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We report the spatiotemporal increase in abundance of Anchoviella spp. (Engraulidae) through the diet of fish consumers after reservoir formation in the upper Tocantins River, Central Brazil. The increase in the abundance of this planktivorous fish evidences the growing importance of autochthonous herbivory food chains as the reservoir stabilized in this novel lentic ecosystem. These changes would otherwise remain unnoticed only through fish sampling, highlighting the importance of assessing trophic interactions to understand responses to damming at the community and ecosystem levels.
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BACKGROUND: Healthy literacy is a determinant key children/teenager's health and health outcomes. The aim of this study to identify the parents' assessment about Health Education practice to children and teenagers. METHODS: We opted for a descriptive, quantitative and cross-sectional research, with a non-probabilistic convenience sample. The inclusion criteria were: being a parent who uses attending children health appointments in primary health care; being a parent who has a child hospitalized and is accompanying him/her in the pediatric hospital inpatient ward. A questionnaire survey was built with three sections: sample characterization, Health Education practices performed by nurses (5 questions) and a scale that measured Health Education Assessment Scale (HEAS), which contained 48 items and was validated. It was applied from September to December 2018. RESULTS: The survey was filled in by 113 parents. The results showed that 100% (n = 113) of the parents feel comfortable to talk with nurses about children/teenagers health; 79.6% (n = 90) consider that nurses have time availability for the doubts clarification; 61.9% (n = 70) point out that nurses identify child/teenager needs; Healthy eating" (60.2%; n = 68), the "National Vaccination Plan" (53.1%; n = 60) and "Harmful behaviors prevention" (46.9%; n = 53) are the most important topics; 56.6% (n = 64) of the parents, when in doubt, turn first to the pediatrician, and 66.4% (n = 75) considered that this practice was equal important, compared with other nursing interventions. DISCUSSION: This study shows that Health Education provided by nurses is based on the need's identification, with a perspective of involvement and participation, promoting health and conscious changes which reinforces the nurses' position as health educators.
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Lung cancer diagnosis is a challenge since it is also one of the most frequently diagnosed cancers. Diagnostic challenges are deeply related to the development of personalized therapy and molecular and precise histological characterizations of lung cancer. When addressing these features, it is very important to acknowledge the issue of tumour heterogeneity, as it imposes several questions. First of all, lung cancer is a very heterogeneous disease, at a cellular and histological level. Cellular and histological heterogeneity are addressed with emphasis on the diagnosis, pre-neoplastic lesions, and cell origin, trying to contribute to a better knowledge of carcinogenesis. Molecular intra-tumour and inter-tumour heterogeneity are also addressed as temporal heterogeneity. Lung cancer heterogeneity has implications in pathogenesis understanding, diagnosis, selection of tissue for molecular diagnosis, as well as therapeutic decision. The understanding of tumour heterogeneity is crucial and we must be aware of the implications and future developments regarding this field.
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Biomarcadores Tumorais/genética , Heterogeneidade Genética , Neoplasias Pulmonares/genética , Humanos , Neoplasias Pulmonares/classificação , Neoplasias Pulmonares/diagnóstico , Neoplasias Pulmonares/patologia , MutaçãoRESUMO
Considerable advances in tissue engineering and regeneration have been accomplished over the last decade. Bioceramics have been developed to repair, reconstruct, and substitute diseased parts of the body and to promote tissue healing as an alternative to metallic implants. Applications embrace hip, knee, and ligament repair and replacement, maxillofacial reconstruction and augmentation, spinal fusion, bone filler, and repair of periodontal diseases. Bioceramics are well-known for their superior wear resistance, high stiffness, resistance to oxidation, and low coefficient of friction. These specially designed biomaterials are grouped in natural bioceramics (e.g., coral-derived apatites), and synthetic bioceramics, namely bioinert ceramics (e.g., alumina and zirconia), bioactive glasses and glass ceramics, and bioresorbable calcium phosphates-based materials. Physicochemical, mechanical, and biological properties, as well as bioceramics applications in diverse fields of tissue engineering are presented herein. Ongoing clinical trials using bioceramics in osteochondral tissue are also considered. Based on the stringent requirements for clinical applications, prospects for the development of advanced functional bioceramics for tissue engineering are highlighted for the future.
