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1.
Res Vet Sci ; 180: 105417, 2024 Sep 14.
Artigo em Inglês | MEDLINE | ID: mdl-39288683

RESUMO

The bacterium Mycoplasma hyopneumoniae (Mhp) causes a chronic infectious respiratory disease in pigs, leading to important economic losses. This study aimed to compare the immune response of the local Piau breed and a commercial line to Mhp vaccination. For this, two phases were carried out. In the first, gene expression of toll-like receptors (TLR2, TLR4, TLR6, and TLR10) and cytokines (IL2, IL6, IL8, IL10, IL12, IL13, TNFα, and TGFß) was assessed in porcine blood mononuclear cells (PBMC) from the two genetic groups before and after vaccination. In the second experiment, nitric oxide production, specific antibodies, and gene expression of toll-like receptors and cytokines were evaluated in bronchoalveolar lavage fluid (BALF) cells of vaccinated and unvaccinated pigs. After vaccination against Mhp, TLR2, TLR4, TLR6, TLR10, IL6, TNFα, and TGFß expression levels were elevated in PBMC from commercial animals, and TLR6, TLR10, and TGFß expression levels were elevated in PBMC from the Piau group. Vaccination also increased the production of Mhp-specific IgG antibodies in BALF cells in the Piau breed. Comparison of the two genetic groups revealed differences in TNFα and IL10 expression in BALF cells. These results show that Piau pigs have different immune responses to vaccination compared with commercial animals. It is worth noting that these genetic differences between both genetic groups may be related to phenotypic differences in Mhp resistance or susceptibility.

2.
Cureus ; 16(8): e66586, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-39252750

RESUMO

Cavernous hemangiomas (or cavernomas) are benign vasculature malformations that occasionally occur in the central nervous system (CNS). The vast majority is found supratentorial, but cavernomas also appear on the spine, usually intramedullary. Cavernomas in the cauda equina are extremely rare, with only a few cases reported in the literature. We report a case of a cavernoma of the cauda equina in a 69-year-old woman with low back pain and right sciatica for two years. Lumbar MRI showed an intradural mass lesion at the L1-L2 level. She underwent surgery with resection of the lesion, which confirmed the diagnosis of cavernous hemangioma. A good clinical outcome was achieved. In addition to the case report, we present a literature review on all reported cauda equina cavernomas, discussing their clinical presentations, imaging characteristics, histological findings, and surgical management.

3.
Healthcare (Basel) ; 12(16)2024 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-39201184

RESUMO

Despite their familiarity with technology, higher education students often lack the critical skills needed to assess the credibility of online health information, potentially impacting their health decisions and well-being. This study aims to validate and assess the e-Health Literacy Scale among those in Portuguese higher education. In addition, this study focused on measuring their e-health literacy levels and investigating how these skills relate to different sociodemographic variables. This cross-sectional study was conducted in two phases. Initially, the test-retest reliability and reproducibility of measured e-health literacy were assessed with a convenience sample of 20 participants. Subsequently, the e-health scale was applied to a group of 245 Portuguese higher education students. The research took place from January 2023 to April 2024. The scale exhibited robust internal consistency and reproducibility. Male gender consistently correlates with higher levels of e-health literacy. Students demonstrate good levels of e-health literacy (24/40), reflecting their ability to effectively navigate and utilize health information online. By integrating strategies to further enhance this literacy into university health programs, students can develop essential skills necessary for making informed decisions about their health. This proactive approach not only empowers students to access reliable health resources but also fosters a culture of health literacy that can positively impact their well-being both during their academic journey and beyond graduation.

4.
Gerodontology ; 41(3): 436-440, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39190677

RESUMO

OBJECTIVES: To document the case of a patient who underwent several endodontic treatments due to a glandular odontogenic cyst misdiagnosed as an inflammatory periapical lesion. BACKGROUND: Glandular odontogenic cysts behave more aggressively, while others have an indolent course. There is limited information on this cyst in the gerodontologic literature. MATERIALS AND METHODS: A 76-year-old male patient presented with an asymptomatic expansive lesion in the anterior mandible resistant to several endodontic treatments. Cone-beam computed tomography revealed a multilocular osteolytic lesion measuring 6.0 × 4.0 cm, with cortical bone perforation. RESULTS: Histopathological analysis of a biopsy specimen was consistent with glandular odontogenic cyst. The patient underwent marginal mandibulectomy with preservation of the base of the mandible. CONCLUSION: A strict diagnostic process is important to avoid unwanted consequences, particularly in the geriatric population.


