The activity of the ribonucleotide monophosphatase UmpH is controlled by interaction with the GlnK signaling protein in Escherichia coli.

The PII signaling proteins are ubiquitous in prokaryotes serving as crucial metabolic hubs in different metabolic pathways due to their ability to sense and integrate signals of the cellular nitrogen, carbon, and energy levels. In this study we used ligand fishing assays to identify the ribonucleotide monophosphatase UmpH enzyme as a novel target of the PII signaling protein GlnK in Escherichia coli. In vitro analyses showed that UmpH interacts specifically with the PII protein GlnK but not with its paralogue protein GlnB. The UmpH - GlnK complex is modulated by the GlnK uridylylation status and by the levels of the GlnK allosteric effectors ATP, ADP and 2-oxoglutarate. Upon engaging interaction with GlnK, UmpH becomes less active towards its substrate uridine 5'-monophosphate (UMP). We suggest a model where GlnK will physically interact to reduce the UmpH activity during the transition from N-starvation to N-sufficient conditions. Such a mechanism may help the cells to reprogram the fate of UMP from catabolism to anabolism avoiding futile cycling of key nutrients.

Ultrafast and high-throughput immunoassay assay to detect anti-SARS-CoV-2 IgG antibodies in dogs and cats.

The fact that SARS-CoV-2 has reportedly infected companion, livestock and wildlife animals may constitute a significant risk for virus reservoirs, ground for emerging variants and potential for novel reverse zoonosis. Hence, SARS-CoV-2 surveillance in animal species is crucial to prevent emerging variants which may spread to humans. The present study aimed to develop a simple, high-throughput and ultrafast magnetic bead immunoassay to detect anti-SARS-CoV-2 nucleocapsid and spike reactive IgG antibodies in dog and cat serum samples. The assays were validated using serum from eleven dogs and cats which had SARS-CoV-2 infections confirmed by real-time RT-PCR. The negative cohort consisted of pre-pandemic dog and cat samples. The assays performed at 73-82% sensitivity and 97.5-98% specificity for dogs and 71% sensitivity and 92-94% specificity for cats. The lower assay specificity for cats is explained by the fact that cat pre-pandemic sera showed high levels of cross-reactive with SARS-CoV-2 Nucleocapsid and Spike, supporting that these animals have been exposed to other coronavirus sharing structural similarities with SARS-CoV-2. These assays described in this work are now being used for SARS-CoV-2 surveillance and research purposes.

Exploring the recovery journey of COVID-19 critical care survivors during the first year after hospital discharge.

Objectives: To explore the longitudinal recovery of patients admitted to critical care following COVID-19 over the year following hospital discharge. To understand the important aspects of the patients' recovery process and key elements of their caregivers' experiences during this time. Design: A longitudinal qualitative study using semi-structured interviews. Setting: Two acute hospitals in South East England and follow-up in the community. Participants: Six COVID-19 critical care survivors from the first wave of the pandemic (March-May 2020) and five relatives were interviewed 3 months after hospital discharge. The same six survivors and one relative were interviewed again at 1 year. Interviews were transcribed verbatim, anonymised and a reflexive thematic analysis was conducted. Results: Three themes were developed: (1) 'The cycle of guilt, fear and stigma'; (2) 'Facing the uncertainties of recovery' and (3) 'Coping with lingering symptoms - the new norm'. The first theme highlights survivors' reluctance to share their experiences associated with contracting the disease. The second theme, explores challenges faced by the survivors and their relatives in navigating the recovery process, given the unknown nature of the illness. The final theme illustrates the mechanisms survivors develop to come to terms with the remnants of their illness and critical care stay. Conclusions: The longitudinal nature of the study highlighted the persisting symptoms of long COVID-19, their impact on survivors and coping methods amidst the ongoing pandemic. Further research into the experiences of those affected in the first and subsequent waves of the COVID-19 pandemic, is desirable to help guide the formulation of the optimally supported recovery pathways.

Gastrointestinal Manifestations of Chagas Disease: A Systematic Review with Meta-Analysis.

