Oxidative stress and neurotoxicity induced by exposure to settleable atmospheric particulate matter in bullfrog tadpoles, Aquarana catesbeiana, (Shaw, 1802).

Bullfrog tadpoles, Aquarana catesbeiana, were exposed to settleable particulate matter (SePM), (1 g L-1, 96 h) and their organs were collected for analysis of metal/metalloid, oxidative stress and neurotoxicity in liver, muscle, kidney and brain. The SePM water of the exposed groups contained 18 of the 28 metals/metalloids detected in ambient particulate matter (APM). Fe56 and Al were those that presented the highest concentrations, Cr, Mn, Pb and Cu increased from 10 to 20 times and Ti, V, Sr, Rb, Cd, Sn and Ni increased from 1 to 3 times compared to the control. Bioaccumulation of metals/metalloids in the exposure water varied significantly between organs, with the muscle and liver showing the highest concentrations of metals, followed by the brain. Lipoperoxidation and malondialdehyde increased only in muscle, while carbonyl proteins increased only in the liver and brain. Regarding nitric oxide synthase, there was an increase in the liver and brain in the group exposed to SePM. Catalase activity decreased in the liver and muscle, while the activity of glutathione peroxidase, increased in the liver and kidney and decreased in muscle. Glutathione S-transferase, which is mainly responsible for detoxification, increased in the liver and decreased in muscle and the kidney. Cholinesterase activity increased only in the muscle. The results indicate oxidative stress, due to oxidation catalyzed by metals, components of SePM. Thus, the results contribute to the understanding that SePM has a deleterious effect on the aquatic environment, negatively affecting bullfrog tadpoles, in different ways and levels in relation to the analyzed organs.

Translation and cultural adaptation of the Positive Aspects of Caregiving Scale for caregivers of people living with dementia in Brazilian context: a methodological study.

BACKGROUND: The Positive Aspects of Caregiving (PAC) scale is used to assess psychosocial benefits provided to caregivers by the task of caring. The PAC scale consists of nine items, assessed using a five-point Likert scale, with higher values indicating greater positive perceptions and gains from the caregiving experience. OBJECTIVE: To translate and culturally adapt the PAC scale for informal Brazilian caregivers of people with dementia. DESIGN AND SETTING: A methodological study was conducted at the Federal University of São Carlos. METHODS: The following stages were carried out: Translation; Synthesis of the translations; Back-translation; Evaluation by an experts' committee; and Pre-test. RESULTS: Two independent professionals translated the PAC scale. The consensus version was obtained by merging both translations, which were back-translated into English by a third translator. The expert committee comprised three specialists in the area and project researchers. All scale items presented a Content Validity Index of 1 (CVI = 1.0), and thus remained in the pre-final version of the instrument. The instrument was pre-tested with seven caregivers of people with dementia, the majority of whom were women (57.1%), with a degree of kinship corresponding to sons/daughters (57.1%) and an average age of 55.2 (± 4.1) years. The caregivers considered it clear and understandable and made no suggestions for changes. CONCLUSION: The PAC scale was translated and culturally adapted for use by informal caregivers of people with dementia in Brazil. However, a psychometric analysis of the instrument is necessary to provide normative data for this population group.

The Association of Levels of Mindfulness on the Cognitive Performance of Community-Dwelling, Low-Educated Older Adults From a Middle-Income Country.

Limited information exists on the potential link between levels of mindfulness and cognitive performance in seniors with low education. This cross-sectional study aims to explore the association between mindfulness levels and cognitive performance in older adults with different years of education. Participants were grouped by education levels and assessed for cognitive performance (ACE-R; Digit Span test), levels of mindfulness (Langer Mindfulness Scale-21), and depressive symptoms (Geriatric Depression Scale-15). Group comparisons, correlations, and linear and logistic regression analyses were conducted (p < .05). Cognitive performance, mindfulness levels, and depressive symptoms differed between groups, and correlations were found between mindfulness levels, ACE-R, and Digit Span scores. After controlling for education, the association between mindfulness levels and ACE-R performance remained significant. Logistic regression revealed that higher education and mindfulness levels increased the likelihood of scoring above the ACE-R cut-off. This study underscores the association between levels of mindfulness and cognitive performance in older adults.

Cardiovascular responses and the role of the neurohumoral cardiac regulation during digestion in the herbivorous lizard Iguana iguana.

