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Toledo E, Félix C, Vicente TFL, Augusto A, Félix R, Toledo B, Silva J, Trindade C, Raimundo D, Lemos MFL. Seaweed Extracts to Control Postharvest Phytopathogenic Fungi in Rocha Pear. J Fungi (Basel) 2023; 9:jof9020269. [PMID: 36836383 PMCID: PMC9967800 DOI: 10.3390/jof9020269] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/13/2023] [Accepted: 02/14/2023] [Indexed: 02/22/2023] Open
Abstract
Fungal infections cause losses amounting to between 20 and 25% of the fruit industry's total outcome, with an escalating impact on agriculture in the last decades. As seaweeds have long demonstrated relevant antimicrobial properties against a wide variety of microorganisms, extracts from Asparagopsis armata, Codium sp., Fucus vesiculosus, and Sargassum muticum were used to find sustainable, ecofriendly, and safe solutions against Rocha pear postharvest fungal infections. Alternaria alternata, Botrytis cinerea, Fusarium oxysporum, and Penicillium expansum mycelial growth and spore germination inhibition activities were tested in vitro with five different extracts of each seaweed (n-hexane, ethyl acetate, aqueous, ethanolic, and hydroethanolic). An in vivo assay was then performed using the aqueous extracts against B. cinerea and F. oxysporum in Rocha pear. The n-hexane, ethyl acetate, and ethanolic extracts from A. armata showed the best in vitro inhibitory activity against B. cinerea, F. oxysporum, and P. expansum, and promising in vivo results against B. cinerea using S. muticum aqueous extract were also found. The present work highlights the contribution of seaweeds to tackle agricultural problems, namely postharvest phytopathogenic fungal diseases, contributing to a greener and more sustainable bioeconomy from the sea to the farm.
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Affiliation(s)
- Eloísa Toledo
- MARE-Marine and Environmental Sciences Centre & ARNET—Aquatic Research Network Associated Laboratory, ESTM, Polytechnic of Leiria, 2520-641 Peniche, Portugal
| | - Carina Félix
- MARE-Marine and Environmental Sciences Centre & ARNET—Aquatic Research Network Associated Laboratory, ESTM, Polytechnic of Leiria, 2520-641 Peniche, Portugal
| | - Tânia F. L. Vicente
- MARE-Marine and Environmental Sciences Centre & ARNET—Aquatic Research Network Associated Laboratory, ESTM, Polytechnic of Leiria, 2520-641 Peniche, Portugal
- REQUIMTE/LAQV, Laboratório de Farmacognosia, Faculdade de Farmácia, Universidade do Porto, 4050-313 Porto, Portugal
| | - Ana Augusto
- MARE-Marine and Environmental Sciences Centre & ARNET—Aquatic Research Network Associated Laboratory, ESTM, Polytechnic of Leiria, 2520-641 Peniche, Portugal
| | - Rafael Félix
- MARE-Marine and Environmental Sciences Centre & ARNET—Aquatic Research Network Associated Laboratory, ESTM, Polytechnic of Leiria, 2520-641 Peniche, Portugal
- REQUIMTE/LAQV, Laboratório de Farmacognosia, Faculdade de Farmácia, Universidade do Porto, 4050-313 Porto, Portugal
| | - Bernardo Toledo
- Departamento de Ecología Integrativa, Estación Biológica de Doñana (EBD), Consejo Superior de Investigaciones Científicas (CSIC), 41092 Sevilla, Spain
| | - Joana Silva
- MARE-Marine and Environmental Sciences Centre & ARNET—Aquatic Research Network Associated Laboratory, ESTM, Polytechnic of Leiria, 2520-641 Peniche, Portugal
| | | | | | - Marco F. L. Lemos
- MARE-Marine and Environmental Sciences Centre & ARNET—Aquatic Research Network Associated Laboratory, ESTM, Polytechnic of Leiria, 2520-641 Peniche, Portugal
