotics isolated from farmed bullfrogs as a supplement in the diets of tadpoles, providing a promising alternative for modulating the health of these animals.
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Affiliation(s)
- S A Pereira
- AQUOS - Aquatic Organisms Health Laboratory, Aquaculture Department, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, 88040-900, Florianópolis, SC, Brazil.
| | - G T Jerônimo
- AQUOS - Aquatic Organisms Health Laboratory, Aquaculture Department, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, 88040-900, Florianópolis, SC, Brazil; Aquatic Organisms Health Laboratory, Post Graduate in Aquaculture, Nilton Lins University, Av. Nilton Lins 3259, 69058-030, Manaus, AM, Brazil
| | - N C Marchiori
- EPAGRI - Company of Agricultural Research and Rural Extension of Santa Catarina, Rua Joaquim Garcia, s/n, 88340-000, Camboriú, SC, Brazil
| | - H M Oliveira
- AQUOS - Aquatic Organisms Health Laboratory, Aquaculture Department, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, 88040-900, Florianópolis, SC, Brazil
| | - G F A Jesus
- AQUOS - Aquatic Organisms Health Laboratory, Aquaculture Department, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, 88040-900, Florianópolis, SC, Brazil
| | - E C Schmidt
- Department of Cell Biology, Embryology and Genetics (BEG), Central Laboratory of Electron Microscopy, UFSC, Florianópolis, Brazil
| | - Z L Bouzon
- Department of Cell Biology, Embryology and Genetics (BEG), Central Laboratory of Electron Microscopy, UFSC, Florianópolis, Brazil
| | - F N Vieira
- LCM - Marine Shrimp Laboratory, Microbiology Section, Aquaculture Department, UFSC, Beco dos Coroas 503, Barra da Lagoa, 88061-600, Florianópolis, SC, Brazil
| | - M L Martins
- AQUOS - Aquatic Organisms Health Laboratory, Aquaculture Department, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, 88040-900, Florianópolis, SC, Brazil
| | - J L P Mouriño
- AQUOS - Aquatic Organisms Health Laboratory, Aquaculture Department, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, 88040-900, Florianópolis, SC, Brazil
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Oliveira HM, Correia VS, Segundo MA, Fonseca AJ, Cabrita AR. Does ultrasound improve the activity of alpha amylase? A comparative study towards a tailor-made enzymatic hydrolysis of starch. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2017.06.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Valente IM, Oliveira HM, Vaz CD, Ramos RM, Fonseca AJ, Cabrita AR, Rodrigues JA. Determination of ammonia nitrogen in solid and liquid high-complex matrices using one-step gas-diffusion microextraction and fluorimetric detection. Talanta 2017; 167:747-753. [DOI: 10.1016/j.talanta.2017.01.091] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 01/25/2017] [Accepted: 01/30/2017] [Indexed: 12/14/2022]
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Oliveira HM, Pereira C, Santos-Silva E, Pinto-Basto J, Vizcaíno JR, Pessegueiro-Miranda H. A New Mutation Causing Progressive Familiar Intrahepatic Cholestasis Type 3 in Association with Autoimmune Hepatitis. Eur J Case Rep Intern Med 2017; 4:000537. [PMID: 30755924 PMCID: PMC6346900 DOI: 10.12890/2016_000537] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 12/04/2016] [Indexed: 01/12/2023] Open
Abstract
Background Some patients exhibit features of both autoimmune hepatitis (AIH) and primary sclerosing cholangitis (PSC). Similarly, patients with progressive familial intrahepatic cholestasis type 3 (PFIC3) may share histological features with PSC. Case report We report the case of a 22-year-old man who, since he was 5 years of age, has presented with pruritus, an approximately ninefold elevation of aminotransferases, and γ-glutamyl transferase levels ~10 times the upper limit. Initially he was diagnosed with an overlap syndrome of small duct PSC plus AIH. However, fluctuations in liver enzymes were observed over the following years. Analysis of the ABCB4 gene indicated the diagnosis of PFIC3, revealing a mutation not previously reported. Conclusion With this case report we aim to describe a new mutation, raise awareness of this rare pathology and highlight the importance of genetic testing of the ABCB4 gene in patients with autoimmune liver disease (mainly small duct PSC) with incomplete response to immunosuppressive treatment. LEARNING POINTS