Carnivorous reptiles exhibit an intense metabolic increment during digestion, which is accompanied by several cardiovascular adjustments responsible for meeting the physiological demands of the gastrointestinal system. Postprandial tachycardia, a well-documented phenomenon in these animals, is mediated by the withdrawal of vagal tone associated with the chronotropic effects of non-adrenergic and non-cholinergic (NANC) factors. However, herbivorous reptiles exhibit a modest metabolic increment during digestion and there is no information about postprandial cardiovascular adjustments. Considering the significant impact of feeding characteristics on physiological responses, we investigated cardiovascular and metabolic responses, as well as the neurohumoral mechanisms of cardiac control, in the herbivorous lizard Iguana iguana during digestion. We measured oxygen consumption rate (O2), heart rate (fH), mean arterial blood pressure (MAP), myocardial activity, cardiac autonomic tone, fH/MAP variability and baroreflex efficiency in both fasting and digesting animals before and after parasympathetic blockade with atropine followed by double autonomic blockade with atropine and propranolol. Our results revealed that the peak of O2 in iguanas was reached 24 h after feeding, accompanied by an increase in myocardial activity and a subtle tachycardia mediated exclusively by a reduction in cardiac parasympathetic activity. This represents the first reported case of postprandial tachycardia in digesting reptiles without the involvement of NANC factors. Furthermore, this withdrawal of vagal stimulation during digestion may reduce the regulatory range for short-term fH adjustments, subsequently intensifying the blood pressure variability as a consequence of limiting baroreflex efficiency.

Translation and cultural adaptation of the Positive Aspects of Caregiving Scale for caregivers of people living with dementia in Brazilian context: a methodological study

ABSTRACT BACKGROUND: The Positive Aspects of Caregiving (PAC) scale is used to assess psychosocial benefits provided to caregivers by the task of caring. The PAC scale consists of nine items, assessed using a five-point Likert scale, with higher values indicating greater positive perceptions and gains from the caregiving experience. OBJECTIVE: To translate and culturally adapt the PAC scale for informal Brazilian caregivers of people with dementia. DESIGN AND SETTING: A methodological study was conducted at the Federal University of São Carlos. METHODS: The following stages were carried out: Translation; Synthesis of the translations; Back-translation; Evaluation by an experts' committee; and Pre-test. RESULTS: Two independent professionals translated the PAC scale. The consensus version was obtained by merging both translations, which were back-translated into English by a third translator. The expert committee comprised three specialists in the area and project researchers. All scale items presented a Content Validity Index of 1 (CVI = 1.0), and thus remained in the pre-final version of the instrument. The instrument was pre-tested with seven caregivers of people with dementia, the majority of whom were women (57.1%), with a degree of kinship corresponding to sons/daughters (57.1%) and an average age of 55.2 (± 4.1) years. The caregivers considered it clear and understandable and made no suggestions for changes. CONCLUSION: The PAC scale was translated and culturally adapted for use by informal caregivers of people with dementia in Brazil. However, a psychometric analysis of the instrument is necessary to provide normative data for this population group.

Activation of the cannabinoid type 2 (CB2) receptor improves cardiac contractile performance in fish, Brycon amazonicus.

In addition to their well-known classical effects, cannabinoid CB1 and CB2 receptors have also been involvement in both deleterious and protective actions on the heart under various pathological conditions. While the potential therapeutic applications of the endocannabinoid system in the context of cardiovascular function are indeed a viable prospect, significant debate exists within the literature regarding whether CB1, CB2, or a combination of both receptors exert a favorable influence on cardiac function. Hence, the aim of this study was to investigate the effects of CB1 + CB2 or CB2 agonists on cardiac excitation-contraction (E-C) coupling, utilizing fish (Brycon amazonicus) as an experimental model. The CB2 agonist elicited marked positive inotropic and lusitropic responses in isolated ventricular myocardium, induced cyclic adenosine 3',5'-monophosphate (cAMP) production, and upregulated critical Ca2+ handling proteins, such as sarco/endoplasmic reticulum Ca2+-ATPase (SERCA) and Na+/Ca2+ exchanger (NCX). Our current study demonstrated, for the first time, that CB2 receptor activation-induced effects improved the efficiency of Ca2+ cycling, excitation-contraction coupling (E-C coupling), and cardiac performance in under physiological conditions. Hence, CB2 receptors could be considered a potential therapeutic target for modulating cardiac contractile dysfunctions.