- Correspondence:
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Dias JR, Sousa A, Augusto A, Bártolo PJ, Granja PL. Electrospun Polycaprolactone (PCL) Degradation: An In Vitro and In Vivo Study. Polymers (Basel) 2022; 14:polym14163397. [PMID: 36015652 PMCID: PMC9415937 DOI: 10.3390/polym14163397] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [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: 07/25/2022] [Revised: 08/15/2022] [Accepted: 08/17/2022] [Indexed: 11/16/2022] Open
Abstract
Polycaprolactone (PCL) is widely used in tissue engineering due to its interesting properties, namely biocompatibility, biodegradability, elastic nature, availability, cost efficacy, and the approval of health authorities such as the American Food and Drug Administration (FDA). The PCL degradation rate is not the most adequate for specific applications such as skin regeneration due to the hydrophobic nature of bulk PCL. However, PCL electrospun fiber meshes, due to their low diameters resulting in high surface area, are expected to exhibit a fast degradation rate. In this work, in vitro and in vivo degradation studies were performed over 90 days to evaluate the potential of electrospun PCL as a wound dressing. Enzymatic and hydrolytic degradation studies in vitro, performed in a static medium, demonstrated the influence of lipase, which promoted a rate of degradation of 97% for PCL meshes. In an in vivo scenario, the degradation was slower, although the samples were not rejected, and were well-integrated in the surrounding tissues inside the subcutaneous pockets specifically created.
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Affiliation(s)
- Juliana R. Dias
- Center for Rapid and Sustainable Product Development (CDRsp), Polytechnic Institute of Leiria, 2030-028 Marinha Grande, Portugal
- Correspondence:
| | - Aureliana Sousa
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, 4200-135 Porto, Portugal
- Instituto de Engenharia Biomédica (INEB), Universidade do Porto, 4200-135 Porto, Portugal
| | - Ana Augusto
- MARE-Marine and Environmental Sciences Center, ARNET, ESTM, Instituto Politécnico de Leiria, 2520-630 Peniche, Portugal
| | - Paulo J. Bártolo
- Singapore Center for 3D Printing, Nanyang Technological University, 22 Jurong West, Singapore 639798, Singapore
| | - Pedro L. Granja
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, 4200-135 Porto, Portugal
- Instituto de Engenharia Biomédica (INEB), Universidade do Porto, 4200-135 Porto, Portugal
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Augusto A, Miranda A, Costa L, Pinheiro J, Campos MJ, Raimundo D, Pedrosa R, Mitchell G, Niranjan K, Silva SF. A pilot plant scale testing of the application of seaweed‐based natural coating and modified atmosphere packaging for shelf‐life extension of fresh‐cut apple. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Ana Augusto
- MARE ‐ Centro de Ciências do Mar e do Ambiente, ESTM, Politécnico de Leiria, 2520‐641 Peniche Portugal
- Department of Food and Nutritional Sciences University of Reading Reading United Kingdom
- Centre for Rapid and Sustainable Product Development (CDRsp), Politécnico de Leiria, 2430‐028 Marinha Grande
| | - Andreia Miranda
- MARE ‐ Centro de Ciências do Mar e do Ambiente, ESTM, Politécnico de Leiria, 2520‐641 Peniche Portugal
| | - Leonor Costa
- iBET – Instituto de Biologia Experimental e Tecnológica, 2781‐901 Oeiras Portugal
| | - Joaquina Pinheiro
- MARE ‐ Centro de Ciências do Mar e do Ambiente, ESTM, Politécnico de Leiria, 2520‐641 Peniche Portugal