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Regeneração Óssea , Osso e Ossos , Cartilagem , Cerâmica/química , Engenharia Tecidual/métodos , Animais , Osso e Ossos/lesões , Osso e Ossos/metabolismo , Osso e Ossos/patologia , Cartilagem/lesões , Cartilagem/metabolismo , Cartilagem/patologia , Humanos , Medicina Regenerativa/métodosRESUMO
BACKGROUND: Heart valve surgery outcomes are unknown in middle-income countries and thus cannot be used in health system decision making processes. This study estimated in-hospital mortality and medium and long-term survival. METHODS: This was a retrospective study of 78,806 patients who underwent heart valve surgery between 2001 and 2007 in Brazil. Two national databases were used, the Hospital Information System and the Mortality Information System. Kaplan-Meier survival analysis and log-rank tests were performed. Maximum and median follow-up was 7.7 and 2.8 years, respectively (0.002-7.707). RESULTS: Valve replacement accounted for 69.1% of procedures performed. Mitral stenosis, the most common valve injury, represented 38.9% of the total. In 94.7% of mitral stenosis patients, aetiology was rheumatic heart disease. In-hospital mortality was 7.6% and was higher for women, for patients who had undergone concomitant coronary artery bypass grafting (CABG) and for the elderly. Overall survival was 69.9% at the end of follow-up. Survival was worst among elderly, male and concomitant CABG patients (P<0.001). CONCLUSIONS: Rheumatic heart disease is still a major public health problem in Brazil. In-hospital mortality and global survival rates of patients who have undergone heart valve surgery were less satisfactory than those reported in high-income countries. The findings of this study can contribute to guiding decision making processes in middle-income countries similar to Brazil and others concerned with improving the quality of care.
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Procedimentos Cirúrgicos Cardíacos , Doenças das Valvas Cardíacas/cirurgia , Valvas Cardíacas/cirurgia , Cardiopatia Reumática/cirurgia , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Brasil/epidemiologia , Procedimentos Cirúrgicos Cardíacos/efeitos adversos , Procedimentos Cirúrgicos Cardíacos/mortalidade , Comorbidade , Ponte de Artéria Coronária/efeitos adversos , Ponte de Artéria Coronária/mortalidade , Doença da Artéria Coronariana/mortalidade , Doença da Artéria Coronariana/cirurgia , Feminino , Pesquisas sobre Atenção à Saúde , Doenças das Valvas Cardíacas/diagnóstico , Doenças das Valvas Cardíacas/mortalidade , Mortalidade Hospitalar , Humanos , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Modelos de Riscos Proporcionais , Estudos Retrospectivos , Cardiopatia Reumática/diagnóstico , Cardiopatia Reumática/mortalidade , Fatores de Risco , Fatores Sexuais , Fatores de Tempo , Resultado do Tratamento , Adulto JovemRESUMO
BACKGROUND: ageing and sedentary behaviour cause negative changes in the neuromuscular systems of healthy older adults resulting in a decrease in physical functioning. Exercising in water (aquatic exercise, AE) has been shown to be effective at improving physical functioning in this population; however, no systematic review with meta-analysis has been published. PURPOSE: to investigate the effect of AE on physical functioning in healthy older adults compared to control or land-based exercise (LE) through a systematic review with meta-analysis of randomised controlled trials. DATA SOURCES: Medline, Embase, Cinahl, PEDro, SPORTDiscus, Web of Science, Cochrane Library, published before 31st December 2015. STUDY SELECTION: in total, 28 studies met the inclusion criteria and were included in the systematic review; 24 studies with 1,456 subjects (89% female) and with mean age 66.4 years were included in the meta-analysis. DATA EXTRACTION: data were extracted and checked for accuracy by three independent reviewers. DATA SYNTHESIS: size of treatment effect was measured using the standardised mean difference with 95% confidence intervals (CIs). RESULTS: compared to control interventions, AE had a moderate positive effect on physical functioning 0.70 [95% CI 0.48 to 0.92]. Compared to LE, AE had a small positive effect on physical functioning 0.39 [0.12 to 0.66]. LIMITATIONS: there is a high risk of bias and low methodological quality in the studies particularly when comparing AE to LE with possible over estimation of the benefit of AE. CONCLUSIONS: AE may improve physical functioning in healthy older people and is at least as effective as LE.