Sense of mastery in caregivers of people living with dementia: translation and cultural adaptation of the Pearlin Mastery Scale / Senso de domínio de cuidadores de pessoas que vivem com demência: tradução e adaptação cultural da Pearlin Mastery Scale

ABSTRACT The sense of mastery is conceptualized as a positive aspect of care targeted at people living with dementia, a coping mechanism to reduce burden, and may represent a protective factor for caregivers' mental and physical health. Objective: To translate and culturally adapt the Pearlin Mastery Scale for Brazil. Methods: A methodological study was conducted at the Federal University of São Carlos in which the initial translation stages were followed; synthesis; back-translation; review by the committee of judges by analyzing the Content Validity Index (CVI); and test of the pre-final version. Results: Two specialists translated the scale into Brazilian Portuguese and defined a consensus version with the researchers. Subsequently, another two specialists back-translated the consensus version, which was reviewed by three judges who are PhDs in the area, considering all scale items as very equivalent (CVI=1.0), and maintaining them in the pre-final version of the instrument. This was tested in a first group of caregivers for them to point out adjustments. The suggestions were accepted by modifying three items and, afterward, the scale was tested in a second group, which did not present difficulties answering the instrument. Conclusion: The Pearlin Mastery Scale was translated and culturally adapted for Brazil, showing equivalence. However, future psychometric analyses of the instrument are required to make it available for use in this population.

RESUMO O senso de domínio é conceituado como um aspecto positivo do cuidado voltado às pessoas que vivem com demência, um mecanismo de enfrentamento para reduzir a sobrecarga e que pode representar um fator protetor para a saúde mental e física do cuidador. Objetivo: Traduzir e adaptar culturalmente a Pearlin Mastery Scale para o Brasil. Métodos: Estudo metodológico conduzido na Universidade Federal de São Carlos, em que foram seguidas as etapas de tradução inicial; síntese; retrotradução; revisão pelo comitê de juízes pela análise do Índice de Validade de Conteúdo (IVC); e teste da versão pré-final. Resultados: Dois especialistas traduziram a escala para o português brasileiro e definiram uma versão consensual com os pesquisadores. Posteriormente, outros dois especialistas retrotraduziram a versão consensual, que foi revisada por três juízes doutores na área, considerando todos os itens da escala como muito equivalentes (IVC=1,0), mantendo-os na versão pré-final do instrumento. Esta foi testada em um primeiro grupo de cuidadores, a fim de se apontarem adequações. As sugestões foram acatadas mediante a modificação de três itens e, depois, a escala foi testada em um segundo grupo, o qual não apresentou dificuldades em responder ao instrumento. Conclusão: A Pearlin Mastery Scale foi traduzida e adaptada culturalmente para o Brasil, demonstrando equivalência. Entretanto, análises psicométricas futuras do instrumento são necessárias para disponibilizá-lo para uso entre essa população.

Efficacy of iSupport-Brasil for unpaid caregivers of people living with dementia: protocol for a randomized and controlled clinical trial.

Unpaid caregivers of people living with dementia tend to suffer mental health problems as a result of the negative effects associated with the care tasks. Thus, psychosocial interventions for this population group are necessary. iSupport is an online support program for caregivers that was created by the World Health Organization. Objective: To describe the design of a randomized clinical trial to measure the efficacy of the iSupport-Brasil version on caregivers' mental health and well-being. Methods: The participants will be randomized into Intervention Group (IG) (n=195) and Control Group (CG) (n=195). For three months, the IG will access the iSupport-Brasil platform, the CG will enter the electronic page of the Brazilian Alzheimer's Association, and both groups will be emailed the preliminary version of the "Guia de cuidados para a pessoa idosa" e-book (a guide to providing care to the elderly) from the Ministry of Health. The data will be collected at three moments: baseline, and three and six months after the beginning of the intervention. Results: It is expected that it will be possible to provide diverse validity evidence about iSupport-Brasil as an online and free intervention alternative, as a preventive means and as a way to promote mental health among caregivers of people living with dementia. Conclusion: Through the evaluation protocol of this randomized clinical trial on the effects of the iSupport-Brasil program, it may become a reference for countries that plan to adapt and improve the iSupport program using digital health solutions.

