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Hill R, Madureira PA, Ferreira B, Baptista I, Machado S, Colaҫo L, Dos Santos M, Liu N, Dopazo A, Ugurel S, Adrienn A, Kiss-Toth E, Isbilen M, Gure AO, Link W. Retraction Note: TRIB2 confers resistance to anti-cancer therapy by activating the serine/threonine protein kinase AKT. Nat Commun 2023; 14:4341. [PMID: 37468494 DOI: 10.1038/s41467-023-40050-1] [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: 07/21/2023] Open
Affiliation(s)
- Richard Hill
- Department of Biomedical Sciences and Medicine (DCBM), University of Algarve, Campus de Gambelas, Faro, 8005-139, Portugal
- Centre for Biomedical Research (CBMR), University of Algarve, Campus de Gambelas, Faro, 8005-139, Portugal
- Brain Tumour Research Centre, Institute of Biomedical and Biomolecular Sciences, University of Portsmouth, PO1 2DT, Portsmouth, UK
| | - Patricia A Madureira
- Centre for Biomedical Research (CBMR), University of Algarve, Campus de Gambelas, Faro, 8005-139, Portugal
| | - Bibiana Ferreira
- Centre for Biomedical Research (CBMR), University of Algarve, Campus de Gambelas, Faro, 8005-139, Portugal
| | - Inês Baptista
- Centre for Biomedical Research (CBMR), University of Algarve, Campus de Gambelas, Faro, 8005-139, Portugal
| | - Susana Machado
- Centre for Biomedical Research (CBMR), University of Algarve, Campus de Gambelas, Faro, 8005-139, Portugal
| | - Laura Colaҫo
- Centre for Biomedical Research (CBMR), University of Algarve, Campus de Gambelas, Faro, 8005-139, Portugal
| | - Marta Dos Santos
- Centre for Biomedical Research (CBMR), University of Algarve, Campus de Gambelas, Faro, 8005-139, Portugal
| | - Ningshu Liu
- Bayer AG, Drug Discovery Oncology Research, Berlin, D-13342, Germany
| | - Ana Dopazo
- Genomics Unit, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, 28029, Spain
| | - Selma Ugurel
- Department of Dermatology, University Hospital Essen, Essen, 45147, Germany
| | - Angyal Adrienn
- Department of Cardiovascular Science, University of Sheffield, Sheffield, S10 2RX, UK
| | - Endre Kiss-Toth
- Department of Cardiovascular Science, University of Sheffield, Sheffield, S10 2RX, UK
| | - Murat Isbilen
- Department of Molecular Biology and Genetics, Bilkent University, Ankara, 06533, Turkey
| | - Ali O Gure
- Department of Molecular Biology and Genetics, Bilkent University, Ankara, 06533, Turkey
| | - Wolfgang Link
- Department of Biomedical Sciences and Medicine (DCBM), University of Algarve, Campus de Gambelas, Faro, 8005-139, Portugal.
- Centre for Biomedical Research (CBMR), University of Algarve, Campus de Gambelas, Faro, 8005-139, Portugal.
- Algarve Biomedical Center (ABC), University of Algarve, Campus de Gambelas, Faro, 8005-139, Portugal.