Assuntos
Tomografia Computadorizada de Feixe Cônico , Erros de Diagnóstico , Cistos Odontogênicos , Humanos , Idoso , Masculino , Cistos Odontogênicos/diagnóstico , Cistos Odontogênicos/patologia , Cistos Odontogênicos/cirurgia , Doenças Mandibulares/diagnóstico , Doenças Mandibulares/cirurgia , Doenças Mandibulares/diagnóstico por imagem , Doenças Mandibulares/patologia , Doenças Periapicais/diagnóstico , Doenças Periapicais/diagnóstico por imagem , Doenças Periapicais/patologia
5.
Environ Toxicol Pharmacol ; 110: 104516, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39032582

RESUMO

Partamona helleri is an important pollinator in the Neotropics. However, this bee faces an increased risk of pesticide exposure, potentially affecting both individual bees and entire colonies. Thus, this study aimed to evaluate the effects of the herbicide tebuthiuron on behavior, antioxidant activity, midgut morphology, and signaling pathways related to cell death, cell proliferation and differentiation in P. helleri workers. tebuthiuron significantly reduced locomotor activity and induced morphological changes in the midgut. The activity of the detoxification enzymes superoxide dismutase and glutathione S-transferase increased after exposure, indicating a detoxification mechanism. Furthermore, the herbicide led to alterations in the number of positive cells for signaling-pathway proteins in the midgut of bees, suggesting induction of apoptotic cell death and disruption of midgut epithelial regeneration. Therefore, tebuthiuron may negatively impact the behavior, antioxidant activity, morphology, and physiology of P. helleri workers, potentially posing a threat to the survival of this non-target organism.


Assuntos
Comportamento Animal , Glutationa Transferase , Herbicidas , Superóxido Dismutase , Animais , Abelhas/efeitos dos fármacos , Abelhas/fisiologia , Herbicidas/toxicidade , Glutationa Transferase/metabolismo , Comportamento Animal/efeitos dos fármacos , Superóxido Dismutase/metabolismo , Compostos de Fenilureia/toxicidade , Compostos de Fenilureia/farmacologia
6.
Front Oncol ; 14: 1372947, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38952553

RESUMO

Background: Breast cancer is the leading cause of cancer death among women worldwide. Studies about the genomic landscape of metastatic breast cancer (MBC) have predominantly originated from developed nations. There are still limited data on the molecular epidemiology of MBC in low- and middle-income countries. This study aims to evaluate the prevalence of mutations in the PI3K-AKT pathway and other actionable drivers in estrogen receptor (ER)+/HER2- MBC among Brazilian patients treated at a large institution representative of the nation's demographic diversity. Methods: We conducted a retrospective observational study using laboratory data (OC Precision Medicine). Our study included tumor samples from patients with ER+/HER2- MBC who underwent routine tumor testing from 2020 to 2023 and originated from several Brazilian centers within the Oncoclinicas network. Two distinct next-generation sequencing (NGS) assays were used: GS Focus (23 genes, covering PIK3CA, AKT1, ESR1, ERBB2, BRCA1, BRCA2, PALB2, TP53, but not PTEN) or GS 180 (180 genes, including PTEN, tumor mutation burden [TMB] and microsatellite instability [MSI]). Results: Evaluation of tumor samples from 328 patients was undertaken, mostly (75.6%) with GS Focus. Of these, 69% were primary tumors, while 31% were metastatic lesions. The prevalence of mutations in the PI3K-AKT pathway was 39.3% (95% confidence interval, 33% to 43%), distributed as 37.5% in PIK3CA and 1.8% in AKT1. Stratification by age revealed a higher incidence of mutations in this pathway among patients over 50 (44.5% vs 29.1%, p=0.01). Among the PIK3CA mutations, 78% were canonical (included in the alpelisib companion diagnostic non-NGS test), while the remaining 22% were characterized as non-canonical mutations (identifiable only by NGS test). ESR1 mutations were detected in 6.1%, exhibiting a higher frequency in metastatic samples (15.1% vs 1.3%, p=0.003). Additionally, mutations in BRCA1, BRCA2, or PALB2 were identified in 3.9% of cases, while mutations in ERBB2 were found in 2.1%. No PTEN mutations were detected, nor were TMB high or MSI cases. Conclusion: We describe the genomic landscape of Brazilian patients with ER+/HER2- MBC, in which the somatic mutation profile is comparable to what is described in the literature globally. These data are important for developing precision medicine strategies in this scenario, as well as for health systems management and research initiatives.

