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1.
Artigo em Inglês | MEDLINE | ID: mdl-39389417

RESUMO

OBJECTIVES: Left atrioventricular valve (LAVV) operation following repair of atrioventricular septal defects (AVSD) can be challenging. We sought to describe characteristics and outcomes of patients requiring LAVV operation. METHODS: Retrospective review of AVSDs requiring LAVV operation between 2000-2020. Patients who experienced adverse events (AEs; defined as the need for a LAVV reoperation (repair or replacement) or death) were compared to patients without AEs. Freedom from adverse events was displayed using the Kaplan-Meier method. Reoperation and death were characterized in terms of cumulative incidence function, estimated using competing risk models. RESULTS: Of 843 patients with AVSD repaired, 59 (7.3%) required a LAVV operation and 7 (9%) valve replacement. A simple repair (cleft closure and/or annuloplasty) occurred in 26 (48.1%) and complex repair using multiple techniques in 28 (51.8%) cases. Eleven patients (20%) required further LAVV reoperation; 3 replacement of mechanical valve, 6 new valve replacement (2 Melody, 4 Mechanical) and 2 re-repair. The cumulative incidence of freedom from AE was 84.1% (75.0%, 94.2%), 78.3% (68.2%, 90.0%), 73.4% (62.2%, 86.7%), 69.7% (57.5%, 84.7%) at 1, 5, 10 and 15 years respectively. Cox univariable regression showed smaller weight (p=0.027) and early need for LAVV operation (p=0.02) were associated with AEs while cleft closure (p = 0.003) was protective against AEs. The estimated cumulative incidence of reoperation was higher in complex repairs (17.3% (7.8%, 38.7%) vs 0.5% (NA, NA) at 1 year. Greys p = 0.02). In a comparison of eras (2000-2009, 2010- 2020) there was no difference in AE (Greys p = 0.96). CONCLUSIONS: Adverse outcomes following LAVV reoperation remain common. Smaller infants, those requiring earlier reoperation and complex type repairs are at highest risk. Future studies should focus on which high risk LAVVs are more suited to early LAVV replacement.

2.
Materials (Basel) ; 17(18)2024 Sep 16.
Artigo em Inglês | MEDLINE | ID: mdl-39336286

RESUMO

Functionally Graded Materials (FGMs) can outperform their homogeneous counterparts. Advances in digitalization technologies, mainly additive manufacturing, have enabled the synthesis of materials with tailored properties and functionalities. Joining dissimilar metals to attain compositional grading is a relatively unexplored research area and holds great promise for engineering applications. Metallurgical challenges may arise; thus, a theoretical critical analysis is presented in this paper. A multidisciplinary methodology is proposed here to unify optimal design, multi-feed Wire-Arc Additive Manufacturing (WAAM), and image-based characterization methods to create structure-specific oriented FGM parts. Topology optimization is used to design FGMs. A beam under pure bending is used to explore the layer-wise FGM concept, which is also analytically validated. The challenges, limitations, and role of WAAM in creating FGM parts are discussed, along with the importance of numerical validation using full-field deformation data. As a result, a conceptual FGM engineering workflow is proposed at this stage, enabling digital data conversion regarding geometry and compositional grading. This is a step forward in processing in silico data, with a view to experimentally producing parts in future. An optimized FGM beam, revealing an optimal layout and a property gradient from iron to copper along the build direction (bottom-up) that significantly reduces the normal pure bending stresses (by 26%), is used as a case study to validate the proposed digital workflow.