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Exercício Físico , Aptidão Física , Idoso , Exercício Físico/fisiologia , Humanos , ÁguaRESUMO
BACKGROUND: The efficacy of implantable cardioverter-defibrillator (ICD) and cardiac resynchronization therapy-defibrillator (CRT-D) therapy has already been established in clinical trials but their effectiveness in several clinical settings remains undetermined. This study aimed to assess the effectiveness of ICD and CRT-D therapies within the Brazilian National Health System (SUS). METHODS: All patients who underwent ICD or CRT-D implantation within the SUS from 2001 to 2007 were included in the study. We compared estimated Kaplan-Meier survival curves using the Peto's test. Prognostic factors were selected using Cox's models. RESULTS: There were included 3,295 patients in the ICD group and 681 patients in the CRT-D group. Cardiac causes accounted for 79% of all deaths in both groups and Chagas' heart disease accounted for 31% of these deaths. In the CRT-D group, survival significantly decreased around the fourth year of follow-up, with a decrease from 59.5% to 38.3% in 5.5 months. Transvenous implantation technique was used in 62% of CRT-D patients. In-hospital case-fatality rates were higher in those undergoing surgical implantation (5.3%) than those undergoing transvenous implantation (1.6%) (p = 0.02). CONCLUSIONS: The results show that short-term, medium-term and long-term effectiveness of ICD therapy appears to be similar to that evidenced in clinical trials. In the CRT-D group, in-hospital case-fatality and 30-day case-fatality were higher than those reported in other studies. Surgical epicardial implantation technique was performed in this group at a higher frequency than that reported in the literature and was associated with poorer short-term prognosis.
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Terapia de Ressincronização Cardíaca , Cardiomiopatias/terapia , Doenças Cardiovasculares/terapia , Desfibriladores Implantáveis , Adolescente , Adulto , Idoso , Brasil/epidemiologia , Terapia de Ressincronização Cardíaca/métodos , Cardiomiopatias/mortalidade , Doenças Cardiovasculares/mortalidade , Causas de Morte , Cardiomiopatia Chagásica/mortalidade , Cardiomiopatia Chagásica/terapia , Criança , Seguimentos , Mortalidade Hospitalar , Humanos , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Modelos de Riscos Proporcionais , Adulto JovemRESUMO
OBJECTIVES: The Carpentier-Edwards pericardial (CEP) prostheses are the type of bioprostheses most used worldwide. Although they were designed to minimize the rate of valve deterioration and reoperation, their clinical superiority over other prostheses models still lacks confirmation. The objective of this study was to evaluate its effectiveness. METHODS: We performed a systematic review and meta-analysis in the PubMed, Embase, Cochrane, and Lilacs databases. Operative mortality, overall mortality and reoperation rates after heart valve surgery were compared between the use of CEP and other cardiac prostheses. Two independent reviewers screened studies for inclusion and extracted the data. Disagreements were resolved by consensus. The GRADE criterion was used to assess the evidence quality. RESULTS: A total of twenty-eight studies were selected, including 19,615 individuals. The studies presented a high heterogeneity and low quality of evidence what limited the reliability of the results. The pooled data from the selected studies did not demonstrate significant differences between CEP and porcine, pericardial or stentless prostheses regarding operative mortality, overall mortality and reoperation rates. However, the pooled data from 3 observational trials pointed out a higher risk for reoperation after valve replacement using CEP prostheses against mechanical prostheses (OR 4.92 [95 percent confidence interval 2.43-9.96]). CONCLUSIONS: The current data present in the literature still does not support a clinical advantage for the use of CEP prostheses over other bioprostheses. The quality of the studies in the literature is limited and further studies are needed to address if CEP prostheses will have a clinical advantage over other prostheses.