7.
Rev Bras Ortop (Sao Paulo) ; 59(Suppl 1): e43-e48, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-39027176

RESUMO

Ischiofemoral impingement (IFI), although infrequent, should be thought of as one of the causes of deep gluteal pain syndrome. Difficulty in establishing a diagnosis and inaccurate clinical examination can be associated with the small number of case reports in the literature. The initial IFI treatment uses conservative measures, and surgical treatment is infrequent. The following is a case report of four adult patients, all female, diagnosed with IFI, with unsuccessful conservative treatments, in whom endoscopic resection of the smaller trochanter was performed with good results.

8.
Polymers (Basel) ; 16(13)2024 Jul 03.
Artigo em Inglês | MEDLINE | ID: mdl-39000760

RESUMO

Most polymeric food packaging materials are non-biodegradable and derived from petroleum, thus recent studies have focused on evaluating alternative biodegradable materials from renewable sources, with polysaccharides and proteins as the main types of employed biopolymers. Therefore, this study aimed to develop biopolymeric films based on sunflower proteins and galactomannans from locust bean gum. The influence of the galactomannan amount (0.10%, 0.30%, 0.50%, and 0.75% w/v) on the physicochemical, thermal, and mechanical properties of cast sunflower protein-based films was studied. Sunflower proteins gave rise to yellowish, shining, and translucid films. With the incorporation of locust bean gum-derived galactomannans, the films became more brown and opaque, although they still maintained some translucency. Galactomannans significantly changed the proteins' secondary structures, giving rise to films with increased tensile resistance and stretchability. Nevertheless, the increase in the galactomannan amount did not have a significant effect on the film's thermal stability. The protein/galactomannan-based films showed values of water vapor and oxygen permeability that were slightly higher than those of the pristine materials. Overall, blending locust bean gum galactomannans with sunflower proteins was revealed to be a promising strategy to develop naturally colored and translucid films with enhanced mechanical resistance while maintaining flexibility, fitting the desired properties for biodegradable food packaging materials.

9.
Nutrients ; 16(11)2024 05 31.
Artigo em Inglês | MEDLINE | ID: mdl-38892655

RESUMO

Commercial environments and food acquisition methods significantly shape dietary practices and impact health. This study assesses dietary choices among Portuguese university students regarding vending machines, canteens, and lunches from home. It also evaluates their use of the university canteen and their tendency to bring lunch from home. This pilot cross-sectional study used a self-administered electronic questionnaire, made available in early 2023. Participants were recruited through snowball sampling. The study included 137 students from Portuguese higher education institutions, mainly women (74.5%), pursuing degrees or integrated Master's degrees (83.2%), primarily in health-related fields (55.5%). The median age was 21 years (20 to 23.5 years). About 70.0% regularly consumed food from vending machines, while approximately 60.0% brought lunch from home, avoiding the canteen. Factors such as convenience (48.5%), price (47.5%), product availability (40.6%), and taste (39.6%) mainly influenced vending machine choices. Monthly, chocolates, water, coffee, cookies, treats, and soft drinks were the most commonly acquired items, with coffee being the most frequent daily purchase. These findings provide insights for creating policies and initiatives to promote healthier and more accessible food options for students and strategies to encourage positive eating behaviors.