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Winther AK, Baptista I, Pedersen S, Randers MB, Johansen D, Krustrup P, Pettersen SA. Position specific physical performance and running intensity fluctuations in elite women's football. Scand J Med Sci Sports 2021; 32 Suppl 1:105-114. [PMID: 34825736 DOI: 10.1111/sms.14105] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 11/09/2021] [Accepted: 11/17/2021] [Indexed: 11/26/2022]
Abstract
The purpose of the present study was to investigate the physical performance of elite female football players during match play along with transient alterations in running performance following 1- and 5-min univariate peak periods. 54 elite female players from four top-level Norwegian teams were monitored for one season (n = 393 match observations), and physical performance data collected using STATSport GPS APEX. Results revealed significant differences in physical performance between the positions during full match play, particularly between wide and central players. Both full backs (FBs) and wide midfielders (WMs) covered more total distance (TD), high-speed running distance (HSRD), and sprint distance (SpD) than center backs (CBs) (p < 0.05-0.001), while WMs also covered more HSRD than both central midfielders (CMs) (p < 0.01) and forwards (FWs) (p < 0.05), and more acceleration -and deceleration distance (Accdist and Decdist ) than both CBs and CMs (p < 0.01-0.001). A similar pattern was observed for the peak period analysis, with FBs and WMs covering more SpD in peak 1 min than CBs and CM (p < 0.001) and more SpD in peak 5-min than CBs, CMs, and FWs (p < 0.001). Irrespective of the variable analyzed, greater distances were covered during the peak 5-min period than in the next-5 and mean 5-min periods (p < 0.001). Significant (p < 0.001), but small to trivial (Cohen's Dz : 0.07-0.20), decreases in distance covered were also observed for each variable following each univariate peak 5-min period. In conclusion, practitioners should account for differences in physical performance when developing training programs for female football players and be aware of transient reductions in physical performance following univariate peak 1- and 5-min periods. Specifically, the very high intensity in 1-min peak periods adds support to the principal of executing speed endurance activities during training to mirror and be prepared for the physical demands of match play.
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Affiliation(s)
- A K Winther
- School of Sport Sciences, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
| | - I Baptista
- Faculty of Sport, University of Porto, Porto, Portugal.,Department of Computer Science, Faculty of Science and Technology, UiT The Arctic University of Norway, Tromsø, Norway
| | - S Pedersen
- School of Sport Sciences, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
| | - M B Randers
- School of Sport Sciences, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway.,Department of Sports Science and Clinical Biomechanics, SDU Sport and Health Sciences Cluster (SHSC), University of Southern Denmark, Odense, Denmark
| | - D Johansen
- Department of Computer Science, Faculty of Science and Technology, UiT The Arctic University of Norway, Tromsø, Norway
| | - P Krustrup
- Department of Sports Science and Clinical Biomechanics, SDU Sport and Health Sciences Cluster (SHSC), University of Southern Denmark, Odense, Denmark.,Shangai University of Sport, Shanghai, China.,Sport and Health Sciences, University of Exeter, Exeter, UK.,Danish Institute for Advanced Study (DIAS), University of Southern Denmark, Odense, Denmark
| | - S A Pettersen
- School of Sport Sciences, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
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Grilo AM, Santos B, Baptista I, Monsanto F. Exploring the cancer patients' experiences during external radiotherapy: A systematic review and thematic synthesis of qualitative and quantitative evidence. Eur J Oncol Nurs 2021; 52:101965. [PMID: 34023669 DOI: 10.1016/j.ejon.2021.101965] [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: 11/22/2020] [Revised: 03/28/2021] [Accepted: 04/14/2021] [Indexed: 11/20/2022]
Abstract
PURPOSE To investigate the subjective experience of adult cancer patients undergoing external radiotherapy and provide evidence for better practices in radiotherapy services. METHODS A systematic review was performed according to the PRISMA Statement Guidelines. Qualitative and mixed studies were identified through five electronic databases (CINAHL, PsychINFO, Medline, Scopus and Web of Science), between March and April 2020, using defined criteria. Methodological quality assessment was conducted, and the data integrated into a thematic synthesis. RESULTS Of the 886 studies identified, 13 met our inclusion criteria. Patients experiences were described into four main themes: (1) Time, (2) Physical Environment, (3) Treatment Concerns and (4) Radiotherapy Team. Time refers to waiting time and treatment time; Physical Environment states temperature in the treatment room and equipment; Treatment Concerns included side effects, daily activities, positioning and immobilization and treatment preparation (e.g., bladder filling); radiotherapy team comprised patients support; response to patients needs and recognized team. The generating analytical phase of thematic analysis allowed us to recognize that the effectiveness of the radiotherapy team operates as a facilitator of the patients' experience. In contrast, time in the waiting room, the treatment preparation when is required, and the positioning and immobilization, specifically for the neck and head patients, act as barriers. CONCLUSION Four distinct themes were identified to be positively and negatively associated with patients' experience during external radiotherapy. The evidence provides valuable recommendations to improved radiotherapy services organization, as well as to the delivery of more patient-centred care adjusted to the concerns and needs of patients.