Cuidadores informais de pessoas que vivem com demência tendem a sofrer problemas de saúde mental como resultado dos efeitos negativos associados às tarefas de cuidado. Assim, intervenções psicossociais para essa população são necessárias. O iSupport é um programa de apoio online para cuidadores criado pela Organização Mundial da Saúde. Objetivo: Descrever o desenho de um ensaio clínico randomizado para medir a eficácia da versão iSupport-Brasil na saúde mental e no bem-estar de cuidadores. Métodos: Os participantes serão randomizados em Grupo Intervenção (GI) (n=195) e Grupo Controle (GC) (n=195). Durante três meses, o GI acessará a plataforma iSupport-Brasil, o CG entrará na página eletrônica da Associação Brasileira de Alzheimer e ambos os grupos receberão por e-mail a versão preliminar do e-book Guia de cuidados para a pessoa idosa, do Ministério da Saúde. Os dados serão coletados em três momentos: linha de base, três e seis meses após o início da intervenção. Resultados: Espera-se que seja possível fornecer diversas evidências sobre os efeitos do iSupport-Brasil como alternativa de intervenção online e gratuita, de forma a promover a saúde mental entre os cuidadores de pessoas que vivem com demência. Conclusão: O protocolo de avaliação deste ensaio clínico randomizado sobre os efeitos do programa iSupport-Brasil pode se tornar uma referência para os países que planejam adaptar e melhorar esta intervenção, usando soluções digitais de saúde.

A sobrecarga de cuidadores: como as características de idosos e seus cuidadores se articulam / The burden of caregivers: how the characteristics of the elderly and their caregivers articulate / La sobrecarga de los cuidadores: cómo se articulan las características de los ancianos y sus cuidadores

Objetivo: analisar a associação entre as características de idosos e cuidadores e seus impactos na sobrecarga dos cuidadores. Método: em 2021, foram avaliados 50 pares de cuidadores informais e idosos pelo perfil sociodemográfico, de saúde, Escala Hospitalar de Ansiedade e Depressão (HADS), Entrevista de Sobrecarga de Zarit-Brief (ZBI-12) e informações sobre grau de dependência dos idosos para atividades básicas e instrumentais (ABVD e AIVD). Modelos de regressão avaliaram os escores ZBI-12 e HADS em função das características dos cuidadores e idosos assistidos. O protocolo de pesquisa foi aprovado pelo Comitê de Ética em Pesquisa. Resultados: alta morbidade e dependência para ABVD foram significativamente associadas a maiores níveis de sobrecarga do cuidador. Essas características perderam significância quando ajustado o modelo por idade do cuidador, tempo que presta o cuidado e convivência com o idoso. Conclusão: esses resultados revelam a necessidade de intervenções para garantir suporte aos cuidadores quanto a diminuição da sobrecarga relacionada ao cuidado(AU)

Objective: to analyze the association between the characteristics of elderly people and caregivers and their impact on caregiver burden. Method: in 2021, 50 pairs of informal caregivers and their elderly were evaluated through the sociodemographic and health profile, Hospital Anxiety and Depression Scale (HADS), Zarit-Brief Burden Interview (ZBI-12), and information on the degree of dependence of the elderly for basic and instrumental activities (BADL and IADL). Regression models evaluated ZBI-12 and HADS scores as a function of characteristics of caregivers and assisted elderly. The research protocol was approved by the Research Ethics Committee. Results: high morbidity and BADL dependence were significantly associated with higher levels of caregiver burden. These characteristics lost significance when we adjusted the model for the caregiver's age, time that provides care, and living with the elderly. Conclusion: these results reveal the need for interventions to guarantee support for caregivers in terms of reducing the burden related to the care(AU)

Objetivo: analizar la asociación entre las características de ancianos y sus cuidadores y el correspondiente impacto en la sobrecarga de los cuidadores. Método: en 2021, se evaluaron 50 pares de cuidadores informales y sus ancianos a través del perfil sociodemográfico, de salud, Escala de Ansiedad y Depresión Hospitalaria (HADS), Escala de Zarit Reducida para la Sobrecarga (ZBI-12) e información sobre el grado de dependencia de los ancianos respecto a actividades básicas e instrumentales (ABVD y AIVD). Modelos de regresión evaluaron las puntuaciones de ZBI-12 y HADS en función de las características de los cuidadores y ancianos asistidos. El Comité de Ética en Investigación aprobó protocolo de investigación. Resultados: la alta morbilidad y la dependencia de BADL se asociaron significativamente con niveles más altos de sobrecarga del cuidador. Estas características perdieron su importancia cuando ajustamos el modelo por la edad del cuidador, tiempo que proporciona cuidados y convivencia con los ancianos. Conclusión: estos resultados revelan la necesidad de intervenciones para garantizar apoyo a los cuidadores para reducir la sobrecarga relacionada con el cuidado(AU)

Quantitative analysis of aflatoxin B1 of peanut by optimized support vector machine models based on near-infrared spectral features.