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Affiliation(s)
- Hugo M Oliveira
- Liver and Pancreatic Transplantation Unit, Centro Hospitalar do Porto - Hospital de Santo António, Porto, Portugal
| | - Cláudia Pereira
- Liver and Pancreatic Transplantation Unit, Centro Hospitalar do Porto - Hospital de Santo António, Porto, Portugal
| | - Ermelinda Santos-Silva
- Gastroenterology Unit, Pediatrics Division, Departamento da Criança e do Adolescente, Centro Materno-Infantil do Norte, Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar (ICBAS) - Universidade do Porto, Porto, Portugal
| | | | - José R Vizcaíno
- Pathology Unit, Centro Hospitalar do Porto - Hospital de Santo António Porto, Portugal
| | - Helena Pessegueiro-Miranda
- Liver and Pancreatic Transplantation Unit, Centro Hospitalar do Porto - Hospital de Santo António, Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar (ICBAS) - Universidade do Porto, Porto, Portugal.,Instituto de Saúde Publica da Universidade do Porto (ISPUP) - Universidade do Porto, Porto, Portugal
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Maia MRG, Marques S, Cabrita ARJ, Wallace RJ, Thompson G, Fonseca AJM, Oliveira HM. Simple and Versatile Turbidimetric Monitoring of Bacterial Growth in Liquid Cultures Using a Customized 3D Printed Culture Tube Holder and a Miniaturized Spectrophotometer: Application to Facultative and Strictly Anaerobic Bacteria. Front Microbiol 2016; 7:1381. [PMID: 27630632 PMCID: PMC5006086 DOI: 10.3389/fmicb.2016.01381] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 08/22/2016] [Indexed: 11/13/2022] Open
Abstract
Here we introduce a novel strategy for turbidimetric monitoring of bacterial growth in liquid culture. The instrumentation comprises a light source, a customized 3D printed culture tube holder and a miniaturized spectrophotometer, connected through optical cables. Due to its small footprint and the possibility to operate with external light, bacterial growth was directly monitored from culture tubes in a simple and versatile fashion. This new portable measurement technique was used to monitor the growth of facultative (Escherichia coli ATCC/25922, and Staphylococcus aureus ATCC/29213) and strictly (Butyrivibrio fibrisolvens JW11, Butyrivibrio proteoclasticus P18, and Propionibacterium acnes DSMZ 1897) anaerobic bacteria. For E. coli and S. aureus, the growth rates calculated from normalized optical density values were compared with those ones obtained using a benchtop spectrophotometer without significant differences (P = 0.256). For the strictly anaerobic species, a high precision (relative standard deviation < 3.5%) was observed between replicates up to 48 h. Regarding its potential for customization, this manifold could accommodate further developments for customized turbidimetric monitoring, such as the use of light-emitting diodes as a light source or flow cells.
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Affiliation(s)
- Margarida R G Maia
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do PortoPorto, Portugal; REQUIMTE, LAQV, DGAOT, Faculdade de Ciências, Universidade do PortoPorto, Portugal
| | - Sara Marques
- CIBIO, InBIO-Research Network in Biodiversity and Evolutionary Biology, Universidade do PortoVairão, Portugal; Departamento Clinicas Veterinárias - ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do PortoPorto, Portugal
| | - Ana R J Cabrita
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto Porto, Portugal
| | - R John Wallace
- Rowett Institute of Nutrition and Health, University of Aberdeen Aberdeen, UK
| | - Gertrude Thompson
- CIBIO, InBIO-Research Network in Biodiversity and Evolutionary Biology, Universidade do PortoVairão, Portugal; Departamento Clinicas Veterinárias - ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do PortoPorto, Portugal
| | - António J M Fonseca
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto Porto, Portugal
| | - Hugo M Oliveira
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto Porto, Portugal