3.
Front Nutr ; 11: 1404932, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39301418

RESUMO

It is not always the case that recipe disaggregation is performed in dietary surveys. This investigation aimed to assess the influence of recipe disaggregation in the 2020-2021 national dietary survey in Saint Kitts and Nevis, and provide recommendations for future assessments. A total of 1,004 individuals provided information on their food consumption obtained using 24-h dietary recalls, and 442 recipes were reported. Some recipes were reported as single ingredients at the data collection stage (n = 65). In most cases, the respondent provided a standard recipe without disaggregation (n = 377). A simple and pragmatic recipe disaggregation methodology was developed. The procedure of recipe disaggregation comprised nine steps, including identifying recipes, ingredients, quantities, conversion factors, and the presence of visible fluid, among others. Seventy-eight non-disaggregated standard recipes were post-disaggregated (21% of recipes) to identify ingredient weights. Either the chi-square or Fisher's exact tests were applied to assess the significance of differences in frequency of food group consumption before and after disaggregation. The proportion of consumers across the different food groups increased dramatically for some food groups after recipe disaggregation, with significant differences (all p < 0.01) for cereals and their products (81.3% before and 94.7% after), eggs and their products (21.7% before and 34.6% after), fats and oils (6.9% before and 44.5% after), fish, shellfish and their products (26.7% before and 38.5% after), meat and meat products (59.7% before and 71.4% after), milk and milk products (30.4% before and 46.1% after), pulses, seeds, nuts and their products (18.6% before and 49.2% after), spices and condiments (34.0% before and 68.5% after, and vegetables and their products (49.9% before and 76.6% after). Consequently, most of the reported intakes in grams were also influenced across all food groups. Recipes are an important source of food consumption, and their disaggregation should be carefully considered in dietary assessment.

4.
Aesthet Surg J Open Forum ; 6: ojae003, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38938925

RESUMO

Background: Lip aging is a concern for many, and hyaluronic acid (HA) injections are a popular solution. Objectives: This study compared 2 different HA gel technologies (OBT and NASHA) for lip augmentation in 20 volunteers. Methods: Both groups received treatment from the same injector using the same method. Lip volume was measured with a 3D stereophotogrammetry device before, immediately after, and 30 days posttreatment. Patient satisfaction and adverse events were assessed through FACE-Q scales analysis. Results: The NASHA group showed an immediate volume increase (P = .01), which decreased after 30 days. The OBT group did not show a significant immediate growth (P = .535) but did exhibit a significant increase after 30 days (P = .014). After 30 days, there were no significant volume differences between the groups (P = .802 and P = .999). FACE-Q analysis revealed no significant differences among groups after 30 days. Conclusions: This study highlights that less cohesive gels may modify faster in dynamic lip areas, emphasizing the importance of selecting products based on their physicochemical and rheological properties. In the context of lip augmentation with HA, it is important not to consider immediate aesthetic changes as definitive results, as volume changes may persist and develop over time after the treatment.

6.
J Psychiatr Res ; 175: 144-152, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38733929

RESUMO

Symptom provocation paradigms are paramount to understand a heterogeneous disorder as obsessive-compulsive disorder (OCD). The main aim of our work was to develop and validate an open-access set of OCD-related images comprising three main subtypes: washing, checking, and symmetry. Twenty-six OCD patients and 25 controls provided valence and arousal ratings for a set of OCD-related, aversive, and neutral images. Linear mixed model analyses were used to estimate the main effects of group, image category, and group-image category interaction in image ratings. All main effects were found to be significant for both arousal and valence ratings, except for the group in arousal ratings. Path analysis confirmed our hypothesis that the OCI-R subscales influenced the subjective ratings of the corresponding image categories, particularly among patients. Independent samples t-tests were performed for each OCD picture to compose the set. Arousal demonstrated a greater capacity to distinguish controls and patients, thus sustaining our choice of using these ratings for the final Braga Obsessive-Compulsive Image Set (BOCIS). Our study demonstrated that the stimuli of the BOCIS reliably portray OCD-like triggers for washing, checking and symmetry subtypes. Its open-access availability will facilitate significant progress in both clinical and research settings.


Assuntos
Transtorno Obsessivo-Compulsivo , Humanos , Transtorno Obsessivo-Compulsivo/fisiopatologia , Transtorno Obsessivo-Compulsivo/diagnóstico , Feminino , Masculino , Adulto , Escalas de Graduação Psiquiátrica/normas , Pessoa de Meia-Idade , Adulto Jovem , Nível de Alerta/fisiologia , Estimulação Luminosa , Reprodutibilidade dos Testes
8.
J Environ Manage ; 354: 120354, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38394876