This study designs a chemometric framework for quantitatively evaluating aflatoxin B1 (AFB1) in peanuts based on near-infrared (NIR) spectroscopy technique. The NIR spectra of peanut samples exhibiting diverse fungal contamination levels were acquired using a portable NIR spectrometer. Subsequently, appropriate pre-processing techniques were employed for data refinement. To streamline the analysis, the iterative variable subset optimization (IVSO) technique was employed to conduct an initial screening of the pre-processed NIR spectra, eliminating numerous irrelevant variables. Building upon this screening process, the beluga whale optimization (BWO) algorithm was utilized to optimize the selected feature variables further. Subsequently, support vector machine (SVM) models were developed using the refined near-infrared spectral features to test AFB1 in peanuts quantitatively. The results indicate that the SVM model significantly improves detection performance and generalization proficiency, particularly after secondary optimization using BWO-IVSO. Among the different models considered, the SVM model established after BWO-IVSO optimization exhibited the most extraordinary level of generalization, with a root mean square error of prediction of 24.6322 µg∙kg-1, a correlation coefficient of 0.9761, and a relative percent deviation of 4.6999. Overall, this investigation highlights the effectiveness of the proposed NIR spectroscopy model based on BWO-IVSO-SVM for quantitatively analyzing AFB1 in peanuts. The study contributes valuable technical and methodological insights that can serve as a reference for rapidly determining mycotoxins in cereal crops.

Effects of exposure to sediment-associated fipronil on cardiac function of Neotropical armored catfish Hypostomus regani.

Fipronil is widely used as a broad-spectrum insecticide in agriculture, urban environments, and veterinary medicine. Fipronil can enter aquatic ecosystems and spread to sediment and organic matter, representing a risk to non-target species. This study aimed to evaluate the effects of short-term (96 h) exposure to a low and realistic concentration of sediment-associated fipronil (4.2 µg.kg-1 of Regent® 800 WG) on myocardial contractility of armored catfish Hypostomus regain, a benthic fish species. Fipronil exposure induced increased inotropism and acceleration of contractile kinetics, although no alterations in the relative ventricular mass were observed. This better cardiac function was associated with an elevated expression and/or function of the Na+/Ca2+ exchanger and its marked contribution to contraction and relaxation, probably due to a stress-induced adrenergic stimulation. Ventricle strips of exposed fish also exhibited a faster relaxation and a higher cardiac pumping capacity, indicating that armored catfish were able to perform cardiac adjustments to face the exposure. However, a high energetic cost to maintain an increased cardiac performance can make fish more susceptible to other stressors, impairing developmental processes and/or survival. These findings highlight the need for regulations of emerging contaminants, such as fipronil, to ensure adequate protection of the aquatic system.

iSupport-Brasil: Cross-cultural adaptation of the content included in the iSupport program for caregivers of people who have dementia.

OBJECTIVE: Examine the process of culturally adapting the content of the World Health Organization iSupport program for family caregivers of people living with dementia in Brazil. METHOD: This is a multicenter and methodological study to cross-culturally adapt the iSupport program. Initially, the content of the iSupport program was translated into Brazilian Portuguese by professional translator trained in Psychology, with mastery of the original language of the content (English). Focus groups were then held with caregivers/former caregivers of people who have dementia (n = 24) and health professionals specialized in aging (n = 24). The participants had access to part of the iSupport material for analysis purposes. Semi-structured interviews were conducted between June and September 2019. All the interviews were recorded and transcribed in full for subsequent analysis. All the ethical aspects were respected. RESULTS: The translator implemented some cross-cultural adaptations, such as substituting 69 proper names used in the original version by names of different Brazilian regions. In relation to the analysis of the material and comments from the focus groups, in general, all the participants had positive opinions about the material included in iSupport. Some changes were suggested in relation to the terminology and examples given in the modules to better fit the Brazilian culture and health systems, and links to relevant pages of the local Alzheimer's association were included. All the linguistic and cultural adaptations proposed were systematically documented and duly justified in structured forms provided by the World Health Organization, which approved all of them after verification of fidelity. CONCLUSION: The product of this research is the first version of the iSupport-Brasil program and the inclusion of its content in a digital platform. For the most part, the content offered in iSupport proved to be an important online tool to provide support and diverse information to the caregivers of people who have dementia.