| | - Maria J. Campos
- MARE ‐ Centro de Ciências do Mar e do Ambiente, ESTM, Politécnico de Leiria, 2520‐641 Peniche Portugal
| | | | - Rui Pedrosa
- MARE ‐ Centro de Ciências do Mar e do Ambiente, ESTM, Politécnico de Leiria, 2520‐641 Peniche Portugal
| | - Geoffrey Mitchell
- Centre for Rapid and Sustainable Product Development (CDRsp), Politécnico de Leiria, 2430‐028 Marinha Grande
| | - Keshavan Niranjan
- Department of Food and Nutritional Sciences University of Reading Reading United Kingdom
| | - Susana F.J. Silva
- MARE ‐ Centro de Ciências do Mar e do Ambiente, ESTM, Politécnico de Leiria, 2520‐641 Peniche Portugal
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Augusto A, Miranda A, Crespo D, Campos MJ, Raimundo D, Pedrosa R, Mitchell G, Niranjan K, Silva SF. Preservation of fresh-cut Rocha Pear using Codium tomentosum extract. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112938] [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: 10/19/2022]
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Simões T, Ferreira J, Lemos MFL, Augusto A, Félix R, Silva SFJ, Ferreira-Dias S, Tecelão C. Argan Oil as a Rich Source of Linoleic Fatty Acid for Dietetic Structured Lipids Production. Life (Basel) 2021; 11:life11111114. [PMID: 34832990 PMCID: PMC8621445 DOI: 10.3390/life11111114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 09/22/2021] [Revised: 10/13/2021] [Accepted: 10/14/2021] [Indexed: 01/22/2023] Open
Abstract
Argan oil is rich in long-chain unsaturated fatty acids (FA), mostly oleic and linoleic, and natural antioxidants. This study addresses the production of low-calorie structured lipids by acidolysis reaction, in a solvent-free system, between caprylic (C8:0; system I) or capric (C10:0; system II) acids and argan oil, used as triacylglycerol (TAG) source. Three commercial immobilized lipases were tested: Novozym® 435, Lipozyme® TL IM, and Lipozyme® RM IM. Higher incorporation degree (ID) was achieved when C10:0 was used as acyl donor, for all the lipases tested. Lipozyme® RM IM yielded the highest ID for both systems (28.9 ± 0.05 mol.% C10:0, and 11.4 ± 2.2 mol.% C8:0), being the only catalyst able to incorporate C8:0 under the reaction conditions for biocatalyst screening (molar ratio 2:1 FA/TAG and 55 °C). The optimal conditions for Lipozyme® RM IM in system II were found by response surface methodology (66 °C; molar ratio FA/TAG of 4:1), enabling to reach an ID of 40.9 mol.% of C10:0. Operational stability of Lipozyme® RM IM in system II was also evaluated under optimal conditions, after eight consecutive 24 h-batches, with biocatalyst rehydration between cycles. The biocatalyst presented a half-life time of 103 h.
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Affiliation(s)
- Tiago Simões
- MARE-Marine and Environmental Sciences Centre, ESTM, Politécnico de Leiria, 2520-641 Peniche, Portugal; (T.S.); (J.F.); (M.F.L.L.); (A.A.); (R.F.); (S.F.J.S.)
| | - Jessica Ferreira
- MARE-Marine and Environmental Sciences Centre, ESTM, Politécnico de Leiria, 2520-641 Peniche, Portugal; (T.S.); (J.F.); (M.F.L.L.); (A.A.); (R.F.); (S.F.J.S.)
| | - Marco F. L. Lemos
- MARE-Marine and Environmental Sciences Centre, ESTM, Politécnico de Leiria, 2520-641 Peniche, Portugal; (T.S.); (J.F.); (M.F.L.L.); (A.A.); (R.F.); (S.F.J.S.)
| | - Ana Augusto
- MARE-Marine and Environmental Sciences Centre, ESTM, Politécnico de Leiria, 2520-641 Peniche, Portugal; (T.S.); (J.F.); (M.F.L.L.); (A.A.); (R.F.); (S.F.J.S.)