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Morais SA, Oliveira HM, de Almeida JR, Eiras E, Silva AC, Gavina C. Giant high-pressure pulmonary artery aneurysm in an elderly patient with chronic obstructive pulmonary disease. Revista Portuguesa de Cardiologia (English Edition) 2016. [DOI: 10.1016/j.repce.2015.06.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Morais SA, Oliveira HM, de Almeida JR, Eiras E, Silva AC, Gavina C. Giant high-pressure pulmonary artery aneurysm in an elderly patient with chronic obstructive pulmonary disease. Rev Port Cardiol 2016; 35:183.e1-6. [PMID: 26922398 DOI: 10.1016/j.repc.2015.06.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 06/12/2015] [Indexed: 11/28/2022] Open
Abstract
The authors report the case of a 74-year-old man, with a history of chronic obstructive pulmonary disease (COPD), GOLD grade 3, stable for the past two decades, who was admitted to our center with severe right heart failure. The chest radiograph showed moderate heart enlargement mainly of the right atrium and pulmonary artery, similar to previous chest radiographs in the previous 20 years. The transthoracic echocardiogram showed a pulmonary artery aneurysm (PAA), dilatation of the right chambers with pulmonary artery systolic pressure of 52 mmHg, and preserved right ventricular systolic function. A thoracic computed tomography scan confirmed the presence of a giant PAA 72 mm in diameter. The patient was started on high-dose diuretics, with significant clinical improvement. After optimization of medical therapy right heart catheterization was carried out with the patient in optimal clinical condition, which revealed mild precapillary pulmonary hypertension with a mean pulmonary artery pressure of 26 mmHg. On the basis of the clinical and imaging findings a stable, giant, high-pressure, PAA was diagnosed secondary to pulmonary hypertension induced by COPD, with a 20-year follow-up without need for surgical repair, which helped in our decision to maintain medical surveillance. The recent onset of heart failure is explained by the unfavorable evolution of COPD. This case may change the attitude expressed in previous studies favoring the choice of an invasive approach to treat giant high-pressure PAAs, instead supporting the maintenance of medical treatment.
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Affiliation(s)
- Sandra A Morais
- Serviço de Medicina Interna, ULSM - Hospital Pedro Hispano, Matosinhos, Portugal.
| | - Hugo M Oliveira
- Serviço de Medicina Interna, ULSM - Hospital Pedro Hispano, Matosinhos, Portugal
| | - José R de Almeida
- Serviço de Medicina Interna, ULSM - Hospital Pedro Hispano, Matosinhos, Portugal
| | - Eduardo Eiras
- Serviço de Medicina Interna, ULSM - Hospital Pedro Hispano, Matosinhos, Portugal
| | - Ana Catarina Silva
- Serviço de Radiologia, ULSM - Hospital Pedro Hispano, Matosinhos, Portugal
| | - Cristina Gavina
- Serviço de Cardiologia, ULSM - Hospital Pedro Hispano, Matosinhos, Portugal
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Oliveira HM, Pereira C, Santos Silva E, Pinto-Basto J, Pessegueiro Miranda H. Elevation of gamma-glutamyl transferase in adult: Should we think about progressive familiar intrahepatic cholestasis? Dig Liver Dis 2016; 48:203-5. [PMID: 26699824 DOI: 10.1016/j.dld.2015.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 10/19/2015] [Accepted: 11/03/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND There are three types of progressive familial intrahepatic cholestasis (PFIC). Type 3 is characterized by elevated gamma-glutamyl transferase (γ-GT) and it can be diagnosed in adolescence/adulthood. The genetic defect of PFIC 3 appears to explain the pathogenesis of intrahepatic cholestasis of pregnancy (ICP). AIMS Draw attention to this rare disease, especially in adulthood, and clarify the association between ICP and PFIC 3. RESULTS We describe a series of cases from a Portuguese northern family with two brothers presenting chronic cholestasis since adolescence. Brother 1: since 15-years-old with pruritus and elevated γ-GT ∼6x. Brother 2: pre-term, due to severe maternal pruritus and jaundice, since 13-years-old with pruritus, jaundice and ∼8x γ-GT elevation. Common causes of cholestasis were excluded and liver histologies were nonspecific. Research for mutation on ABCB4 gene showed mutations in both alleles. CONCLUSION Disease and mechanisms that determine cholestasis are complex and their understanding may provide new therapeutics.