A multi-biomarker approach to assess the sublethal effects of settleable atmospheric particulate matter from an industrial area on Nile tilapia (Oreochromis niloticus).

Iron and steel industries discharge a large amount of atmospheric particulate matter (PM) containing metals and metallic nanoparticles (NPs) that contaminate not only the air, but also settle into the aquatic environments. However, the effects of settleable atmospheric particulate matter (SePM) on aquatic fauna are still poorly understood. This study aimed to evaluate the sublethal effects of a short-term exposure to a realistic concentration of SePM on Nile tilapia (Oreochromis niloticus) using a multi-biomarker approach: relative ventricular mass (RVM) and heart function, blood oxidative stress, stress indicators, hemoglobin concentration, metallic NPs internalization, and metal bioaccumulation. Exposed fish exhibited reduced hemoglobin content and elevated plasma cortisol and glucose levels, reflecting stressed states. Furthermore, SePM caused blood oxidative stress increasing lipid and protein oxidation, decreasing glutathione levels, and inhibiting superoxide and glutathione reductase activities. SePM exposure also increased RVM and improved cardiac performance, increasing myocardial contractile force and rates of contraction and relaxation. In the heart tissue there was a significant accumulation of Fe > Zn > > Cr > Cu > Rb > Ni > V > Mn > Se > Mo > As. On the other hand, in the erythrocytes there was significant accumulation of Sn > Zn > > Cr > Ti > Mn = Ni > Nb > As > Bi. The highest bioaccumulation factors were found for Cr, Zn and Ni in both tissues. NPs (Ti, Sn, Al, Fe, Cu, Si, Zn) were also detected in ventricular myocardium of fish exposed and nanocrystallographic analysis revealed a predominance of anatase phase of TiO2-NP, which is regarded to be more cytotoxic. The association between blood oxidative stress and energy expenditure to sustain increased cardiac pumping capacity under stress condition suggests that SePM has negative impacts on fish physiological performance, threatening their survival, growth rate and/or population establishment.

Efficacy of iSupport-Brasil for unpaid caregivers of people living with dementia: protocol for a randomized and controlled clinical trial / Eficácia do iSupport-Brasil para cuidadores informais de pessoas que vivem com demência: protocolo de um ensaio clínico randomizado e controlado

ABSTRACT. Unpaid caregivers of people living with dementia tend to suffer mental health problems as a result of the negative effects associated with the care tasks. Thus, psychosocial interventions for this population group are necessary. iSupport is an online support program for caregivers that was created by the World Health Organization. Objective: To describe the design of a randomized clinical trial to measure the efficacy of the iSupport-Brasil version on caregivers' mental health and well-being. Methods: The participants will be randomized into Intervention Group (IG) (n=195) and Control Group (CG) (n=195). For three months, the IG will access the iSupport-Brasil platform, the CG will enter the electronic page of the Brazilian Alzheimer's Association, and both groups will be emailed the preliminary version of the "Guia de cuidados para a pessoa idosa" e-book (a guide to providing care to the elderly) from the Ministry of Health. The data will be collected at three moments: baseline, and three and six months after the beginning of the intervention. Results: It is expected that it will be possible to provide diverse validity evidence about iSupport-Brasil as an online and free intervention alternative, as a preventive means and as a way to promote mental health among caregivers of people living with dementia. Conclusion: Through the evaluation protocol of this randomized clinical trial on the effects of the iSupport-Brasil program, it may become a reference for countries that plan to adapt and improve the iSupport program using digital health solutions.

RESUMO. Cuidadores informais de pessoas que vivem com demência tendem a sofrer problemas de saúde mental como resultado dos efeitos negativos associados às tarefas de cuidado. Assim, intervenções psicossociais para essa população são necessárias. O iSupport é um programa de apoio online para cuidadores criado pela Organização Mundial da Saúde. Objetivo: Descrever o desenho de um ensaio clínico randomizado para medir a eficácia da versão iSupport-Brasil na saúde mental e no bem-estar de cuidadores. Métodos: Os participantes serão randomizados em Grupo Intervenção (GI) (n=195) e Grupo Controle (GC) (n=195). Durante três meses, o GI acessará a plataforma iSupport-Brasil, o CG entrará na página eletrônica da Associação Brasileira de Alzheimer e ambos os grupos receberão por e-mail a versão preliminar do e-book Guia de cuidados para a pessoa idosa, do Ministério da Saúde. Os dados serão coletados em três momentos: linha de base, três e seis meses após o início da intervenção. Resultados: Espera-se que seja possível fornecer diversas evidências sobre os efeitos do iSupport-Brasil como alternativa de intervenção online e gratuita, de forma a promover a saúde mental entre os cuidadores de pessoas que vivem com demência. Conclusão: O protocolo de avaliação deste ensaio clínico randomizado sobre os efeitos do programa iSupport-Brasil pode se tornar uma referência para os países que planejam adaptar e melhorar esta intervenção, usando soluções digitais de saúde.