- CDRSP-Center for Rapid and Sustainable Product Development, Politécnico de Leiria, 2430-028 Marinha Grande, Portugal
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, Reading RG6 6AP, UK
| | - Rafael Félix
- MARE-Marine and Environmental Sciences Centre, ESTM, Politécnico de Leiria, 2520-641 Peniche, Portugal; (T.S.); (J.F.); (M.F.L.L.); (A.A.); (R.F.); (S.F.J.S.)
| | - Susana F. J. Silva
- MARE-Marine and Environmental Sciences Centre, ESTM, Politécnico de Leiria, 2520-641 Peniche, Portugal; (T.S.); (J.F.); (M.F.L.L.); (A.A.); (R.F.); (S.F.J.S.)
| | - Suzana Ferreira-Dias
- LEAF, Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, Universidade de Lisboa, 1349-017 Lisboa, Portugal;
| | - Carla Tecelão
- MARE-Marine and Environmental Sciences Centre, ESTM, Politécnico de Leiria, 2520-641 Peniche, Portugal; (T.S.); (J.F.); (M.F.L.L.); (A.A.); (R.F.); (S.F.J.S.)
- LEAF, Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, Universidade de Lisboa, 1349-017 Lisboa, Portugal;
- Correspondence:
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Augusto A, Santos C, Ferruzi J. Case report: congenital neutropenia. Resid Pediatr 2021. [DOI: 10.25060/residpediatr-2021.v11n3-217] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The term congenital neutropenia embrace a family neutropenic disorders, that can be permanent or intermittent, severe or pleasant, which can cause repercussions in other organ systems. Neutropenia can range from mild pyogenic infections to life-threatening sepsis, and each successive infection can leave permanent sequelae. The risk of infection is approximately inversely proportional to the circulating polymorphonuclear neutrophil count and is particularly high at counts below 0.2G/l. About half of the forms of congenital neutropenia, without extrahematopoietic manifestations and normal adaptive immunity, are due to mutations in neutrophil elastase. Some patients have severe permanent neutropenia and frequent infections early in life, while others have mild intermittent neutropenia. The difficulty in suspected diagnosis congenital neutropenia and, consequently, the time to start treatment can lead to infectious complications and put the patients’ life at risk.
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Simões T, Fonseca SB, Augusto A, Granada L, Ozório RO, Gonçalves JF, Pascoal LA, Silva JH, Lemos MF. Changes in fatty acid profile and chemical composition of meagre (Argyrosomus regius) fed with different lipid and selenium levels. EUR J LIPID SCI TECH 2016. [DOI: 10.1002/ejlt.201600016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Tiago Simões
- MARE; Marine and Environmental Sciences Centre; ESTM; Polytechnic Institute of Leiria; Peniche Portugal
| | - Sthelio B. Fonseca
- UFPB; CAPES PhD Scholarship-Process n° 0277-13-4; Federal University of Paraíba; Areia Paraiba Brazil
- UFCG; Federal University of Campina Grande; Pombal-PB Brazil
| | - Ana Augusto
- MARE; Marine and Environmental Sciences Centre; ESTM; Polytechnic Institute of Leiria; Peniche Portugal
| | - Luana Granada
- MARE; Marine and Environmental Sciences Centre; ESTM; Polytechnic Institute of Leiria; Peniche Portugal