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Affiliation(s)
- Hugo M Oliveira
- Department of Internal Medicine, Unidade Local de Saúde de Matosinhos - Hospital Pedro Hispano, Senhora da Hora Matosinhos, Portugal.
| | - Cláudia Pereira
- Department of Internal Medicine, Centro Hospitalar do Porto - Hospital de Santo António, Porto, Portugal
| | - Ermelinda Santos Silva
- Division of Pediatric Gastroenterology, Department of Child and Adolescent, Centro Hospitalar do Porto - Hospital de Santo António, Porto, Portugal
| | | | - Helena Pessegueiro Miranda
- Department of Internal Medicine, Centro Hospitalar do Porto - Hospital de Santo António, Porto, Portugal; Liver and Pancreatic Transplantation Unit, Centro Hospitalar do Porto - Hospital de Santo António, Porto, Portugal; Instituto de Ciências Biomédicas Abel Salazar (ICBAS) - Universidade do Porto, Porto, Portugal; Instituto de Saúde Publica da Universidade do Porto (ISPUP) - Universidade do Porto, Porto, Portugal
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Osório MV, Marques SS, Oliveira HM, Barreiros L, Segundo MA. Fluorometric method based on molecular recognition solid-phase extraction for determination of riboflavin in milk and infant formula. J Food Compost Anal 2016. [DOI: 10.1016/j.jfca.2015.10.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Oliveira HM, Grand MM, Ruzicka J, Measures CI. Towards chemiluminescence detection in micro-sequential injection lab-on-valve format: A proof of concept based on the reaction between Fe(II) and luminol in seawater. Talanta 2015; 133:107-11. [DOI: 10.1016/j.talanta.2014.06.076] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 05/26/2014] [Accepted: 06/15/2014] [Indexed: 10/25/2022]
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Oliveira HM, Massano J. Doutor, não consigo ver! Um caso de cegueira cortical bilateral. Gal Clin 2014. [DOI: 10.22546/30/634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Oliveira HM, Segundo MA, Fonseca AJM, Cabrita ARJ. Combining ultrasound-assisted extraction and a microliter colorimetric assay for the streamlined determination of urea in animal feedstuff. J Agric Food Chem 2013; 61:9602-9608. [PMID: 24059828 DOI: 10.1021/jf403037y] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This paper proposes a novel analytical strategy for the routine determination of urea in animal feedstuffs, combining an ultrasound-assisted miniaturized extraction protocol with a microplate colorimetric assay based on the reaction between 4-dimethylaminobenzaldehyde and urea. In order to accelerate the extraction, we introduced an ultrasound-assisted miniaturized protocol and compared it with both classic and miniaturized alternatives. The potential interference of amino acids was bypassed by shifting the detection wavelength from 435 to 450 nm. Urea could be quantified in the range 0.05-1.00% (w/w) with high precision (RSD < 5%). The results were in agreement with a commercial enzymatic method, demonstrating the accuracy and selectivity of the assay. The miniaturization led to a 50 times downscale when compared to the official method, resulting in a reduction of at least 90% in chemical consumption per determination, contributing to a more "green" and sustainable analytical methodology.
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Affiliation(s)
- Hugo M Oliveira
- REQUIMTE, ICBAS, Instituto de Ciencias Biomédicas de Abel Salazar, and ‡REQUIMTE, Departamento de Química Aplicada, Faculdade de Farmácia, Universidade do Porto , Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
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Grand M, Oliveira HM, Ruzicka J, Measures C. Determination of dissolved zinc in seawater using micro-Sequential Injection lab-on-valve with fluorescence detection. Analyst 2011; 136:2747-55. [DOI: 10.1039/c1an15033b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Miró M, Oliveira HM, Segundo MA. Analytical potential of mesofluidic lab-on-a-valve as a front end to column-separation systems. Trends Analyt Chem 2011. [DOI: 10.1016/j.trac.2010.08.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Oliveira HM, Segundo MA, Lima JL, Miró M, Cerdà V. On-line renewable solid-phase extraction hyphenated to liquid chromatography for the determination of UV filters using bead injection and multisyringe-lab-on-valve approach. J Chromatogr A 2010; 1217:3575-82. [DOI: 10.1016/j.chroma.2010.03.035] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2009] [Revised: 03/12/2010] [Accepted: 03/23/2010] [Indexed: 10/19/2022]