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Bioprótese , Implante de Prótese de Valva Cardíaca/métodos , Animais , Próteses Valvulares Cardíacas , Implante de Prótese de Valva Cardíaca/efeitos adversos , Implante de Prótese de Valva Cardíaca/mortalidade , Humanos , Complicações Pós-Operatórias/epidemiologia , Reoperação/estatística & dados numéricos , Reprodutibilidade dos Testes , SuínosRESUMO
The study of interactions between copepods of the genus Acartia and toxic dinoflagellates of the genus Alexandrium has been an important topic during the last four decades. Feeding behavior and physiological responses of copepods have been studied in laboratory and field experiments, sometimes with contradictory results. More recently, an evolutionary adaptive mechanism leading to enhanced tolerance of Alexandrium toxins in a population of Acartia experiencing chronic exposure to these dinoflagellates has been reported. In the present work, we collected data from the existing studies on the effects of Alexandrium on feeding, reproduction and mortality of Acartia. With these data, we performed a systematic review consisting of a secondary analysis employing general or generalized linear models, weighting data from different studies by the reciprocal of their standard deviation. Our first aim was to overcome shortcomings of individual studies: limited ranges of the variables and overlooked variables (experiment length, population adaptation). These shortcomings could have led to inconsistent conclusions by missing heterogeneous patterns in copepod responses and in the interactions between variables. Our second aim was to test the enhanced physiological performance of chronically exposed relative to naïve copepod populations over a wide geographic range. We found that the feeding rate is enhanced by increased food biomass, irrespective of the food type. Toxins do not have a clear effect on egg production and have a bi-phasic effect on egg hatching success, which was negative above a specific threshold. Toxins also increased mortality. Experiment length had a positive effect on egg production and negative on egg hatching. Naïve copepod populations showed consistently lower ingestion of Alexandrium and egg hatching rates, thereby supporting the spread of the aforementioned mechanism across populations over a wide geographic range.
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Copépodes , Dinoflagellida , Comportamento Alimentar , Reprodução , Animais , Dinoflagellida/fisiologia , Copépodes/fisiologia , Modelos LinearesRESUMO
There is a growing demand for engineered bone tissues custom-designed to match the patient-specific defect size and in vitro models for studying bone diseases and/or drug screening. Herein, we propose a bioprinted bone tissue construct using SaOs-2 cells within alginate/gellan gum/hydroxyapatite inks. Different ink formulations were developed with varying hydroxyapatite content and then evaluated for viscoelasticity, printability, biomineralization properties, post-printing viability, proliferation, metabolic activity, and osteogenic phenotype of SaOs-2-encapsulated cells. Results indicate that ink formulations exhibit non-Newtonian shear-thinning behaviour, maintaining shape integrity and structural stability post-printing. Ink mineralization rates increase with the hydroxyapatite content, rendering them suitable for bone defect strategies. Post-printed cells in the developed constructs remain live, spreading, and metabolically active but do not proliferate. Osteogenic gene and protein expression, both early and late, show upregulation at day 7 relative to day 1, followed by downregulation at day 14. Lower hydroxyapatite content inks demonstrate up to fourfold upregulation in genes and proteins at most time points. Additionally, these constructs release calcium and phosphate at levels conducive to mineralization. Overall, the tissue-engineered miniaturized constructs not only meet the criteria for early-stage bone defect/fracture regeneration but also serve as a promising platform for drug screening and evaluating potential therapeutic treatments.
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Alginatos , Bioimpressão , Regeneração Óssea , Durapatita , Tinta , Osteogênese , Polissacarídeos Bacterianos , Engenharia Tecidual , Alicerces Teciduais , Durapatita/química , Durapatita/farmacologia , Alginatos/química , Alginatos/farmacologia , Bioimpressão/métodos , Humanos , Osteogênese/efeitos dos fármacos , Polissacarídeos Bacterianos/química , Polissacarídeos Bacterianos/farmacologia , Regeneração Óssea/efeitos dos fármacos , Alicerces Teciduais/química , Engenharia Tecidual/métodos , Osso e Ossos/efeitos dos fármacos , Osso e Ossos/metabolismo , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacosRESUMO
Screen printing is one of the most used techniques for developing printed electronics. It stands out for its simplicity, scalability, and effectivity. Specifically, the manufacturing of hybrid integrated circuits has promoted the development of the technique, and the photovoltaic industry has enhanced the printing process by developing high-performance metallization pastes and high-end screens. In recent years, fine lines of 50 µm or smaller are about to be adopted in mass production, and screen printing has to compete with digital printing techniques such as inkjet printing, which can reach narrower lines. In this sense, this work is focused on testing the printing resolution of a high-performance stainless-steel screen with commercial conductive inks and functional lab-made inks based on reduced graphene oxide using an interdigitated structure. We achieved electrically conductive functional patterns with a minimum printing resolution of 40 µm for all inks.