| | - Rodrigo O.A. Ozório
- CIIMAR; University of Porto; Porto Portugal
- ICBAS; Abel Salazar Biomedical Sciences Institute; University of Porto; Porto Portugal
| | - José F.M. Gonçalves
- CIIMAR; University of Porto; Porto Portugal
- ICBAS; Abel Salazar Biomedical Sciences Institute; University of Porto; Porto Portugal
| | - Leonardo A.F. Pascoal
- CCHSA-UFPB, Social and Agrarian Human Sciences Centre; Federal University of Paraíba; Bananeiras Paraíba Brazil
| | | | - Marco F.L. Lemos
- MARE; Marine and Environmental Sciences Centre; ESTM; Polytechnic Institute of Leiria; Peniche Portugal
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Augusto A, Simões T, Pedrosa R, Silva SF. Evaluation of seaweed extracts functionality as post-harvest treatment for minimally processed Fuji apples. INNOV FOOD SCI EMERG 2016. [DOI: 10.1016/j.ifset.2015.10.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Caldeira D, Barra M, Ferreira A, Rocha A, Augusto A, Pinto FJ, Costa J, Ferreira JJ. Systematic review with meta-analysis: the risk of major gastrointestinal bleeding with non-vitamin K antagonist oral anticoagulants. Aliment Pharmacol Ther 2015; 42:1239-49. [PMID: 26434935 DOI: 10.1111/apt.13412] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [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] [Received: 07/12/2015] [Revised: 07/31/2015] [Accepted: 09/02/2015] [Indexed: 12/30/2022]
Abstract
BACKGROUND Gastrointestinal (GI) bleeding is a common complication among anticoagulated patients. Non-vitamin K antagonist oral anticoagulants (NOACs) are associated with increased risk of GI (major and clinically relevant non-major) bleeding. However, more information is needed regarding severe events. AIM To evaluate the risk of NOACs major GI bleeding. METHODS We searched for phase III randomised clinical trials (RCT) evaluating NOACs (apixaban, dabigatran, edoxaban and rivaroxaban) and reporting major GI bleeding events, in MEDLINE, Cochrane Library, SciELO collection and Web of Science databases (July 2015). Meta-analysis was performed to estimate risk ratio (RR) and 95% confidence intervals (95% CIs). Heterogeneity was assessed with the I(2) test. RESULTS A total of 23 studies were included. Among patients with atrial fibrillation, the risk of major GI bleeding was not different between NOACs and vitamin K antagonists (VKA) (RR 1.08, 95% CI 0.85-1.36, I(2) = 78%; 5 RCTs) or acetylsalicylic acid (RR 0.78, 95% CI 0.36-1.72; 1 RCT). Similar results were found for patients undergoing orthopaedic surgery and those with venous thromboembolism. NOACs were not found to increase the risk compared to low-molecular-weight heparin (LWMH) alone (RR 1.42, 95% CI 0.55-3.71, I(2) = 7%; 8 RCTs), the sequential treatment with LMWH-VKA (RR 0.77, 95% CI 0.49-1.21, I(2) = 43%; 7 RCTs) or placebo (RR 1.48, 95% CI 0.15-14.84, I(2) = 21%; 2 RCTs). CONCLUSION Despite previous evidence supporting the association of non-vitamin K antagonist oral anticoagulants and overall GI bleeding, non-vitamin K antagonist oral anticoagulants are not associated with increased risk of major GI bleeding compared to other anticoagulant drugs (with known increased risk of these events).