Impacts of the COVID-19 pandemic on the mother owl program of the VII health region of Pernambuco / Impactos da pandemia da COVID-19 no programa mãe coruja da VII região de saúde de Pernambuco

Resumo Objectives: to analyze the impacts caused by the COVID-19 pandemic on the Mother Owl Program of the VII Health Region of Pernambuco. Methods: descriptive, cross-sectional and quantitative study, carried out at the VII Regional Health Management, in Salgueiro-PE. Data were collected from the Mother Owl Information System, from August to November 2021, being related to women and children registered from 2019 to March 2021. Adopting a time frame for before and during the pandemic, the Student's t and chi-square tests in the analysis of continuous and categorical variables, respectively. Results: data from 581 women and 412 children were analyzed. Before the pandemic, there was a higher average number of prenatal consultations (p<0.001) and greater completeness in the children's race data (p<0.001). During the pandemic, there was a lower frequency of breastfeeding in the first hour of life (p<0.001) and of filling in the data regarding maternal education (p<0.001). In addition, no more than 7 childcare consultations were performed (p<0.001). Conclusions: the assistance of women and children was impacted, mainly with the drop in prenatal and childcare consultations, showing that COVID-19 had a negative impact on the health of people monitored by the Program and on the quality of information inserted in the system.

Resumo Objetivos: analisar os impactos causados pela pandemia da COVID-19 no Programa Mãe Coruja da VII Região de Saúde de Pernambuco. Métodos: estudo descritivo, transversal e quantitativo, realizado na VII Gerência Regional de Saúde, em Salgueiro-PE. Os dados foram coletados do Sistema de Informação Mãe Coruja, no período de agosto a novembro de 2021, sendo relacionados às mulheres e crianças cadastradas de 2019 a março de 2021. Adotando-se um marco temporal para antes e durante a pandemia, foram utilizados os testes t de Student e qui-quadrado nas análises das variáveis contínuas e categóricas, respectivamente. Resultados: foram analisados os dados de 581 mulheres e 412 crianças. Antes da pandemia constatou-se maior média de consultas de pré-natal (p<0,001) e maior completude nos dados de raça das crianças (p<0,001). Durante a pandemia ocorreu menor frequência da amamentação na primeira hora de vida (p<0,001) e do preenchimento dos dados referentes à escolaridade materna (p<0,001). Assim como, não foram realizadas mais que sete consultas de puericultura (p<0,001). Conclusões: a assistência das mulheres e crianças foi impactada, principalmente com a queda de consultas do pré-natal e da puericultura, evidenciando que a COVID-19 repercutiu negativamente na saúde das pessoas acompanhadas pelo Programa e na qualidade das informações inseridas no sistema.

Factors associated with symptoms of physical and emotional burden in informal caregivers of the elderly.

OBJECTIVES: to analyze the personal and work-related burden factors associated with physical and emotional symptoms of informal caregivers of the elderly. METHODS: cross-sectional study conducted with 121 informal caregivers and 121 seniors who received care, assessed individually for the risk of: physical overload, musculoskeletal symptoms, Self-Reporting Questionnaire, effort perception, and Katz index. RESULTS: a greater perception of effort raises up to 3.3 times the chances of presenting symptoms of pain in the spine region (p=0.01), and lower functional capacity of the elderly increases up to 1.3 times the chances of presenting pain symptoms in the spine region (p=0.02). The symptoms of emotional overload were associated with the caregiver's low income (p=0.02). CONCLUSIONS: the perception of effort, dependence of the elderly, caregiver's age, and symptoms of emotional overload are involved with caregivers' symptoms of physical overload, and low income, with emotional overload.

Complementarity of neutron, XFEL and synchrotron crystallography for defining the structures of metalloenzymes at room temperature.