RESUMO

In recent years, the loss of forest in the Brazilian Amazon has taken on alarming proportions, with 2021 recording the largest increase in 13 years, particularly in the Abunã-Madeira Sustainable Development Reserve (SDR). This has significant environmental, social, and economic repercussions globally and for the local communities reliant on the forest. Analyzing deforestation patterns and trends aids in comprehending the dynamics of occupation and deforestation within a critical Amazon region, enabling the inference of potential occupation pathways. This understanding is crucial for identifying deforestation expansion zones and shaping public policies to curb deforestation. Decisions by the Brazilian government regarding landscape management will have profound environmental implications. We conducted an analysis of deforestation patterns and trends up to 2021 in the municipality (county) of Lábrea, located in the southern portion of Amazonas state. Deforestation processes in this area are likely to spread to the adjacent "Trans-Purus" region in western Amazonas, where Amazonia's largest block of remaining rainforest is at risk from planned highways. Annual deforestation polygons from 2008 to 2021 were categorized based on occupation typologies linked to various actors and processes defined for the region (e.g., diffuse, linear, fishbone, geometric, multidirectional, and consolidated). These patterns were represented through 10 × 10 km grid cells. The findings revealed that Lábrea's territory is predominantly characterized by the diffuse pattern (initial occupation stage), mainly concentrated in protected areas. Advanced occupation patterns (multidirectional and consolidated) were the primary contributors to deforestation during this period. Observed change trajectories included consolidation (30.8%) and expansion (19.6%) in the southern portion of the municipality, particularly along the Boi and Jequitibá secondary roads, providing access to large illegal landholdings. Additionally, non-change trajectories (67%) featured initial occupation patterns near rivers and in protected areas, likely linked to riverine and extractive communities. Tailoring measures to control deforestation based on actor types and considering stages of occupation is crucial. The techniques developed in this study provide a comprehensive approach for Amazonia and other tropical regions.


Assuntos
Conservação dos Recursos Naturais , Florestas , Brasil , Floresta Úmida , Desenvolvimento Sustentável
9.
Eur J Cardiothorac Surg ; 65(3)2024 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-38058180

RESUMO

OBJECTIVES: To compare the independent and combined effects of anaemia and red blood cell transfusion on late survival after isolated coronary artery bypass grafting. METHODS: Retrospective analysis of 5243 consecutive patients undergoing primary isolated coronary artery bypass grafting, performed from 2000 to 2015, in a Portuguese Academic Hospital. We identified 1649 patients with preoperative anaemia (A+) and 1422 patients who received a perioperative transfusion (T+)-the 4 possible combinations allowed for the creation of 4 subgroups (A-/T-, A-/T+, A+/T- and A+/T+). The primary endpoint was all-cause mortality at 10 years. We employed inverse probability weighting to control for confounding variables. RESULTS: Thirty-one percent of the patients had preoperative anaemia, and 27.0% had at least one packed red blood cell transfusion. Inverse probability weighting was effective in eliminating differences in all significant baseline characteristics. The primary endpoint of all-cause mortality at 10 years occurred in 568 patients (20.5%) in the A-/T- group, as compared with 204 (24.4%) in the A-/T+ group (hazard ratio, 1.14; 95% confidence interval, 1.00 to 1.31; P = 0.053), 358 (33.8%) in the A+/T- group (hazard ratio, 1.53; 95% confidence interval, 1.38 to 1.71; P < 0.001), 254 (43.6%) in the A+/T+ group (hazard ratio, 2.25; 95% confidence interval, 1.97 to 2.56; P < 0.001). CONCLUSIONS: This longitudinal, population-level study emphasizes the adverse long-term outcomes of preoperative anaemia and perioperative red blood cell transfusion. It stresses the importance of an evidence-based, multimodal and multidisciplinary approach to conserving blood resources and optimizing outcomes in patients at high risk for transfusion.


Assuntos
Anemia , Ponte de Artéria Coronária , Humanos , Estudos Retrospectivos , Ponte de Artéria Coronária/efeitos adversos , Transfusão de Sangue , Transfusão de Eritrócitos , Anemia/complicações , Anemia/terapia
10.
Artigo em Inglês | LILACS | ID: biblio-1558986

RESUMO

Abstract Objectives: to assess the association between pregnant women's consumption of ultra-processed foods and newborn body weight. Methods: prospective study with pregnant women (n=214) selected from all Basic Health Units in the city of Pinhais, Paraná. Socioeconomic, demographic, and health data were collected. Food consumption data were assessed using a 24-hour dietary recall and tabulated with GloboDiet software. Daily relative energy intake of ultra-processed food was estimated and logistic regression analysis was utilized. The infuence of covariates on the association analysis was also explored (e.g., income and education). Results: ultra-processed foods contributed to 26.9% of pregnant women's total energy intake. About 5.7% of newborns were classifed as small-for-gestational-age and 10.7% as large-for-gestational-age. A borderline statistically signifcant association was observed between large-for-gestational-age newborn weight and maternal consumption of ultra-processed foods (OR= 1.027; p=0.048). Additionally, family income was associated with the consumption of ultra-processed foods (OR= 0.144; p=0.008). With each additional 1% consumption of ultra-processed foods, mothers' likelihood of having large-for-gestational-age babies increased by about 2.7%. Conclusions: the study reveals a trend of positive association between the weight of large-for-gestational-age newborns and the consumption of ultra-processed foods by pregnant women, but not for small-for-gestational-age children.