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Affiliation(s)
- D Caldeira
- Clinical Pharmacology Unit, Instituto de Medicina Molecular, Lisbon, Portugal.,Laboratory of Clinical Pharmacology and Therapeutics, Faculty of Medicine, University of Lisbon, Lisbon, Portugal.,Cardiology Department, Hospital Garcia de Orta, Almada, Portugal
| | - M Barra
- Clinical Pharmacology Unit, Instituto de Medicina Molecular, Lisbon, Portugal
| | - A Ferreira
- Clinical Pharmacology Unit, Instituto de Medicina Molecular, Lisbon, Portugal
| | - A Rocha
- Clinical Pharmacology Unit, Instituto de Medicina Molecular, Lisbon, Portugal
| | - A Augusto
- Clinical Pharmacology Unit, Instituto de Medicina Molecular, Lisbon, Portugal
| | - F J Pinto
- Cardiology Department, Faculty of Medicine, CCUL, CAML, Lisbon, Portugal
| | - J Costa
- Clinical Pharmacology Unit, Instituto de Medicina Molecular, Lisbon, Portugal.,Laboratory of Clinical Pharmacology and Therapeutics, Faculty of Medicine, University of Lisbon, Lisbon, Portugal.,Center for Evidence-Based Medicine, Faculty of Medicine, University of Lisbon, Lisbon, Portugal.,Portuguese Collaborating Center of the IberoAmerican Cochrane Network, Faculty of Medicine, University of Lisbon, Lisbon, Portugal
| | - J J Ferreira
- Clinical Pharmacology Unit, Instituto de Medicina Molecular, Lisbon, Portugal.,Laboratory of Clinical Pharmacology and Therapeutics, Faculty of Medicine, University of Lisbon, Lisbon, Portugal
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Mazzarelli CCM, Santos MR, Amorim RV, Augusto A. Effect of salinity on the metabolism and osmoregulation of selected ontogenetic stages of an amazon population of Macrobrachium amazonicum shrimp (Decapoda, Palaemonidae). BRAZ J BIOL 2015; 75:372-9. [DOI: 10.1590/1519-6984.14413] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 10/22/2013] [Indexed: 11/21/2022] Open
Abstract
Probably as a function of their wide geographical distribution, the different population of Macrobrachium amazonicum shrimp may present distinct physiological, biochemical, reproductive, behavioral, and ecological patterns. These differences are so accentuated that the existence of allopatric speciation has been suggested, although initial studies indicate that the genetic variability of populations happen at an intraspecific level. Among the biological responses described for M. amazonicum populations, those regarding osmoregulation and metabolism play a key role for being related to the occupation of diverse habitats. To this effect, we investigated osmoregulation through the role of free amino acids in cell volume control and metabolism, through oxygen consumption in larvae (zoeae I, II, V and IX) and/or post-larvae of a M. amazonicum population from Amazon, kept in aquaculture fish hatcheries in the state of São Paulo. The results add information regarding the existence of distinct physiological responses among M. amazonicum populations and suggest that possible adjustments to metabolism and to the use of free amino acids as osmolytes of the regulation of the larvae and post-larvae cell volume depend on the appearance of structures responsible for hemolymph osmoregulation like, for example, the gills. In this respect, we verified that zoeae I do not alter their metabolism due to the exposition to fresh or brackish water, but they reduce intracellular concentration of free amino acids when exposed to fresh water, what may suggest the inexistence or inefficient performance of the structures responsible for volume regulation and hemolymph composition. On the other hand, in zoeae II and V exposed to fresh and brackish water, metabolism alterations were not followed by changes in free amino acids concentration. Thus it is possible, as the structures responsible for osmoregulation and ionic regulation become functional, that the role of free amino acids gets diminished and oxygen consumption elevated, probably due to greater energy expenditure with the active transportation of salts through epithelial membranes. Osmotic challenges also seem to alter throughout development, given that in zoeae II oxygen consumption is elevated on brackish water of 18, but in zoeae V it happens in fresh water. After M. amazonicum metamorphosis, free amino acids begin to play an important role as intracellular osmolytes, because we verified an increase of up to 40% in post-larvae exposed to brackish water of 18. The main free amino acids involved in cell volume regulation of ontogenetic stages evaluated were the non essential ones: glutamic acid, glycine, alanine, arginine, and proline. Interestingly, larvae from estuarine population studied here survived until the zoeae V stage in fresh water, but in some populations far from the sea, zoeae die right after eclosion in fresh water or they do not reach zoeae III stage. In addition, given that in favorable conditions caridean shrimp larvae shorten their development, we may infer that the cultivation environment, in which larvae developed in the present work, was appropriate, because almost all zoeae VIII kept on brackish water underwent metamorphosis directly to post-larvae and did not go through zoeae IX stage.