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Oliveira HM, Segundo MA, Lima JLFC, Miró M, Cerdà V. Exploiting automatic on-line renewable molecularly imprinted solid-phase extraction in lab-on-valve format as front end to liquid chromatography: application to the determination of riboflavin in foodstuffs. Anal Bioanal Chem 2010; 397:77-86. [PMID: 20191267 DOI: 10.1007/s00216-010-3522-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2009] [Revised: 01/30/2010] [Accepted: 02/01/2010] [Indexed: 10/19/2022]
Abstract
In the present work, it is proposed, for the first time, an on-line automatic renewable molecularly imprinted solid-phase extraction (MISPE) protocol for sample preparation prior to liquid chromatographic analysis. The automatic microscale procedure was based on the bead injection (BI) concept under the lab-on-valve (LOV) format, using a multisyringe burette as propulsion unit for handling solutions and suspensions. A high precision on handling the suspensions containing irregularly shaped molecularly imprinted polymer (MIP) particles was attained, enabling the use of commercial MIP as renewable sorbent. The features of the proposed BI-LOV manifold also allowed a strict control of the different steps within the extraction protocol, which are essential for promoting selective interactions in the cavities of the MIP. By using this on-line method, it was possible to extract and quantify riboflavin from different foodstuff samples in the range between 0.450 and 5.00 mg L(-1) after processing 1,000 microL of sample (infant milk, pig liver extract, and energy drink) without any prior treatment. For milk samples, LOD and LOQ values were 0.05 and 0.17 mg L(-1), respectively. The method was successfully applied to the analysis of two certified reference materials (NIST 1846 and BCR 487) with high precision (RSD < 5.5%). Considering the downscale and simplification of the sample preparation protocol and the simultaneous performance of extraction and chromatographic assays, a cost-effective and enhanced throughput (six determinations per hour) methodology for determination of riboflavin in foodstuff samples is deployed here.
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Affiliation(s)
- Hugo M Oliveira
- REQUIMTE, Serviço de Química-Física, Faculdade de Farmácia, Universidade do Porto, Rua Aníbal Cunha, 164, 4099-030, Porto, Portugal
| | - Marcela A Segundo
- REQUIMTE, Serviço de Química-Física, Faculdade de Farmácia, Universidade do Porto, Rua Aníbal Cunha, 164, 4099-030, Porto, Portugal.
| | - José L F C Lima
- REQUIMTE, Serviço de Química-Física, Faculdade de Farmácia, Universidade do Porto, Rua Aníbal Cunha, 164, 4099-030, Porto, Portugal
| | - Manuel Miró
- Department of Chemistry, Faculty of Sciences, University of the Balearic Islands, Carretera de Valldemossa km 7.5, 07122, Palma, Illes Balears, Spain
| | - Victor Cerdà
- Department of Chemistry, Faculty of Sciences, University of the Balearic Islands, Carretera de Valldemossa km 7.5, 07122, Palma, Illes Balears, Spain
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Sallam HS, Oliveira HM, Gan HT, Herndon DN, Chen JDZ. Ghrelin improves burn-induced delayed gastrointestinal transit in rats. Am J Physiol Regul Integr Comp Physiol 2006; 292:R253-7. [PMID: 16959863 DOI: 10.1152/ajpregu.00100.2006] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [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: 01/16/2023]
Abstract
Delayed gastrointestinal transit is common in patients with severe burn. Ghrelin is a potent prokinetic peptide. We aimed at testing the effect of ghrelin on burn-induced delayed gastrointestinal transit in rats. Gastric emptying (GE), intestinal transit (IT), and colonic transit (CT) studies were performed in male Sprague-Dawley rats. Rats were randomized into two main groups as follows: sham injury and ghrelin-treated burn injury with doses of 0, 2, 5, and 10 nmol/rat ip 6 h after burn. Sham/burn injury was induced under anesthesia. Rats received a phenol red meal 20 min following ghrelin injection. Based on the most effective ghrelin dose, 1 mg/kg sc atropine was given 30 min before the ghrelin in one group of rats for each study. The rats in each group were killed 30-90 min later; their stomachs, intestines, and colons were harvested immediately, and the amount of phenol red recovered was measured. Percentage of gastric emptying (GE%) and geometric center for IT and CT were calculated. We found 1) severe cutaneous burn injury significantly delayed GE, IT, and CT compared with sham injury (P < 0.05); 2) ghrelin normalized both GE and IT, but not the CT; 3) the most effective dose of ghrelin was 2 nmol/rat; and 4) atropine blocked the prokinetic effects of ghrelin on GE% and IT. In conclusion, ghrelin normalizes burn-induced delayed GE and IT but has no effect on CT in rats. The prokinetic effects of ghrelin are exerted via the cholinergic pathway. Ghrelin may have a therapeutic potential for burn patients with delayed upper gastrointestinal transit.