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Affiliation(s)
- Ana Monteiro Grilo
- H&TRC-Health & Technology Research Center, ESTeSL- Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, Portugal; CICPsi - Research Center for Psychological Science, Faculty of Psychology, University of Lisbon, Portugal.
| | - Bárbara Santos
- Medical Imaging and RT Degree, Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, Portugal.
| | - Inês Baptista
- Medical Imaging and RT Degree, Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, Portugal.
| | - Fátima Monsanto
- H&TRC-Health & Technology Research Center, ESTeSL- Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, Portugal.
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4
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Baptista I, Santos M, Rudnitskaya A, Saraiva JA, Almeida A, Rocha SM. A comprehensive look into the volatile exometabolome of enteroxic and non-enterotoxic Staphylococcus aureus strains. Int J Biochem Cell Biol 2019; 108:40-50. [PMID: 30648622 DOI: 10.1016/j.biocel.2019.01.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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: 06/07/2018] [Revised: 11/06/2018] [Accepted: 01/11/2019] [Indexed: 01/08/2023]
Abstract
Staphylococcal food poisoning is a disease that originates significant health and economic losses and is caused by Staphylococcus aureus strains able to produce enterotoxins. The aim of this work is to go further on the study of the volatile exometabolome of S. aureus using an advanced gas chromatographic technique. Enterotoxic and non-enterotoxic strains were assessed. The volatile exometabolome profile comprised 240 volatiles belonging to ten chemical families. This volatiles were mainly by-products of branched-chain amino acids and methionine degradation, pyruvate metabolism, diacetyl pathway, oxidative stress and carotenoid cleavage. Metabolites released by the first two pathways were produced in higher contents by the enterotoxic strains. This study add further insights to S. aureus volatile exometabolome, and also shows that by applying it, it is possible to distinguish strains of S. aureus by the number of produced enterotoxins, which is especially important from the food safety point of view.
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Affiliation(s)
- Inês Baptista
- Department of Biology and CESAM, University of Aveiro, 3810-193, Aveiro, Portugal; Department of Chemistry and QOPNA, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - Magda Santos
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - Alisa Rudnitskaya
- Department of Chemistry and CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - Jorge A Saraiva
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - Adelaide Almeida
- Department of Biology and CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - Sílvia M Rocha
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193, Aveiro, Portugal.