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Affiliation(s)
- CCM. Mazzarelli
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Brazil
| | - MR. Santos
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Brazil
| | - RV. Amorim
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Brazil
| | - A. Augusto
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Brazil
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Melis MS, Rocha ST, Augusto A. Steviol effect, a glycoside of Stevia rebaudiana, on glucose clearances in rats. BRAZ J BIOL 2009; 69:371-4. [DOI: 10.1590/s1519-69842009000200019] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2007] [Accepted: 12/29/2007] [Indexed: 11/22/2022] Open
Abstract
Stevia rebaudiana, a South American plant normally used as a natural herbal sweetener, has been suggested as exerting beneficial effects on human health, including as an antihypertensive and antihyperglycemic. The present experiment was undertaken to evaluate the renal excretion of steviol, the aglycone of several natural products extracted from the leaves of S. rebaudiana, and to clarify the actual participation of this compound on the renal excretion of glucose in rats, which has been previously suggested as the preferential action of steviol on the Na+-glucose renal tubular transport system. Steviol was obtained by enzymatic hydrolysis of stevioside with pectinase. Thirty normal male Wistar rats weighing 345 g were used. After a control period, steviol was infused iv at three doses (0.5, 1.0 and 3.0 mg.kg-1/h), according to classical clearance techniques. During all the experiments no significant changes in inulin clearance (Cin) and p-aminohipuric acid clearance (C PAH) were observed. Administration of steviol resulted in a statistically significant increase in the fractional sodium excretion (FeNa+), fractional potassium excretion (FeK+), urinary flow as percent of glomerular filtration rate (V/GFR) and glucose clearance (C G) when compared to controls, but these effects were absent with the dose of 0.5 mg.kg-1/h. The steviol clearance (C S) was higher than the Cin and lower than the C PAH at all the doses employed in this study. The data suggest that steviol is secreted by renal tubular epithelium, causing diuresis, natriuresis, kaliuresis and a fall in renal tubular reabsorption of glucose.
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Santos LCF, Belli NM, Augusto A, Masui DC, Leone FA, McNamara JC, Furriel RPM. Gill (Na+,K+)-ATPase in diadromous, freshwater palaemonid shrimps: Species-specific kinetic characteristics and α-subunit expression. Comp Biochem Physiol A Mol Integr Physiol 2007; 148:178-88. [PMID: 17521934 DOI: 10.1016/j.cbpa.2007.04.008] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2007] [Revised: 04/02/2007] [Accepted: 04/03/2007] [Indexed: 10/23/2022]
Abstract
To better comprehend physiological adaptation to dilute media and the molecular mechanisms underlying ammonia excretion in palaemonid shrimps, we characterized the (Na+,K+)-ATPase from Macrobrachium amazonicum gills, disclosing high- (K(0.5) = 4.2+/-0.2 micromol L(-1); V = 33.9+/-1.9 U mg(-1)) and low-affinity (K(0.5) = 0.144+/-0.010 mmol L(-1); V = 232.9+/-15.3 U mg(-1)) ATP hydrolyzing sites. Stimulation by Na+ (K(0.5) = 5.5+/-0.3 mmol L(-1); V = 275.1+/-15.1 U mg(-1)), Mg2+ (K(0.5) = 0.79+/-0.06 mmol L(-1); V = 261.9+/-18.3 U mg(-1)), K+ (K(M) = 0.88+/-0.04 mmol L(-1); V = 271.8+/-10.9 U mg(-1)) and NH4(+) (K(M) = 5.0+/-0.2 mmol L(-1); V = 385.9+/-15.8 U mg(-1)) obeys single saturation curves, activity being stimulated synergistically by NH4(+) and K+. There is a single K+ binding site, NH4(+) binding to a second, exclusive site, stimulating activity by 33%, modulating K+ affinity. (Na+,K+)-ATPase activity constitutes approximately 80% of total ATPase activity (K(Iouabain) = 147.5+/-8.9 micromol L(-1)); Na+-, K+-, Ca2+-, V- and F(o)F(1)-ATPases are also present. M. amazonicum microsomal fractions possess approximately 2-fold less (Na+,K+)-ATPase alpha-subunit than M. olfersi, consistent with a 2.6-fold lower specific activity. These differences in (Na+, K+)-ATPase stimulation by ATP and ions, and specific activities of other ATPases, suggest the presence of distinct biochemical adaptations to life in fresh water in these related species.