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Affiliation(s)
- H S Sallam
- Division of Gastroenterology, Department of Internal Medicine and Surgery, University of Texas Medical Branch, Galveston, TX 77555, USA
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Oliveira HM, Segundo MA, Lima JLFC, Grassi V, Zagatto EAG. Kinetic enzymatic determination of glycerol in wine and beer using a sequential injection system with spectrophotometric detection. J Agric Food Chem 2006; 54:4136-40. [PMID: 16756338 DOI: 10.1021/jf060229j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A sequential injection system for the automatic determination of glycerol in wine and beer was developed. The method is based on the rate of formation of NADH from the reaction of glycerol and NAD+ catalyzed by the enzyme glycerol dehydrogenase in solution. The determination of glycerol was performed between 0.3 and 3.0 mmol L(-1) (0.028 and 0.276 g L(-1)), and good repeatability was attained (rsd < 3.6%, n = 5) for all samples tested. The determination rate was 54 h(-1), the reagent consumption was only 0.75 micromol of NAD+ and 5.4 ng of enzyme per assay, and the waste production was 2.12 mL per assay. Results obtained for samples were in agreement with those obtained with the batch enzymatic method.
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Affiliation(s)
- Hugo M Oliveira
- REQUIMTE, Serviço de Química-Física, Faculdade de Farmacia, Universidade do Porto, Rua Aníbal Cunha 164, 4099-030 Porto, Portugal
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Oliveira HM, Segundo MA, Reis S, Lima JLFC. Multi-Syringe Flow Injection System with In-Line Pre-Concentration for the Determination of Total Phenolic Compounds. Mikrochim Acta 2005. [DOI: 10.1007/s00604-005-0345-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Sousa R, Silvestre M, Almeida e Sousa L, Falcão F, Dias I, Silva T, De Oliveira C, Oliveira HM. Transvaginal ultrasonography and hysteroscopy in postmenopausal bleeding: a prospective study. Acta Obstet Gynecol Scand 2001; 80:856-62. [PMID: 11531638] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
OBJECTIVE To determine the diagnostic value of transvaginal ultrasonography and hysteroscopy in patients with postmenopausal bleeding. MATERIAL AND METHODS Between January 1, 1998 and June 30, 1999, 88 outpatient women with postmenopausal bleeding were enrolled in a prospective study. They underwent transvaginal ultrasonography and hysteroscopy, and were submitted to directed biopsy during hysteroscopy. Findings were classified as normal endometrium, suggestive of atrophy, focal abnormality (benign or suspicious), and diffuse thickness (benign or suspicious). Data was compared with the final diagnosis, established by histological examination, as atrophy, benign pathology, atypical hyperplasia and endometrial carcinoma. RESULTS Among 88 women enrolled, 15 were excluded because hysteroscopy was impossible, and four had abandoned the study. The histological findings were scanty material in 12 (17.4%), atrophy in 24 (34.8%), cystic atrophy in one (1.4%), normal endometrium in five (7.2%), tuberculous endometritis in one (1.4%), polyps in 12 (17.4%), leiomyoma in one (1.4%), non-atypical hyperplasia in three (4.3%), atypical hyperplasia in one (1.4%) and endometrial carcinoma in nine cases (13.0%). For the assessment of endometrial carcinoma, ultrasonography revealed sensitivity 77.8%, specificity 93.3%, positive predictive value 63.6%, negative predictive value 96.6%; and hysteroscopy revealed sensitivity of 88.9%, specificity 98.3%, positive predictive value 88.9%, negative predictive value 98.3%. The combined use of both methods revealed sensitivity 100%, specificity 91.7%, positive predictive value 64.3%, negative predictive value 100%. CONCLUSIONS Both imagiological methods were found to be useful screening tests for endometrial carcinoma. Hysteroscopy was a superior diagnostic procedure.
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Affiliation(s)
- R Sousa
- Department of Gynecology, University Hospital of Coimbra, 3049 Coimbra-Codex, Portugal
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Affiliation(s)
- O Real
- Ministerio da Saude, I.P.O.F.G. Centro de Oncologia de Coimbra, 3003, Coimbra Codex, Portugal.