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Baptista I, Queirós RP, Cunha Â, Saraiva JA, Rocha SM, Almeida A. Inactivation of enterotoxic and non-enterotoxic Staphylococcus aureus strains by high pressure treatments and evaluation of its impact on virulence factors. Food Control 2015. [DOI: 10.1016/j.foodcont.2015.04.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Baptista I, Queirós RP, Cunha Â, Rocha SM, Saraiva JA, Almeida A. Evaluation of resistance development and viability recovery by toxigenic and non-toxigenic Staphylococcus aureus strains after repeated cycles of high hydrostatic pressure. Food Microbiol 2015; 46:515-520. [DOI: 10.1016/j.fm.2014.09.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 07/31/2014] [Accepted: 09/28/2014] [Indexed: 10/24/2022]
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Silva D, Martins O, Matos S, Lopes P, Rolo T, Baptista I. Histological and profilometric evaluation of the root surface after instrumentation with a new piezoelectric device - ex vivo study. Int J Dent Hyg 2014; 13:138-44. [PMID: 24995862 DOI: 10.1111/idh.12091] [Citation(s) in RCA: 4] [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] [Accepted: 05/30/2014] [Indexed: 11/26/2022]
Abstract
OBJECTIVES An ex vivo model was designed to profilometrically and histologically assess root changes resulting from scaling with a new ultrasonic device, designed for bone piezoelectric surgery, in comparison with curettes. METHODS Three groups of 10 periodontal hopeless teeth were each subjected to different root instrumentation: Gracey curettes (CUR); ultrasonic piezoelectric device, Perio 100% setting, level 8 (P100); and ultrasonic piezoelectric device Surg 50% setting, level 1 (S50). After extraction, all teeth were photographed to visually assess the presence of dental calculus. The treated root surfaces were profilometrically evaluated (Ra, Rz, Rmax). Undecalcified histological sections were prepared to assess qualitative changes in cementum thickness. Statistical analysis was carried out using one-way anova test with a significance level of 95%. RESULTS Both instruments proved to be effective in the complete removal of calculus. The CUR group presented the lowest Ra [2.28 μm (±0.58)] and S50 the highest [3.01 μm (±0.61)]. No statistically significant differences were detected among the three groups, for Ra, Rz and Rmax. Histologically, there was a cementum thickness reduction in all groups, being higher and more irregular in S50 group. CONCLUSIONS Within the limits of this study, there were no statistically significant differences in roughness parameters analyzed between curettes and the ultrasonic piezoelectric unit. This new instrument removes a smaller amount of cementum, mainly at the Perio 100% power setting, which appears to be the least damaging. The ultrasonic device is effective in calculus removal, proving to be as effective as curettes.
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Affiliation(s)
- D Silva
- Faculty of Medicine, Department of Dentistry, University of Coimbra, Coimbra, Portugal
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Cruz A, Henriques I, Sousa ACA, Baptista I, Almeida A, Takahashi S, Tanabe S, Correia A, Suzuki S, Anselmo AM, Mendo S. A microcosm approach to evaluate the degradation of tributyltin (TBT) by Aeromonas molluscorum Av27 in estuarine sediments. Environ Res 2014; 132:430-437. [PMID: 24858283 DOI: 10.1016/j.envres.2014.04.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 04/23/2014] [Accepted: 04/25/2014] [Indexed: 06/03/2023]
Abstract
Tributyltin (TBT) is a biocide extremely toxic to a wide range of organisms, which has been used for decades in antifouling paints. Despite its global ban in 2008, TBT is still a problem of great concern due to the high levels trapped in sediments. Aeromonas molluscorum Av27 is a TBT degrading bacterium that was isolated from an estuarine system. We investigated the ability and the role of this bacterium on TBT degradation in this estuarine system, using a microcosm approach in order to mimic environmental conditions. The experiment was established and followed for 150 days. Simultaneously, changes in the indigenous bacterial community structure were also investigated. The results revealed a maximum TBT degradation rate of 28% accompanied by the detection of the degradation products over time. Additionally, it was observed that TBT degradation was significantly enhanced by the presence of Av27. In addition a significantly higher TBT degradation occurred when the concentration of Av27 was higher. TBT degradation affected the bacterial community composition as revealed by the changes in the prevalence of Proteobacteria subdivisions, namely the increase of Deltaproteobacteria and the onset of Epsilonproteobacteria. However, the addition of Av27 strain did not affect the dominant phylotypes. Total bacterial number, bacterial biomass productivity, 16S rRNA gene and denaturing gradient gel electrophoresis (DGGE) analyses also indicated alterations on the bacterial community structure over time, with bacteria non-tolerant to pollutants increasing their representativeness, as, for instance, the increase of the number of Alphaproteobacteria clones from 6% in the beginning to 12% at the end of the experiment. The work herein presented confirms the potential of Av27 strain to be used in the decontamination of TBT-polluted environments.