Room-temperature macromolecular crystallography allows protein structures to be determined under close-to-physiological conditions, permits dynamic freedom in protein motions and enables time-resolved studies. In the case of metalloenzymes that are highly sensitive to radiation damage, such room-temperature experiments can present challenges, including increased rates of X-ray reduction of metal centres and site-specific radiation-damage artefacts, as well as in devising appropriate sample-delivery and data-collection methods. It can also be problematic to compare structures measured using different crystal sizes and light sources. In this study, structures of a multifunctional globin, dehaloperoxidase B (DHP-B), obtained using several methods of room-temperature crystallographic structure determination are described and compared. Here, data were measured from large single crystals and multiple microcrystals using neutrons, X-ray free-electron laser pulses, monochromatic synchrotron radiation and polychromatic (Laue) radiation light sources. These approaches span a range of 18 orders of magnitude in measurement time per diffraction pattern and four orders of magnitude in crystal volume. The first room-temperature neutron structures of DHP-B are also presented, allowing the explicit identification of the hydrogen positions. The neutron data proved to be complementary to the serial femtosecond crystallography data, with both methods providing structures free of the effects of X-ray radiation damage when compared with standard cryo-crystallography. Comparison of these room-temperature methods demonstrated the large differences in sample requirements, data-collection time and the potential for radiation damage between them. With regard to the structure and function of DHP-B, despite the results being partly limited by differences in the underlying structures, new information was gained on the protonation states of active-site residues which may guide future studies of DHP-B.

Cultural factors associated with burden in unpaid caregivers of older adults: A systematic review.

The aim of the present systematic review was to investigate cultural factors associated with burden in unpaid caregivers of older adults. Searches were conducted in the Pubmed, Web of Science, PsycInfo, Scopus, Embase, LILACs and SciELO databases for relevant articles published in English, Portuguese and Spanish using the search terms 'Caregiver AND Culture AND (Burnout OR Caregiver Burden) AND Aged'. No restriction was imposed regarding year of publication. A total of 1234 articles were identified, 34 of which were selected for the present review. The following sociodemographic characteristics were associated with burden: being female, married, White caregivers, young and the spouse of the care recipient; having no siblings; having low schooling and low economic status. Cultural factors associated with burden were living with the care recipient, not professing a religion or having little spirituality, familism (i.e. less reciprocity) and an absence of social support. The present findings underscore the importance of developing intervention strategies that consider cultural factors to minimise the negative impacts of care on unpaid caregivers of older adults.

ISupport-Brasil: Preliminary results of the usability and acceptability assessment by caregivers of people who have dementia.

Objective: To assess usability and acceptability of iSupport-Brasil (iSupport-BR) to virtually support family caregivers of people who have dementia. Materials and methods: In the first stage, nine caregivers/former caregivers assessed the interface of the platform that hosts iSupport-BR. In the second stage, 10 caregivers assessed acceptability of the platform and answered the System Usability Scale (SUS), which varies from 0 to 100 points. A descriptive analysis of the quantitative data was performed, as well as a thematic analysis on the open questions. All the ethical aspects were respected. Results: The results of the first stage indicated a user-friendly interface of the system and relevant content of the program, with 55.6 and 77.8% of the participants assigning the maximum grade to these questions, respectively. Of the five possible points, the system's mean score was 3.7. In Stage 2, 80% of the caregivers rated the program as very useful and 100% would recommend it to other caregivers. Perception of the program's usability by the SUS scale was excellent (M = 86.5 ± 11.5). Conclusion: This research allowed elaborating the final version of iSupport-BR, considering usability and acceptability of the platform and the program for computers/notebooks, being a pioneer in evaluating it for use in smartphones. Future research studies will have to assess the effects of iSupport-BR on the caregivers' mental health.

Megahertz pulse trains enable multi-hit serial femtosecond crystallography experiments at X-ray free electron lasers.

The European X-ray Free Electron Laser (XFEL) and Linac Coherent Light Source (LCLS) II are extremely intense sources of X-rays capable of generating Serial Femtosecond Crystallography (SFX) data at megahertz (MHz) repetition rates. Previous work has shown that it is possible to use consecutive X-ray pulses to collect diffraction patterns from individual crystals. Here, we exploit the MHz pulse structure of the European XFEL to obtain two complete datasets from the same lysozyme crystal, first hit and the second hit, before it exits the beam. The two datasets, separated by <1 µs, yield up to 2.1 Å resolution structures. Comparisons between the two structures reveal no indications of radiation damage or significant changes within the active site, consistent with the calculated dose estimates. This demonstrates MHz SFX can be used as a tool for tracking sub-microsecond structural changes in individual single crystals, a technique we refer to as multi-hit SFX.