Resumo Objetivos: avaliar a associação entre o consumo de alimentos ultraprocessados por gestantes e o peso de recém-nascidos. Métodos: estudo prospectivo com gestantes (n=214) selecionadas em Unidades Básicas de Saúde em Pinhais, Paraná. Dados socioeconômicos, demográfcos e de saúde foram coletados. Dados de consumo alimentar foram coletados por recordatório de 24-horas físico e entrados no software GloboDiet. O consumo diário relativo de energia proveniente de alimentos ultraprocessados foi estimado e a análise de regressão logística foi utilizada, considerando covariáveis como renda familiar e escolaridade. Resultados: o consumo de alimentos ultraprocessados pelas gestantes representou 26,9% da energia total. Cerca de 5,7% de recém-nascidos foram classifcados como pequenos para idade gestacional (PIG) e 10,7% como grandes para idade gestacional (GIG). Foi observada uma associação estatisticamente signifcativa limítrofe entre o peso dos recém-nascidos GIG e o consumo materno de alimentos ultraprocessados (OR= 1,027; p=0,048). Além disso, a renda familiar esteve associada com o consumo de alimentos ultraprocessados (OR=0,144; p=0,008). A cada 1% adicional de consumo de alimentos ultraprocessados, a probabilidade de as mães terem recém-nascidos GIG aumentou cerca de 2,7%. Conclusões: o estudo revela uma tendência de associação positiva entre o peso de recém-nascidos GIG e o consumo de alimentos ultraprocessados por mulheres grávidas, mas não para crianças PIG.


Assuntos
Humanos , Feminino , Gravidez , Recém-Nascido , Peso ao Nascer , Ingestão de Alimentos , Nutrição Materna , Nutrição da Gestante , Alimento Processado , Brasil , Fatores Sociodemográficos
11.
Cerebellum ; 2023 Nov 11.
Artigo em Inglês | MEDLINE | ID: mdl-37950147

RESUMO

Next-generation sequencing (NGS), comprising targeted panels (TP), exome sequencing (ES), and genome sequencing (GS) became robust clinical tools for diagnosing hereditary ataxia (HA). Determining their diagnostic yield (DY) is crucial for optimal clinical decision-making. We conducted a comprehensive systematic literature review on the DY of NGS tests for HA. We searched PubMed and Embase databases for relevant studies between 2016 and 2022 and manually examined reference lists of relevant reviews. Eligible studies described the DY of NGS tests in patients with ataxia as a significant feature. Data from 33 eligible studies showed a median DY of 43% (IQR = 9.5-100%). The median DY for TP and ES was 46% and 41.9%, respectively. Higher DY was associated with specific phenotype selection, such as episodic ataxia at 68.35% and early and late onset of ataxia at 46.4% and 54.4%. Parental consanguinity had a DY of 52.4% (p = 0.009), and the presumed autosomal recessive (AR) inheritance pattern showed 62.5%. There was a difference between the median DY of studies that performed targeted sequencing (tandem repeat expansion, TRE) screening and those that did not (p = 0.047). A weak inverse correlation was found between DY and the extent of previous genetic investigation (rho = - 0.323; p = 0.065). The most common genes were CACNA1A and SACS. DY was higher for presumed AR inheritance pattern, positive family history, and parental consanguinity. ES appears more advantageous due to the inclusion of rare genes that might be excluded in TP.