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Affiliation(s)
- Andreia Cruz
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - Isabel Henriques
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Ana C A Sousa
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Inês Baptista
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Adelaide Almeida
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Shin Takahashi
- Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama 790-8577, Japan
| | - Shinsuke Tanabe
- Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama 790-8577, Japan
| | - António Correia
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Satoru Suzuki
- Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama 790-8577, Japan
| | - Ana Maria Anselmo
- Laboratório Nacional de Energia e Geologia, Unidade de Bioenergia, Estrada da Portela, Bairro do Zambujal, Apartado 7586-Alfragide, 2610-999 Amadora, Portugal
| | - Sónia Mendo
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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Santos AL, Baptista I, Gomes NCM, Henriques I, Almeida A, Correia A, Cunha A. Contribution of chemical water properties to the differential responses of bacterioneuston and bacterioplankton to ultraviolet-B radiation. FEMS Microbiol Ecol 2013; 87:517-35. [PMID: 24164491 DOI: 10.1111/1574-6941.12239] [Citation(s) in RCA: 8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 09/24/2013] [Accepted: 10/21/2013] [Indexed: 11/26/2022] Open
Abstract
The surface microlayer (SML) is characterized by different physicochemical properties from underlying waters (UW). However, whether these differences in abiotic factors underlie the distinct sensitivity of bacterioneuston (i.e. SML bacteria) and bacterioplankton to environmental stressors remains to be addressed. We investigated the contribution of abiotic factors to the UV-B sensitivity of bacterioneuston and bacterioplankton. Nutrients (especially nitrogen and phosphate) emerged as important determinants of bacterial UV-B sensitivity. The role of particles, nutrients, and dissolved organic components on bacterial UV-B sensitivity was further evaluated using dilution cultures. Filtered samples were twofold more UV sensitive than unfiltered samples, suggesting a UV-protective effect of particles. High nutrient concentrations attenuated bacterial UV-B sensitivity (up to 40%), compared with unamended conditions, by influencing bacterial physiology and/or community composition. Suspending cells in natural water, particularly from the SML, also attenuated UV-B sensitivity (up to 23%), compared with suspension in an artificial mineral solution. Bioassays using Pseudomonas sp. strain NT5I1.2B revealed that chemical water properties influence UV-induced oxidative damage. UV-B sensitivity was associated with high cell-specific activities. The chemical environment of the SML and UW influences UV-B effects on the corresponding bacterial communities. Maintaining low cell activities might be advantageous in stressful environments, like the SML.
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Affiliation(s)
- Ana L Santos
- Department of Biology and CESAM, University of Aveiro, Aveiro, Portugal
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Salvador ÂC, Baptista I, Barros AS, Gomes NCM, Cunha Â, Almeida A, Rocha SM. Can volatile organic metabolites be used to simultaneously assess microbial and mite contamination level in cereal grains and coffee beans? PLoS One 2013; 8:e59338. [PMID: 23613710 PMCID: PMC3628908 DOI: 10.1371/journal.pone.0059338] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Accepted: 02/13/2013] [Indexed: 11/18/2022] Open
Abstract
A novel approach based on headspace solid-phase microextraction (HS-SPME) combined with comprehensive two-dimensional gas chromatography–time-of-flight mass spectrometry (GC×GC–ToFMS) was developed for the simultaneous screening of microbial and mite contamination level in cereals and coffee beans. The proposed approach emerges as a powerful tool for the rapid assessment of the microbial contamination level (ca. 70 min versus ca. 72 to 120 h for bacteria and fungi, respectively, using conventional plate counts), and mite contamination (ca. 70 min versus ca. 24 h). A full-factorial design was performed for optimization of the SPME experimental parameters. The methodology was applied to three types of rice (rough, brown, and white rice), oat, wheat, and green and roasted coffee beans. Simultaneously, microbiological analysis of the samples (total aerobic microorganisms, moulds, and yeasts) was performed by conventional plate counts. A set of 54 volatile markers was selected among all the compounds detected by GC×GC–ToFMS. Principal Component Analysis (PCA) was applied in order to establish a relationship between potential volatile markers and the level of microbial contamination. Methylbenzene, 3-octanone, 2-nonanone, 2-methyl-3-pentanol, 1-octen-3-ol, and 2-hexanone were associated to samples with higher microbial contamination level, especially in rough rice. Moreover, oat exhibited a high GC peak area of 2-hydroxy-6-methylbenzaldehyde, a sexual and alarm pheromone for adult mites, which in the other matrices appeared as a trace component. The number of mites detected in oat grains was correlated to the GC peak area of the pheromone. The HS-SPME/GC×GC–ToFMS methodology can be regarded as the basis for the development of a rapid and versatile method that can be applied in industry to the simultaneous assessment the level of microbiological contamination and for detection of mites in cereals grains and coffee beans.