Assuntos
Comportamento de Escolha , Distribuidores Automáticos de Alimentos , Preferências Alimentares , Serviços de Alimentação , Almoço , Estudantes , Humanos , Projetos Piloto , Feminino , Universidades , Masculino , Adulto Jovem , Estudos Transversais , Distribuidores Automáticos de Alimentos/estatística & dados numéricos , Estudantes/estatística & dados numéricos , Serviços de Alimentação/estatística & dados numéricos , Portugal , Inquéritos e Questionários , Adulto , Dieta/estatística & dados numéricos , Comportamento Alimentar
10.
Nutr Res ; 127: 40-52, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38861793

RESUMO

The effect of calcium (Ca) on glycation markers is unknown. We hypothesized that increased Ca intake from skimmed milk associated with an energy-restricted diet intake will reduce glycation markers. This reduction will be associated with a greater improvement in markers of metabolic control in adults with type 2 diabetes, overweight, and low habitual Ca intake (<600 mg/d). In this secondary data analysis based on a crossover clinical trial, 14 adults were allocated into 2 groups: high calcium (shake containing 700 mg Ca/day) or low calcium (shake with 6.4 mg Ca/day), for 12 consecutive weeks per session. Energy-restricted diets were also prescribed (-500 kcal/d, 800 mg of dietary Ca/d) to all participants. Advanced glycation end products (AGEs), soluble receptor for AGEs (sRAGE), glycemic control, and lipid profile were assessed at baseline and after 12 weeks. High-calcium serum AGE concentrations and AGE/sRAGE ratio were lower at the end of the study. ΔAGE and ΔAGE/sRAGE ratio were both positively associated with Δtriglycerides, Δtotal cholesterol, Δtriglyceride-glucose index and variations, and Δvisceral adiposity index. ΔAGE/sRAGE was positively associated with Δfructosamine and Δhigh-density lipoprotein-cholesterol, and negatively associated with male sex. Consumption of approximately 1200 mg/day of calcium (3 servings of skim milk) reduced serum AGEs concentrations and the AGE/sRAGE ratio in individuals with diabetes. In general, positive changes in glycation markers are associated with lipid profile, insulin resistance, and adiposity markers worsening. ΔAGEs/ΔsRAGE ratio seems to be a better marker of metabolic status than ΔAGEs and ΔsRAGE alone. Registered in ClinicalTrials.gov (NCT02377076).


Assuntos
Biomarcadores , Cálcio da Dieta , Estudos Cross-Over , Diabetes Mellitus Tipo 2 , Produtos Finais de Glicação Avançada , Leite , Sobrepeso , Receptor para Produtos Finais de Glicação Avançada , Humanos , Masculino , Feminino , Diabetes Mellitus Tipo 2/dietoterapia , Diabetes Mellitus Tipo 2/sangue , Sobrepeso/dietoterapia , Sobrepeso/sangue , Sobrepeso/metabolismo , Produtos Finais de Glicação Avançada/sangue , Pessoa de Meia-Idade , Cálcio da Dieta/administração & dosagem , Biomarcadores/sangue , Receptor para Produtos Finais de Glicação Avançada/sangue , Receptor para Produtos Finais de Glicação Avançada/metabolismo , Animais , Adulto , Glicemia/metabolismo , Restrição Calórica , Idoso , Triglicerídeos/sangue , Receptores Imunológicos/sangue , Receptores Imunológicos/metabolismo , Controle Glicêmico/métodos
11.
Vet Immunol Immunopathol ; 274: 110793, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38943998

RESUMO

Mastitis, an inflammation of the mammary gland affecting milk production and quality in dairy herds, is often associated with Staphylococcus spp. in goats. Neutrophils are crucial in combating infections by migrating into milk and deploying various defense strategies, including the release of neutrophil extracellular traps (NETs) composed of DNA, histones, and bactericidal proteins. This study investigated whether NETs are released by goat neutrophils stimulated in vitro by Staphylococcus aureus and Staphylococcus warneri, two common pathogens of goat mastitis. PMNs were isolated from blood from healthy adult goats. We evaluated goat NET formation by stimulating cells with: phorbol 12-myristate 13-acetate (PMA) as a positive control, cytochalasin for inhibition of actin polymerization, S. aureus, and S. warneri. NET formation was observed in response to chemical stimulation and bacterial presence, effectively trapping pathogens. Variations in NET formation between S. aureus and S. warneri suggest pathogen-specific responses. These findings suggest that the formation of NETs may be an important complementary mechanism in the defense against mastitis in goats. In conclusion, this study unveils a novel defense mechanism in goats, indicating the role of NETs against S. aureus and S. warneri in mastitis.