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Our study provides valuable insights into the relationship between artificial intelligence (AI) and Human Resource Management (HRM). We have minimised bias and ensured reliable findings by employing a systematic literature review and the PRISMA statement. Our comprehensive synthesis of the studies included in this research, along with a bibliometric analysis of articles, journals, indexes, authors' affiliations, citations, keyword co-occurrences, and co-authorship analysis, has produced robust results. The discussion of our findings focuses on critical areas of interest, such as AI and Talent, AI Bias, Ethics and Law, and their impact on Human Resource (HR) management. Our research highlights the recognition by organisations of the importance of talent management in achieving a competitive advantage as higher-level skills become increasingly necessary. Although some HR managers have adopted AI technology for talent acquisition, our study reveals that there is still room for improvement. Our study is in line with previous research that acknowledges the potential for AI to revolutionise HR management and the future of work. Our findings emphasise the need for HR managers to be proactive in embracing technology and bridging the technological, human, societal, and governmental gaps. Our study contributes to the growing body of AI and HR management knowledge, providing essential insights and recommendations for future research. The importance of our study lies in its focus on the role of HR in promoting the benefits of AI-based applications, thereby creating a larger body of knowledge from an organisational perspective.
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Some of the species of the genus Bacopa have been used in Pharmacopoeia worldwide. However, in Mexico, Bacopa monnieri has neither been extensively cultivated nor studied, nor has their use in traditional medicine been reported. The aim of this work was to assess the taxonomic verification of the four wild populations of B. monnieri, the chemical content of their pigments and phenols and to provide an analysis of their potential bioactivity. B. monnieri wild populations from Mexico were validated using molecular markers. Chromatographic profiling using HPLC-PDA revealed 21 compounds comprising 12 chlorophylls and nine carotenoids; of the latter, the major ones were lutein (0.921 ± 0.031 µg/mg of dry extract) and ß-carotene (0.095 ± 0.003 µg/mg of dry extract). The total phenolic content, determined using the Folin-Ciocalteu assay, ranged from 54.8 ± 5.8 to 70.3 ± 2.2 µg of gallic acid equivalents (GAE)/mg. Plant extracts scavenged from the free radical DPPH in IC50 ranged from 130.6 ± 3.0 to 249.9 ± 12.1 µg dry extract/mL. In terms of the anti-inflammatory potential, the most effective extract was from a soil-based plant from Jalisco (BS), reduced from nitric oxide in a RAW 264.7 culture medium, with an IC50 value of 134 µg of dry extract/mL. The BS extract showed a significant neutral lipid-reducing activity in the zebrafish model, ranging from 3.13 µg/mL p < 0.05 to 100 µg/mL p < 0.0001. Overall, the extracts analyzed here for the first time seem promising for future use because of their antioxidant, anti-inflammatory and anti-obesity potential.
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There are cultural and educational barriers that hinder the adoption of technologies in educational practice. This is mainly owed to how the majority of teachers are still digital immigrants lacking adequate preparation to work in an environment of fast-paced innovation and without the corresponding updates of cognitive technology. In order to mitigate this problem, in this paper we present an alternative framework that intends to increase the effectiveness of technological application in broader educational contexts bringing together three constructs causally relating the domains of Cognitive and Motivational Competencies (CMC) - relating to people; Organisational Institutional Complexity (OIC) - educational systems and Behavioural Intentional Use of Technology (BIUT) relating to adoption of attitudes. Measurement indicators were applied to evaluate each construct in order to better predict teaching behaviour in a broader educational context. The framework evaluation was performed by two focus groups composed of experienced, highly specialised education consultants who assessed the pedagogical, technological, teacher's behaviour and overall institutional/organisational environment involving the proposed alternative solutions. The discussions and results show that participants agreed on the proposed framework's usefulness and its contributions to help teachers mediate the gaps between school and the outside world, all the while considering political and administrative barriers. The evaluators also highlight the structured motivational and self-efficacy aspects that must involve teachers and other stakeholders concerned with adopting a new social action profile for the benefit of collectives. The next work to follow this paper will be a dissemination proposal concerning the Brazilian National Educational Plan, a technological adoption that effectively meets Education's institutional principles in this country.