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Affiliation(s)
- Ângelo C. Salvador
- Departament of Chemistry, QOPNA, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Inês Baptista
- Departament of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - António S. Barros
- Departament of Chemistry, QOPNA, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Newton C. M. Gomes
- Departament of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Ângela Cunha
- Departament of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Adelaide Almeida
- Departament of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Silvia M. Rocha
- Departament of Chemistry, QOPNA, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
- * E-mail:
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Santos AL, Oliveira V, Baptista I, Henriques I, Gomes NCM, Almeida A, Correia A, Cunha Â. Wavelength dependence of biological damage induced by UV radiation on bacteria. Arch Microbiol 2012; 195:63-74. [PMID: 23090570 DOI: 10.1007/s00203-012-0847-5] [Citation(s) in RCA: 121] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Revised: 09/26/2012] [Accepted: 10/07/2012] [Indexed: 11/28/2022]
Abstract
The biological effects of UV radiation of different wavelengths (UVA, UVB and UVC) were assessed in nine bacterial isolates displaying different UV sensitivities. Biological effects (survival and activity) and molecular markers of oxidative stress [DNA strand breakage (DSB), generation of reactive oxygen species (ROS), oxidative damage to proteins and lipids, and the activity of antioxidant enzymes catalase and superoxide dismutase] were quantified and statistically analyzed in order to identify the major determinants of cell inactivation under the different spectral regions. Survival and activity followed a clear wavelength dependence, being highest under UVA and lowest under UVC. The generation of ROS, as well as protein and lipid oxidation, followed the same pattern. DNA damage (DSB) showed the inverse trend. Multiple stepwise regression analysis revealed that survival under UVA, UVB and UVC wavelengths was best explained by DSB, oxidative damage to lipids, and intracellular ROS levels, respectively.
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Affiliation(s)
- Ana L Santos
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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Santos AL, Baptista I, Lopes S, Henriques I, Gomes NC, Almeida A, Correia A, Cunha Â. The UV responses of bacterioneuston and bacterioplankton isolates depend on the physiological condition and involve a metabolic shift. FEMS Microbiol Ecol 2012; 80:646-58. [DOI: 10.1111/j.1574-6941.2012.01336.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Revised: 02/08/2012] [Accepted: 02/09/2012] [Indexed: 11/29/2022] Open
Affiliation(s)
- Ana L. Santos
- Department of Biology & CESAM; University of Aveiro; Aveiro; Portugal
| | - Inês Baptista
- Department of Biology & CESAM; University of Aveiro; Aveiro; Portugal
| | - Sílvia Lopes
- Department of Biology & CESAM; University of Aveiro; Aveiro; Portugal
| | - Isabel Henriques
- Department of Biology & CESAM; University of Aveiro; Aveiro; Portugal
| | - Newton C.M. Gomes
- Department of Biology & CESAM; University of Aveiro; Aveiro; Portugal
| | - Adelaide Almeida
- Department of Biology & CESAM; University of Aveiro; Aveiro; Portugal
| | - António Correia
- Department of Biology & CESAM; University of Aveiro; Aveiro; Portugal
| | - Ângela Cunha
- Department of Biology & CESAM; University of Aveiro; Aveiro; Portugal
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Cruz A, Oliveira V, Baptista I, Almeida A, Cunha A, Suzuki S, Mendo S. Effect of tributyltin (TBT) in the metabolic activity of TBT-resistant and sensitive estuarine bacteria. Environ Toxicol 2012; 27:11-17. [PMID: 20549634 DOI: 10.1002/tox.20605] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2009] [Revised: 03/03/2010] [Accepted: 03/13/2010] [Indexed: 05/29/2023]
Abstract