Assuntos
Armadilhas Extracelulares , Doenças das Cabras , Cabras , Mastite , Neutrófilos , Infecções Estafilocócicas , Staphylococcus aureus , Animais , Cabras/imunologia , Armadilhas Extracelulares/imunologia , Feminino , Mastite/veterinária , Mastite/imunologia , Mastite/microbiologia , Doenças das Cabras/imunologia , Doenças das Cabras/microbiologia , Neutrófilos/imunologia , Staphylococcus aureus/imunologia , Infecções Estafilocócicas/veterinária , Infecções Estafilocócicas/imunologia , Staphylococcus/imunologia
12.
Midwifery ; 135: 104018, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38729000

RESUMO

BACKGROUND: Pregnant and postpartum women infected by COVID-19 are at increased risk of adverse outcomes, including negative effects on their mental health. Brazilian maternal mortality rate due to COVID-19 is 2.5 times higher than overall mortality rates. This study aimed to understand how pregnant/postpartum women experienced the COVID-19 suspicion/investigation or confirmed infection in different Brazilian cities, the pandemic's consequences to women and their families, and their needs to improve maternal health services during public health emergencies. METHODS: We conducted a qualitative study with 27 women with COVID-19 and 6 of their family members, as part of a multicenter study among 15 maternity hospitals in Brazil. We applied in-depth interviews through telephone calls when women received the diagnostic or had a suspect infection and after 60 days. Another semi-structured interview was applied to their close family members. The interviews were considered through thematic analysis. RESULTS: From the thematic content analysis three major themes emerged from the first and second interviews: (Cucinotta and Vanelli, 2020) assistance received by the woman and newborn in the medical services; (World Health Organization (WHO) 2021) stigma/fear of contamination from health workers and from family and friends reported by the women; (Allotey et al., 2020) the COVID-19 pandemic impact. CONCLUSION: Before the availability of the COVID-19 vaccine, pregnant women experienced fear of death, hospitalization, quarantine, loss of family members, and financial repercussions, resulting in physical, psychological, and socioeconomic impacts on these women's lives.


Assuntos
COVID-19 , Gestantes , Pesquisa Qualitativa , Humanos , Feminino , COVID-19/prevenção & controle , COVID-19/psicologia , COVID-19/epidemiologia , Gravidez , Brasil/epidemiologia , Adulto , Gestantes/psicologia , SARS-CoV-2 , Família/psicologia , Complicações Infecciosas na Gravidez/psicologia , Complicações Infecciosas na Gravidez/prevenção & controle , Vacinação/psicologia , Vacinação/estatística & dados numéricos
13.
Alcohol Alcohol ; 59(3)2024 Mar 16.
Artigo em Inglês | MEDLINE | ID: mdl-38695263

RESUMO

AIMS: This study aimed to test whether the alcohol harm paradox (AHP) is observed in Brazil by investigating (i) the association between educational attainment and alcohol-related consequences (ARC) and (ii) the contribution of average alcohol volume consumed (AVC), past-month heavy episodic drinking (HED), smoking, body mass index (BMI), and depression in accounting for the disparities in ARC. METHODS: We analysed data from the 2019 Brazilian National Health Survey, a nationally representative household survey. The composite ARC outcome was considered present when an individual reported a past-year episode of activity failure, amnesia, and concern by others due to alcohol consumption. Adjusted binary logistic regression models were fitted using a hierarchical approach to calculate the odds ratios (OR) and respective 95% confidence intervals (CI), and to assess the contribution of each set of variables in attenuating the educational differences in ARC. RESULTS: Those from the lowest educational strata (incomplete elementary school) exhibited higher odds of ARC than their counterparts (OR: 2.03; 95% CI: 1.73-2.37). Although smoking, BMI, and depression attenuated the educational gradient (i.e. reduced the difference between reference and riskier categories) in ARC by ~13%, the adjustment for AVC and HED amplified inequalities by 0.3% and 5.7%, respectively. CONCLUSION: We found evidence of the AHP in Brazil. Educational inequalities in ARC were scarcely attenuated by behavioural factors, and a suppression effect was noted when adjusting for AVC and HED.