12.
Behav Sci (Basel) ; 13(10)2023 Oct 16.
Artigo em Inglês | MEDLINE | ID: mdl-37887494

RESUMO

Positive mental health is defined as the ability to perceive and interpret the context of a situation and to adapt to it whenever necessary. Considering the pandemic situation, identifying the factors that may have the greatest impact on quality of life and consequently, on positive mental health is paramount. The objective of this study was to assess the impact of health literacy on the adoption of behaviours that promote positive mental health during COVID-19. A descriptive, cross-sectional and correlational study was conducted on a sample of 770 patients using a questionnaire for sociodemographic characterization, the Positive Mental Health Questionnaire and the Mental Health Knowledge Questionnaire. Concerning health-promoting behaviours, those who sleep enough hours, exercise regularly, eat healthy and are more aware of mental health promotion activities, or have greater mental health literacy, have higher positive mental health scores. Thus, having more knowledge of mental health and adopting health-promoting behaviours improve positive mental health.

13.
Nutrients ; 15(17)2023 Aug 29.
Artigo em Inglês | MEDLINE | ID: mdl-37686807

RESUMO

Acute leukemia commonly occurs in young children with peak incidence at the age of 2-5 years. However, the etiology is still unclear and many preventable risk factors still deserve to be reviewed. The focus of this systematic review and meta-analysis is to summarize the evidence concerning early life nourishment (breastfeeding, early life diet), neonatal vitamin K administration and the risk of acute leukemia. All epidemiological studies published up to June 2023 and assessing diet-related risk factors for childhood acute leukemia were identified in two electronic databases (PubMed and Web of Science), with no limits on publication year or language. A total of 38 studies (37 case-control studies and 1 study with pooled analysis) were included. The published risk estimates were combined into a meta-analysis using the Generic Inverse Variance method. The current evidence shows that breastfeeding (yes vs. no) has a protective effect against acute lymphoblastic leukemia (odds ratio = 0.85; 95% CI, 0.76-0.94). Evidence related to the role of other studied factors (foods and supplements) is inconclusive. Further research into the potential role of diet in early life and the risk of acute leukemia is needed to develop prevention strategies at population level. Review Registration: PROSPERO registration no. CRD42019128937.


Assuntos
Leucemia Mieloide Aguda , Recém-Nascido , Feminino , Humanos , Criança , Pré-Escolar , Leucemia Mieloide Aguda/epidemiologia , Leucemia Mieloide Aguda/etiologia , Estado Nutricional , Aleitamento Materno , Estudos de Casos e Controles , Suplementos Nutricionais
14.
J Cosmet Dermatol ; 22(11): 2950-2956, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37632259

RESUMO

BACKGROUND: A previous injection algorithm termed the "Toxin Lift" was recently introduced and described volume increases in the midface following neuromodulator treatments of the jawline. Increase in midfacial volume due to soft tissue repositioning could also affect the severity of infraorbital hollows. OBJECTIVE: The objective is therefore to evaluate whether the severity of infraorbital hollows can be improved by injecting neuromodulators in the supra-mandibular segment of the platysma. MATERIALS AND METHODS: A total of 35 volunteers (11 males/24 females) with a mean age of 39.8 (9.6) years and a mean BMI of 25.2 (5.2) kg/m2 were investigated. Bilateral infraorbital regions were evaluated via clinical assessment and semi-quantitative 3D imaging. The applied injection technique targeted the platysma via four injection points administering 5 I.U. per injection point resulting in a total of 20 I.U. per facial side. RESULTS: Volume increase of the infraorbital region was 0.13 cc at 15 days (p = 0.001) and was 0.02 cc at 30 days (p = 0.452) whereas the skin displacement in cranial direction was 0.54 mm at 15 days (p < 0.001) and was 0.31 mm at 30 days (p < 0.001). Clinical evaluation revealed a highly statistically significant improvement of the tear trough, palpaebromalar groove, and of the lid-cheek junction when compared to baseline with all p < 0.001. CONCLUSION: The results of this clinical prospective interventional analysis revealed that the "Toxin Lift" injection technique is capable to improve the clinical appearance of infraorbital hollows. The effects can be explained by the concepts of facial biomechanics.