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Affiliation(s)
- L C F Santos
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14040-901, SP, Brazil
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13
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Ferrigno CR, Ribeiro AA, Rahal SC, Orsi AM, Fioreto ET, Castro MF, Mchado MR, Singaretti F, Ricardo C, Augusto A, Canavese S, Marcos A, Ticona E, Fernandes M, Rita M, Singareti F. Double aortic arch in a dog (Canis familiaris): a case report. Anat Histol Embryol 2001; 30:379-81. [PMID: 11820409 DOI: 10.1046/j.1439-0264.2001.00344.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [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: 11/20/2022]
Abstract
We herein report a case of a double aortic arch in a 10-week-old male dog of no defined race, which presented episodes of regurgitation at the time of weaning. This vascular malformation was characterized by the persistence of two aortic arches, right and left, of varying dimensions. The right aortic arch was observed to be larger. During post mortem examination the vessels of the animal were injected with coloured latex bi-centrifuged CIS 1-4 polisopreno which revealed the patency of the two aortic arches. Concomitantly, dilation of the cranial oesophagus causing constriction was observed, indicating megaesophagus. Apart from the constriction, the oesophagus presented normal morphometric parameters in relation to its dimensions.
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Affiliation(s)
- C R Ferrigno
- Health Sciences Institute (UNIP), Veterinary Medicine College, Sâo Paulo University (USP), Brazil
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14
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Abstract
The point prevalence of depression measured on one occasion between 2 and 5 months after childbirth was estimated to be 13.1% in 352 mothers living in urban Portugal; the criterion was a score of 13 or more on a translated version of the Edinburgh Post-natal Depression Scale (EPDS). More detailed comparisons were made between a subgroup of 118 mothers and 118 matched controls who had not borne a child in the previous 2 years. Post-natal women were twice as likely as non-childbearing controls to meet the EPDS criterion for depression In comparison with controls, they were also more severely depressed as judged by their total scores on another questionnaire, the Zung Scale. Comparisons of individual symptom scores (Zung Scale) showed that childbearing women, as a whole, reported more somatic symptoms than controls, but when only those women judged to be depressed or dysphoric by the EPDS were compared, this difference disappeared. Stepwise logistic analyses of symptoms contributing to the categorization of a 'case' of post-natal versus non-post- natal depression did not reveal any very clear divergences in self-reported psychopathology. In childbearing women, two factors were found significantly to contribute to higher depression scores; women with more children and those from lower socio-economic groups were most at risk.
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Affiliation(s)
- A Augusto
- Instituto de Cincias Biomédicas Abel Salazar, Porto, Portugal
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15
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Rocha V, Lebre R, Ferreira P, Cardoso A, Augusto A. [Superior mesenteric artery syndrome. Report of 2 clinical cases]. ACTA MEDICA PORT 1993; 6:47-50. [PMID: 8475788] [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: 01/31/2023]
Abstract
The authors describe two cases of the superior mesenteric artery syndrome. The diagnosis was made by radiology and both were treated surgically. They emphasize the most relevant symptoms (epigastric pain and vomiting) and the characteristic radiological signs which permit the diagnosis (marked to-and-fro peristalsis in the duodenum with extrinsic compression of the third part and proximal dilatation ending abruptly). Although the conservative measures are sufficient in most cases, those presented in this paper, both needed surgery.
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Affiliation(s)
- V Rocha
- Serviço de Cirurgia, Hospital Distrital de Setúbal
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