Assuntos
Consumo de Bebidas Alcoólicas , Escolaridade , Humanos , Brasil/epidemiologia , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Consumo de Bebidas Alcoólicas/epidemiologia , Adulto Jovem , Adolescente , Depressão/epidemiologia , Inquéritos Epidemiológicos , Índice de Massa Corporal , Fumar/epidemiologia , Fatores Socioeconômicos , Idoso
14.
Bioresour Technol ; 402: 130763, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38692377

RESUMO

The fungus Thermothelomyces thermophilus is a thermotolerant microorganism that has been explored as a reservoir for enzymes (hydrolytic enzymes and oxidoreductases). The functional analysis of a recombinant cellobiose dehydrogenase (MtCDHB) from T. thermophilus demonstrated a thermophilic behavior, an optimal pH in alkaline conditions for inter-domain electron transfer, and catalytic activity on cellooligosaccharides with different degree of polymerization. Its applicability was evaluated to the sustainable production of cellobionic acid (CBA), a potential pharmaceutical and cosmetic ingredient rarely commercialized. Dissolving pulp was used as a disaccharide source for MtCDHB. Initially, recombinant exoglucanases (MtCBHI and MtCBHII) from T. thermophilus hydrolyzed the dissolving pulp, resulting in 87% cellobiose yield, which was subsequently converted into CBA by MtCDHB, achieving a 66% CBA yield after 24 h. These findings highlight the potential of MtCDHB as a novel approach to obtaining CBA through the bioconversion of a plant-based source.


Assuntos
Desidrogenases de Carboidrato , Proteínas Recombinantes , Desidrogenases de Carboidrato/metabolismo , Proteínas Recombinantes/metabolismo , Concentração de Íons de Hidrogênio , Dissacarídeos/biossíntese , Dissacarídeos/metabolismo , Temperatura , Celobiose/metabolismo , Sordariales/enzimologia , Hidrólise , Eurotiales/enzimologia
15.
Nutrients ; 16(10)2024 May 10.
Artigo em Inglês | MEDLINE | ID: mdl-38794680

RESUMO

With a significant portion of the population adopting veganism and conflicting views among nutrition professionals regarding the necessity of vitamin B12 supplementation, this review aims to explore existing studies evaluating interventions through food supplementation. It focuses on the impact of vitamin B12 deficiency across different demographics. The present study seeks to understand how research has addressed the relationship between the rise in veganism and vitamin B12 deficiency over the past decade. A scoping review was conducted following the PRISMA flow diagram. Studies from 2010 to 2023 were identified using Boolean operators and key terms in electronic databases such as PubMed/MEDLINE, Web of Science, and EBSCO (Library, Information Science & Technology Abstracts, and Academic Search Complete). Out of 217 articles identified, 70 studies were included. The topical analysis categorized the studies into three groups: those associating vitamin B12 deficiency with diseases (n = 14), those analyzing the dietary habits of vegetarian individuals (vegan or not) without a specific focus on vitamin B12 (n = 49), and those addressing food guides and nutrition institution positions (n = 7). The authors concluded that vitamin B12 deficiency is prevalent among vegans due to limited consumption of animal products. For vegetarians, supplementation is an efficient means of treating and preventing deficiency; a daily dose of 50 to 100 micrograms is advised. There are still significant gaps in the research, nevertheless, such as the absence of randomized controlled trials evaluating various forms or dosages of vitamin B12 among vegetarians and the requirement for more information and awareness of the vitamin's significance in vegan diets.