The effect of tributyltin (TBT) on growth and metabolic activity of three estuarine bacteria with different TBT resistance profiles was investigated in an organic-rich culture medium (TSB) and in phosphate buffered saline (PBS) buffer. Exposure to TBT was assessed by determining its effect on growth (OD(600 nm) measurement), bacterial productivity (leucine incorporation), viability (CFU counts), aggregation and cell size (from Live/Dead analysis), ATP and NADH concentrations. TBT exposure resulted in decrease of bacterial density, cell size, and metabolic activity. In addition, cell aggregates were observed in the TBT-treated cultures. TBT strongly affected bacterial cell metabolism and seemed to exert an effect on its equilibrium, interfering with cell activity. Also, TBT toxicity was lower when cells were grown in TSB than in PBS, suggesting that a nutrient-rich growth medium can protect cells from TBT toxicity. This study contributes to our understanding of the TBT-resistant cell behavior reflected in its physiology and metabolic activity. This information is of utmost importance for further studies of TBT bioremediation.
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Affiliation(s)
- Andreia Cruz
- CESAM and Biology Department, Aveiro University, Campus Universitário de Santiago, Aveiro, Portugal
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Santos A, Lopes S, Baptista I, Henriques I, Gomes N, Almeida A, Correia A, Cunha Â. Diversity in UV sensitivity and recovery potential among bacterioneuston and bacterioplankton isolates. Lett Appl Microbiol 2011; 52:360-6. [DOI: 10.1111/j.1472-765x.2011.03011.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [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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15
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Monteiro TC, Esperança P, Baptista I, Medeiros L, Candido J. [Transverse myelitis]. ACTA MEDICA PORT 1995; 8:691-4. [PMID: 8669319] [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: 02/01/2023]
Abstract
The authors report three clinical cases of acute transverse myelitis in young patients with emphasis given to the seriousness of this kind of pathology, the need to exclude a potentially treatable cause and the controversial corticosteroid treatment.
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Affiliation(s)
- T C Monteiro
- Serviço de Medicina, Hospital de S. José, Lisboa
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16
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Sousa CA, Baptista I, Aguiar P, Gonçalves A, Cocco C, de Carvalho R. [Systemic lupus erythematosus in the elderly]. ACTA MEDICA PORT 1995; 8:165-7. [PMID: 7484245] [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: 01/25/2023]
Abstract
The authors report two clinical cases of systemic lupus erythematosus, both in patients over 65 years of age. The discussion includes a brief overview of recent publications on this condition in geriatric patients. Some aspects of systemic lupus in elderly persons are suggested and commented on.
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Affiliation(s)
- C A Sousa
- Serviço de Medicina, Hospital de S. José, Lisboa
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17
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Almeida J, Bau J, Baptista I, Matias T, Quininha J, Bentes-Jesus JM, Vital-Morgado A. [Adenocarcinoma of the colon disclosed by endocarditis caused by Streptococcus bovis]. ACTA MEDICA PORT 1992; 5:335-7. [PMID: 1414475] [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: 12/26/2022]
Abstract
The association of Streptococcus bovis endocarditis with colonic neoplasms has been well documented. We describe a patient in whom the finding of a Str. bovis endocarditis stimulated investigation which resulted in the diagnosis and surgical treatment of an adenocarcinoma of the colon.
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Affiliation(s)
- J Almeida
- Serviço de Medicina, Hospital de São José, Lisboa
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