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Belaisch J, Nappi C, Affinito P, De Gezelle H, Botelho M, Oliveira HM, Martinez-Oliveira J, Gonzaga F. [Effect of combined conjugated estrogen-medrogestone replacement therapy on lipid profiles, climacteric symptoms and the endometrium]. J Gynecol Obstet Biol Reprod (Paris) 2000; 29:29-40. [PMID: 10675831] [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: 02/15/2023]
Abstract
OBJECTIVE To assess the effects of continuous administration of conjugated estrogen combined with sequential administration of medrogestone on lipid profiles, climateric symptoms and endometrial tolerance. METHODS This multicenter open study was conducted for one year to assess the effects of a hormone replacement therapy (HRT) regimen using Premarin (0.625 mg/day 28d/28) combined with medrogestone 5mg for 12 days (d17-d28 of each 28-day cycle) on lipid profiles, climateric symptoms and cycle control in 228 post menopausal women with an intact uterus. The subjects were recruited in 23 centers in 7 countries in Europe and Asia. Serum lipid/lipoprotein levels were determined at baseline and at cycles 3, 6, 13; endometrium biopsies were performed at screening then at cycle 13. Climateric symptoms and bleeding patterns were recorded by the patients from daily diaries cards collected at baseline and at visits during cycle 3, 6, 9, and 13. RESULTS By cycle 3, the conjugated estrogen-medrogestone combination induced significant modifications of the lipid profile which were judged favorable. These modifications were maintained throughout treatment. All the baseline values were within normal limits. Mean variations compared with baseline values (expressed in mmol/l) after cycles 3, 6, and 13 were -0.46, -0.54, and -0.46 for total cholesterol (p<0.05), + 0.053, + 0.057, and + 0.078 for HDL-cholesterol (p<0.05) and -0.556, -0. 542, and -0.493 for LDL-cholesterol (p<0.001) respectively. VLDL-cholesterol levels were unchanged. Triglycerides increased significantly though moderately: + 0.12, + 0.15, and + 0.15 mmol/l at cycles 3, 6, and 13 respectively. Endometrial biopsies obtained at cycle 13 (n=195) did not reveal any endometrial hyperplasia. Withdrowal bleeding was predictable for a 6 to 7.4 day interval. The incidence of irregular bleeding varied from 7 to 33% and decreased progressively over the 13-cycle treatment. The incidence of amenorrhea increased from 14 to 52% over the 12 months studied. Finally, at each cycle, menopausal symptoms (mean number of hot flushes/day and Küpperman score) were significantly improved compared with the baseline. As expected, modifications were more pronounced after cycle 1, but improvements were maintained throughout the study. CONCLUSION Continuous administration of Premarin in combination with sequential administration of medrogestone was found to be an effective treatment for menopausal symptoms. It was associated with favorable modifications of the lipid profile and was safe for the endometrium.
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Affiliation(s)
- J Belaisch
- Hôpital Saint-Vincent-de-Paul, 75014 Paris, France
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Viana MB, Murao M, Ramos G, Oliveira HM, de Carvalho RI, de Bastos M, Colosimo EA, Silvestrini WS. Malnutrition as a prognostic factor in lymphoblastic leukaemia: a multivariate analysis. Arch Dis Child 1994; 71:304-10. [PMID: 7979521 PMCID: PMC1030006 DOI: 10.1136/adc.71.4.304] [Citation(s) in RCA: 112] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
One hundred and twenty eight Brazilian children with lymphoblastic leukaemia were intensively treated with a Berlin-Frankfurt-Munich based protocol. More children had a white cell count above 50 x 10(9)/l (31%) then observed in developed countries. After a median follow up of 31 months (11-58 months), the estimated probability of relapse free survival was 41% (7%) for the whole group. After adjustment in the Cox's multivariate model, malnutrition was the most significant adverse factor affecting duration of complete remission. Age above 8 years and high peripheral white cell count were also significant adverse factors. Among the nutritional indices, the height for age and weight for age z scores were both significant, whether the cut off points of z-2 or z = -1.28 were chosen to define malnutrition. A strong statistical association between the two indices was found; the contribution of height for age z score to the prediction of relapse free survival was more significant. Children with height for age z score < -2 had a relapse risk of 8.2 (95% confidence interval 3.1 to 21.9) relative to children with z score > -2. The results of this study suggest that socioeconomic and nutritional factors should be considered in the prognostic evaluation of children with leukaemia in developing countries.
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Affiliation(s)
- M B Viana
- Department of Paediatrics, Federal University of Minas Gerais, Brazil
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