15.
Life Sci Alliance ; 6(8)2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-37290814

RESUMO

Apolipoprotein E4 (ApoE4) is the most important genetic risk factor for Alzheimer's disease (AD). Among the earliest changes in AD is endosomal enlargement in neurons, which was reported as enhanced in ApoE4 carriers. ApoE is thought to be internalized into endosomes of neurons, whereas ß-amyloid (Aß) accumulates within neuronal endosomes early in AD. However, it remains unknown whether ApoE and Aß intersect intracellularly. We show that internalized astrocytic ApoE localizes mostly to lysosomes in neuroblastoma cells and astrocytes, whereas in neurons, it preferentially localizes to endosomes-autophagosomes of neurites. In AD transgenic neurons, astrocyte-derived ApoE intersects intracellularly with amyloid precursor protein/Aß. Moreover, ApoE4 increases the levels of endogenous and internalized Aß42 in neurons. Taken together, we demonstrate differential localization of ApoE in neurons, astrocytes, and neuron-like cells, and show that internalized ApoE intersects with amyloid precursor protein/Aß in neurons, which may be of considerable relevance to AD.


Assuntos
Doença de Alzheimer , Precursor de Proteína beta-Amiloide , Humanos , Precursor de Proteína beta-Amiloide/genética , Apolipoproteína E4/genética , Apolipoproteínas E/genética , Peptídeos beta-Amiloides/genética , Doença de Alzheimer/genética , Neurônios/fisiologia
16.
J. pediatr. (Rio J.) ; J. pediatr. (Rio J.);99(3): 219-227, May-June 2023. tab, graf
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-1440467

RESUMO

Abstract Objective The present study aimed to evaluate the effects of GH treatment on the body composition of children born with SGA. Methods This study is a systematic review of the literature. CINAHL, Embase; Medline/Pubmed, Scopus and Web of Science were searched from inception to March 2022. Results Four studies met the inclusion criteria, with an intervention time of 1 to 3 years, using doses from 0.03 to 0.07 mg/kg/day of GH. Bone densitometry by dual-energy X-ray absorptiometry (DXA) with whole-body scans was the most used method to assess body composition. Most studies (n= 3) had SGA children as a control group with the same characteristics as the case group; the mean age was similar between the groups (minimum of 5.1 ± 1.4 years and maximum of 6.7 ± 1 0.8 years) and all participants had an average height ≤ -3DP. The Lean Mass (LM) and Fat Mass (FM) outcomes of the studies were not presented in a standardized manner; thus, they cannot be compared. There was a significant increase in LM in the group treated with GH in relation to the pre-treatment period and in comparison, to the untreated control group. Three studies showed a significant decrease in FM at the end of the intervention period, and in two studies, this decrease occurred in the control group. Conclusions Despite the differences in the presentation of results and in the evaluation periods, the results of the studies showed that growth hormone favors the gain and maintenance of lean mass, and it also affects fat mass reduction and redistribution.

17.
Traffic ; 24(7): 284-307, 2023 07.
Artigo em Inglês | MEDLINE | ID: mdl-37129279

RESUMO

A key event in atherogenesis is the formation of lipid-loaded macrophages, lipidotic cells, which exhibit irreversible accumulation of undigested modified low-density lipoproteins (LDL) in lysosomes. This event culminates in the loss of cell homeostasis, inflammation, and cell death. Nevertheless, the exact chemical etiology of atherogenesis and the molecular and cellular mechanisms responsible for the impairment of lysosome function in plaque macrophages are still unknown. Here, we demonstrate that macrophages exposed to cholesteryl hemiazelate (ChA), one of the most prevalent products of LDL-derived cholesteryl ester oxidation, exhibit enlarged peripheral dysfunctional lysosomes full of undigested ChA and neutral lipids. Both lysosome area and accumulation of neutral lipids are partially irreversible. Interestingly, the dysfunctional peripheral lysosomes are more prone to fuse with the plasma membrane, secreting their undigested luminal content into the extracellular milieu with potential consequences for the pathology. We further demonstrate that this phenotype is mechanistically linked to the nuclear translocation of the MiT/TFE family of transcription factors. The induction of lysosome biogenesis by ChA appears to partially protect macrophages from lipid-induced cytotoxicity. In sum, our data show that ChA is involved in the etiology of lysosome dysfunction and promotes the exocytosis of these organelles. This latter event is a new mechanism that may be important in the pathogenesis of atherosclerosis.