Assuntos
Dieta Vegana , Suplementos Nutricionais , Veganos , Deficiência de Vitamina B 12 , Vitamina B 12 , Humanos , Vitamina B 12/administração & dosagem , Deficiência de Vitamina B 12/epidemiologia , Dieta Vegetariana , Adulto , Feminino , Masculino , Pessoa de Meia-Idade , Adolescente , Adulto Jovem , Idoso
16.
AJOG Glob Rep ; 4(2): 100352, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38694484

RESUMO

Preeclampsia is a syndrome that continues to be a major contributor to maternal and neonatal mortality, especially in low-income countries. Low-dose aspirin reduces the risk of preeclampsia, but the mechanism is still unknown. Risk factors to identify women at risk of preeclampsia are based on clinical characteristics. Women identified as high-risk would benefit from aspirin treatment initiated, preferably at the end of the first trimester. Current efforts have largely focused on developing screening algorithms that incorporate clinical risk factors, maternal biomarkers, and uterine artery Doppler evaluated in the first trimester. However, most studies on preeclampsia are conducted in high-income settings, raising uncertainties about whether the information gained can be totally applied in low-resource settings. In low- and middle-income countries, lack of adequate antenatal care and late commencement of antenatal care visits pose significant challenges for both screening for preeclampsia and initiating aspirin treatment. Furthermore, the preventive effect of first-trimester screening based on algorithms and subsequent aspirin treatment is primarily seen for preterm preeclampsia, and reviews indicate minimal or no impact on reducing the risk of term preeclampsia. The lack of evidence regarding the effectiveness of aspirin in preventing term preeclampsia is a crucial concern, as 75% of women will develop this subtype of the syndrome. Regarding adverse outcomes, low-dose aspirin has been linked to a possible higher risk of postpartum hemorrhage, a condition as deadly as preeclampsia in many low- and middle-income countries. The increased risk of postpartum hemorrhage among women in low-income settings should be taken into consideration when discussing which pregnant women would benefit from the use of aspirin and the ideal aspirin dosage for preventing preeclampsia. In addition, women's adherence to aspirin during pregnancy is crucial for determining its effectiveness and complications, an aspect often overlooked in trials. In this review, we analyze the knowledge gaps that must be addressed to safely increase low-dose aspirin use in low- and middle-income countries, and we propose directions for future research.

17.
Chemosphere ; 358: 142240, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38705417

RESUMO

The Aedes aegypti mosquito is a vector for various arboviruses, including dengue and yellow fever. Insecticides, such as pyrethroids and organophosphates, are widely used to manage and control these insects. However, mosquitoes have developed resistance to these chemicals. Therefore, this study aimed to investigate the effects of the commercial formulation of fipronil (Tuit® Florestal; 80% purity) on the survival, behavior, morphology, and proteins related to signaling pathways of the midgut in A. aegypti larvae under controlled laboratory conditions. Significant reductions in immature survival were observed in all concentrations of fipronil tested. Low insecticide concentration (0.5 ppb) led to decreased locomotor activity in the larvae and caused disorganization of the epithelial tissue in the midgut. Moreover, exposure to the insecticide decreased the activity of detoxifying enzymes such as catalase, superoxide dismutase, and glutathione-S-transferase. On the other hand, the insecticide increased protein oxidation and nitric oxide levels. The detection of LC3, caspase-3, and JNK proteins, related to autophagy and apoptosis, increased after exposure. However, there was a decrease in the positive cells for ERK 1/2. Furthermore, the treatment with fipronil decreased the number of positive cells for the proteins FMRF, Prospero, PH3, Wg, Armadillo, Notch, and Delta, which are related to cell proliferation and differentiation. These findings demonstrate that even at low concentrations, fipronil exerts larvicidal effects on A. aegypti by affecting behavior and enzymatic detoxification, inducing protein oxidation, free radical generation, midgut damage and cell death, and inhibiting cell proliferation and differentiation. Thus, this insecticide may represent a viable alternative for controlling the spread of this vector.