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The scientific community has been doing significant efforts towards engineering new 3D bone models in recent years. Osteocytes are mechanosensitive cells that play significant roles in the maintenance of bone homeostasis. Currently, as far as we know, there are no 3D models that faithfully recapitulate a bone microenvironment capable of promoting the differentiation of osteoblasts towards osteocytes. Besides, in the existing models, the use of human cells does not prevail over the animal cell lines. For so, we propose a 3D model that may have important implications for ongoing efforts towards a better understanding of bone physiology and disease. The main aim of the current work was the promotion of an effective differentiation of osteoblasts into osteocytes by mean of using a 3D model composed of primary human osteoblasts (hOBs) cultured on Gellan Gum-Hydroxyapatite (GG-HAp) matrix under a long-term osteogenic culture. The results revealed that GG-HAp matrix stimulated a fast cell migration/entrapment, attachment, spreading, and mineralization. Moreover, the transition process from osteoblasts to osteocytes was confirmed by the expression of the osteogenic-related (ALP, Runx2, COL I, OC, OPN and OSX) and osteocyte-related (hPDPN) marker throughout the culture time. Overall, the developed 3D model holds a great promise for the treatment of various bone diseases, namely on diagnostic applications and for bone regeneration purposes.
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Durapatita , Osteogênese , Animais , Diferenciação Celular , Humanos , Hidrogéis/farmacologia , Osteoblastos , Polissacarídeos BacterianosRESUMO
Cancer is a multifaceted pathology, where cellular and acellular players interact to drive cancer progression and, in the worst-case, metastasis. The current methods to investigate the heterogeneous nature of cancer are inadequate, since they rely on 2D cell cultures and animal models. The cell line-based drug efficacy and toxicity assays are not able to predict the tumor response to anti-cancer agents and it is already widely discussed how molecular pathway are not recapitulated in vitro so called flat biology. On the other side, animal models often fail to detect the side-effects of drugs, mimic the metastatic progression or the interaction between cancer and immune system, due to biologic difference in human and animals. Moreover, ethical and regulatory issues limit animal experimentation. Every year pharma/biotech companies lose resources in drug discovery and testing processes that are successful only in 5% of the cases. There is an urgent need to validate accurate and predictive platforms in order to enhance drug-testing process taking into account the physiopathology of the tumor microenvironment. Three dimensional in vitro tumor models could enhance drug manufactures in developing effective drugs for cancer diseases. The 3D in vitro cancer models can improve the predictability of toxicity and drug sensitivity in cancer. Despite the demonstrated advantages of 3D in vitro disease systems when compared to 2D culture and animal models, they still do not reach the standardization required for preclinical trials. This review highlights in vitro models that may be used as preclinical models, accelerating the drug development process towards more precise and personalized standard of care for cancer patients. We describe the state-of-the art of 3D in vitro culture systems, with a focus on how these different approaches could be coupled in order to achieve a compromise between standardization and reliability in recapitulating tumor microenvironment and drug response.
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Detecção Precoce de Câncer , Neoplasias , Animais , Avaliação Pré-Clínica de Medicamentos , Humanos , Neoplasias/tratamento farmacológico , Reprodutibilidade dos Testes , Microambiente TumoralRESUMO
Cyanobacteria are prokaryotic photosynthetic living organisms that inhabit our planet for over three billion years. With a worldwide distribution, they can be found in all types of environments: fresh, brackish and saltwater as well as terrestrial. Though beneficial in the development of life on earth, they also constitute a serious risk to our ecosystems since they can biologically produce harmful secondary metabolites named cyanotoxins. When studying cyanobacteria and their cyanotoxins, several methodologies have been applied with an increasing relevance to molecular methods. Therefore, the aim of this review is to describe alternative molecular methods that can be used as alternative methods for the identification of cyanobacteria. More traditional chemotaxonomic methods are discussed briefly as are the standard and somewhat dated techniques for assessing genome content for taxonomic classification schemes. The use of DNA amplification technology has been applied to the systematics and phylogeny of many bacterial groups, and the optimisation of methods for rapid identification and classification of cyanobacteria are presented. Together with novel methods developed for these photosynthetic microorganisms, the generated DNA profiles have been utilised to study cyanobacterial bloom population diversity and prediction of strain toxigenicity. Finally, the genotypes found were applied to a variety of phylogenetic analyses; trees were reconstructed and compared to the current morphological system of classification. The ecology and diversity of the cyanobacteria is discussed with respect to the derived molecular phylogenies and systematics.