Assuntos
Aterosclerose , Ésteres do Colesterol , Humanos , Ésteres do Colesterol/metabolismo , Macrófagos/metabolismo , Lisossomos/metabolismo , Aterosclerose/metabolismo , Exocitose
18.
Traffic ; 24(8): 334-354, 2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-37218497

RESUMO

Previously, we found that age-dependent accumulation of beta-amyloid is not sufficient to cause synaptic decline. Late-endocytic organelles (LEOs) may be driving synaptic decline as lysosomes (Lys) are a target of cellular aging and relevant for synapses. We found that LAMP1-positive LEOs increased in size and number and accumulated near synapses in aged neurons and brains. LEOs' distal accumulation might relate to the increased anterograde movement in aged neurons. Dissecting the LEOs, we found that late-endosomes accumulated while there are fewer terminal Lys in aged neurites, but not in the cell body. The most abundant LEOs were degradative Lys or endolysosomes (ELys), especially in neurites. ELys activity was reduced because of acidification defects, supported by the reduction in v-ATPase subunit V0a1 with aging. Increasing the acidification of aged ELys recovered degradation and reverted synaptic decline, while alkalinization or v-ATPase inhibition, mimicked age-dependent Lys and synapse dysfunction. We identify ELys deacidification as a neuronal mechanism of age-dependent synapse loss. Our findings suggest that future therapeutic strategies to address endolysosomal defects might be able to delay age-related synaptic decline.


Assuntos
Neurônios , Sinapses , Neurônios/metabolismo , Endossomos/metabolismo , Lisossomos/metabolismo , Adenosina Trifosfatases/metabolismo
19.
Artigo em Inglês | MEDLINE | ID: mdl-37099730

RESUMO

The dietary exposure of six food azo-colours was assessed in a sample of pre-schoolers from Guaratuba-Paraná, Brazil. Consumption data of 323 children aged 2 to 5 years was collected through 3-day food records. Dietary exposure, is expressed by milligrams of food colour by kilogram of body weight per day, as compared to the Acceptable Daily Intake (ADI). Three exposure scenarios were developed to account for uncertainties around consumption estimates. Intakes of Amaranth (INS 123) described in means, 50th and 95th percentiles exceeded ADI levels in the two most conservative scenarios, with the highest percentiles exceeding about four times the ADI. High intakes of Sunset Yellow FCF (INS 110) were also observed, of up to 85% of the ADI in the worst-case scenario. Findings suggest high exposure levels to azo-dyes in the survey population, with children likely exceeding the ADI for Amaranth (INS 123) and concerns for Sunset Yellow FCF (INS 110). Major food contributors were beverages (juice powders and soft drinks), dairy and sweets. Further studies on dietary exposure assessment are needed at the national level. The authors highlight the need of controlling the use of such additives through national policies that are aligned with the consumption patterns observed in the country.


Assuntos
Compostos Azo , Exposição Dietética , Humanos , Pré-Escolar , Criança , Brasil , Cor , Corante Amaranto
20.
Artigo em Inglês | MEDLINE | ID: mdl-37048042

RESUMO

Many studies have investigated the etiology of acute leukemia, one of the most common types of cancer in children; however, there is a lack of clarity regarding preventable risk factors. This systematic review and meta-analysis aimed to summarize the current evidence regarding the role of maternal dietary factors in the development of childhood leukemia. All epidemiological studies published until July 2022 that evaluated maternal dietary risk factors for childhood acute leukemia were identified in two electronic databases (PubMed and Web of Science) without limits of publication year or language. A total of 38 studies (1 prospective cohort study, 34 case-control studies and 3 studies with pooled analysis) were included. The published risk estimates were combined into a meta-analysis, using the Generic Inverse Variance method. The maternal consumption of fruits (two or more daily servings vs. less) was inversely associated with acute lymphoblastic leukemia (odds ratio = 0.71; 95% CI, 0.59-0.86), whereas maternal coffee intake (higher than two cups per day vs. no consumption) was associated with an increased risk of acute lymphoblastic leukemia (odds ratio = 1.45; 95% CI, 1.12-1.89). Despite these findings, more high-quality research from cohort studies and the identification of causal factors are needed to develop evidence-based and cost-effective prevention strategies applicable at the population level. Review Registration: PROSPERO registration no. CRD42019128937.


Assuntos
Leucemia Mieloide Aguda , Leucemia-Linfoma Linfoblástico de Células Precursoras , Criança , Humanos , Estudos Prospectivos , Dieta , Fatores de Risco , Leucemia Mieloide Aguda/epidemiologia , Estudos de Casos e Controles , Leucemia-Linfoma Linfoblástico de Células Precursoras/epidemiologia
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