Assuntos
Aedes , Inseticidas , Larva , Pirazóis , Animais , Aedes/efeitos dos fármacos , Aedes/crescimento & desenvolvimento , Aedes/fisiologia , Pirazóis/toxicidade , Inseticidas/toxicidade , Larva/efeitos dos fármacos , Mosquitos Vetores/efeitos dos fármacos , Mosquitos Vetores/fisiologia , Sistema Digestório/efeitos dos fármacos
18.
Pregnancy Hypertens ; 36: 101126, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38669914

RESUMO

The role of magnesium sulfate for treatment of eclampsia is well established. The medication proved to be superior to other anticonvulsants to reduce the incidence of recurrent convulsions among women with eclampsia. Additionally, magnesium sulfate has been indicated for women with preeclampsia with different severe features. However, despite these recommendations, many clinicians are still not confident with the use of magnesium sulfate, even in settings with high incidence of preeclampsia and unacceptable rates of maternal mortality. This review brings basic science and clinical information to endorse recommendations to encourage clinicians to use magnesium sulfate for patients with all severe features of preeclampsia, not only for women with neurological symptoms. Additionally, other benefits of magnesium sulfate in anesthesia and fetal neuroprotection are also presented. Finally, a comprehensive algorithm presents recommendations to manage patients with preeclampsia with severe features between 34 and 36+6 weeks.


Assuntos
Anticonvulsivantes , Sulfato de Magnésio , Pré-Eclâmpsia , Humanos , Sulfato de Magnésio/uso terapêutico , Sulfato de Magnésio/administração & dosagem , Feminino , Gravidez , Pré-Eclâmpsia/tratamento farmacológico , Anticonvulsivantes/uso terapêutico
19.
Molecules ; 29(7)2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-38611856

RESUMO

SARS-CoV-2 is the virus responsible for a respiratory disease called COVID-19 that devastated global public health. Since 2020, there has been an intense effort by the scientific community to develop safe and effective prophylactic and therapeutic agents against this disease. In this context, peptides have emerged as an alternative for inhibiting the causative agent. However, designing peptides that bind efficiently is still an open challenge. Here, we show an algorithm for peptide engineering. Our strategy consists of starting with a peptide whose structure is similar to the interaction region of the human ACE2 protein with the SPIKE protein, which is important for SARS-COV-2 infection. Our methodology is based on a genetic algorithm performing systematic steps of random mutation, protein-peptide docking (using the PyRosetta library) and selecting the best-optimized peptides based on the contacts made at the peptide-protein interface. We performed three case studies to evaluate the tool parameters and compared our results with proposals presented in the literature. Additionally, we performed molecular dynamics (MD) simulations (three systems, 200 ns each) to probe whether our suggested peptides could interact with the spike protein. Our results suggest that our methodology could be a good strategy for designing peptides.


Assuntos
COVID-19 , Glicoproteína da Espícula de Coronavírus , Humanos , SARS-CoV-2 , Peptídeos/farmacologia
20.
Nutrients ; 16(7)2024 Mar 29.
Artigo em Inglês | MEDLINE | ID: mdl-38613040

RESUMO

The frequency of fast food consumption among higher education students is high, causing worrying implications for public health. This study aims to relate the factors that influence the choice for fast food with social factors, nutritional status, and fast food consumption in a sample of higher education students in Portugal. An online questionnaire was developed and disseminated by social networks among students during the first half of 2023. Two hundred and thirty-seven students participated, mainly female (65.4%), who were attending public higher education institutions (59.1%), with a median of age of 20.0 (19.0; 22.0) years, and about 20% of the sample had overweight. Approximately 80% consumed fast food, and almost 40% consumed it more than once or twice a week. Predominantly (78.0%), they chose hamburger meals, spending EUR 8.0 per meal. The factors that most influenced the choice of fast food were ease or convenience of preparation (59.9%), price (48.5%), and flavor (28.3%). There were also differences between sexes and between those attending public and private higher education institutions regarding whether they usually consume fast food or not. The body mass index was positively associated with age (r: 0.142; p = 0.029) and with fast food spending (r: 0.146; p = 0.024). The results have implications for public health and clinical nutrition, and can support more effective strategies to improve food choices in higher education students.


Assuntos
Fast Foods , Estudantes , Feminino , Humanos , Masculino , Portugal , Índice de Massa Corporal , Refeições
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