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Toxinas Bacterianas/genética , Cianobactérias/genética , Cianobactérias/patogenicidade , Impressões Digitais de DNA/métodos , DNA Bacteriano/genética , Proteínas de Bactérias/genética , Proteínas de Bactérias/fisiologia , Cianobactérias/classificação , Cianobactérias/fisiologia , Citoplasma/fisiologia , Ecossistema , Genoma Bacteriano , Repetições de Microssatélites/genética , Fotossíntese , Reação em Cadeia da Polimerase/métodos , Polimorfismo Genético , Polimorfismo de Fragmento de Restrição , RNA Bacteriano/genética , RNA Ribossômico/genética , Especificidade da EspécieRESUMO
This cross-sectional study was conducted among 753 students (10th and 12th graders) from the Douro Region (Northern Portugal) to identify the information that adolescents have about emergency contraception (postcoital contraception), as well as their attitudes. Data collection was performed using a three-part questionnaire, divided as follows: the 1st part consists of 10 questions regarding sociodemographic characteristics; the 2nd part consists of 22 questions about knowledge of sexuality/emergency contraception; and the 3rd part has eight questions about the adolescent's attitude regarding emergency contraception. Results indicate there is limited knowledge (10.5%). The youths' attitude is generally in favor of emergency contraception. Girls in the 12th grade are the students with the broadest effective knowledge.
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Anticoncepção Pós-Coito , Conhecimentos, Atitudes e Prática em Saúde , Adolescente , Estudos Transversais , Feminino , Humanos , Masculino , Adulto JovemRESUMO
BACKGROUND: In multivessel disease patients with moderate stenosis, fractional flow reserve (FFR) allows the analysis of the lesions and guides treatment, and could contribute to the cost-effectiveness (CE) of non-pharmacological stents (NPS). OBJECTIVES: To evaluate CE and clinical impact of FFR-guided versus angiography-guided angioplasty (ANGIO) in multivessel patients using NPS. METHODS: Multivessel disease patients were prospectively randomized to FFR or ANGIO groups during a 5 year-period and followed for < 12 months. Outcomes measures were major adverse cardiac events (MACE), restenosis and CE. RESULTS: We studied 69 patients, 47 (68.1%) men, aged 62.0 ± 9.0 years, 34 (49.2%) in FFR group and 53 (50.7%) in ANGIO group, with stable angina or acute coronary syndrome. In FFR, there were 26 patients with biarterial disease (76.5%) and 8 (23.5%) with triarterial disease, and in ANGIO, 24 (68.6%) with biarterial and 11 (31.4%) with triarterial disease. Twelve MACEs were observed - 3 deaths: 2 (5.8%) in FFR and 1 (2.8%) in ANGIO, 9 (13.0%) angina: 4(11.7%) in FFR and 5(14.2%) in ANGIO, 6 restenosis: 2(5.8%) in FFR and 4 (11.4%) in ANGIO. Angiography detected 87(53.0%) lesions in FFR, 39(23.7%) with PCI and 48(29.3%) with medical treatment; and 77 (47.0%) lesions in ANGIO, all treated with angioplasty. Thirty-nine (33.3%) stents were registered in FFR (0.45 ± 0.50 stents/lesion) and 78 (1.05 ± 0.22 stents/lesion) in ANGIO (p = 0.0001), 51.4% greater in ANGIO than FFR. CE analysis revealed a cost of BRL 5,045.97 BRL 5,430.60 in ANGIO and FFR, respectively. The difference of effectiveness was of 1.82%. CONCLUSION: FFR reduced the number of lesions treated and stents, and the need for target-lesion revascularization, with a CE comparable with that of angiography.