The aims of this study were to estimate the prevalence of gastrointestinal manifestations among individuals with positive serology for Chagas disease (ChD) and to describe the clinical gastrointestinal manifestations of the disease. A systematic review with meta-analysis was conducted based on the criteria and recommendations of the Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidelines. The PubMed, Scopus, Virtual Health Library, Web of Science, and Embase databases were used to search for evidence. Two reviewers independently selected eligible articles and extracted data. RStudio® software was used for the meta-analysis. For subgroup analysis, the studies were divided according to the origin of the individuals included: 1) individuals from health units were included in the health care service prevalence analysis, and 2) individuals from the general population were included in the population prevalence analysis. A total of 2,570 articles were identified, but after removal of duplicates and application of inclusion criteria, 24 articles were included and 21 were part of the meta-analysis. Most of the studies were conducted in Brazil. Radiological diagnosis was the most frequent method used to identify the gastrointestinal clinical form. The combined effect of meta-analysis studies showed a prevalence of gastrointestinal manifestations in individuals with ChD of 12% (95% CI, 8.0-17.0%). In subgroup analysis, the prevalence for studies involving health care services was 16% (95% CI, 11.0-23.0%), while the prevalence for population-based studies was 9% (95% CI, 5.0-15.0%). Megaesophagus and megacolon were the main forms of ChD presentation in the gastrointestinal form. The prevalence of gastrointestinal manifestations of ChD was 12%. Knowing the prevalence of ChD in its gastrointestinal form is an important step in planning health actions for these patients.

High seroprevalence for SARS-CoV-2 infection in dogs: Age as risk factor for infection in shelter and foster home animals.

SARS-CoV-2 has caused 775 outbreaks in 29 animal species across 36 countries, including dogs, cats, ferrets, minks, non-human primates, white-tailed deer, and lions. Although transmission from owners to dogs has been extensively described, no study to date has also compared sheltered, foster home and owner dogs and associated risk factors. This study aimed to identify SARS-CoV-2 infection and anti-SARS-CoV-2 antibodies from sheltered, fostered, and owned dogs, associated with environmental and management risk factors. Serum samples and swabs were collected from each dog, and an epidemiological questionnaire was completed by the shelter manager, foster care, and owner. A total of 111 dogs, including 222 oropharyngeal and rectal swabs, tested negative by RT-qPCR. Overall, 18/89 (20.22%) dogs presented IgG antibodies against the N protein of SARS-CoV-2 by magnetic ELISA, while none showed a reaction to the Spike protein. SARS-CoV-2 antibodies showed an age-related association, with 4.16 chance of positivity in adult dogs when compared with young ones. High population density among dogs and humans, coupled with repeated COVID-19 exposure, emerged as potential risk factors in canine virus epidemiology. Dogs exhibited higher seropositivity rates in these contexts. Thus, we propose expanded seroepidemiological and molecular studies across species and scenarios, including shelter dogs.

Surviving severe COVID-19: Interviews with patients, informal carers and health professionals.

BACKGROUND: The COVID-19 pandemic has been associated with an unprecedented number of critical care survivors. Their experiences through illness and recovery are likely to be complex, but little is known about how best to support them. AIM: This study aimed to explore experiences of illness and recovery from the perspective of survivors, their relatives and professionals involved in their care. STUDY DESIGN: In-depth qualitative interviews were conducted with three stakeholder groups during the first wave of the pandemic. A total of 23 participants (12 professionals, 6 survivors and 5 relatives) were recruited from 5 acute hospitals in England and interviewed by telephone or video call. Data analysis followed the principles of Reflexive Thematic Analysis. FINDINGS: Three themes were generated from their interview data: (1) Deteriorating fast-a downhill journey from symptom onset to critical care; (2) Facing a new virus in a hospital-a remote place; and (3) Returning home as a survivor, maintaining normality and recovering slowly. CONCLUSIONS: Our findings highlight challenges in accessing care and communication between patients, hospital staff and relatives. Following hospital discharge, patients adopted a reframed 'survivor identity' to cope with their experience of illness and slow recovery process. The concept of survivorship in this patient group may be beneficial to promote and explore further. RELEVANCE TO CLINICAL PRACTICE: All efforts should be made to continue to improve communication between patients, relatives and health professionals during critical care admissions, particularly while hospital visits are restricted. Adapting to life after critical illness may be more challenging while health services are restricted by the impacts of the pandemic. It may be beneficial to promote the concept of survivorship, following admission to critical care due to severe COVID-19.

Avaliação econômica de uma estratégia individual de empoderamento farmacoterapêutico: um modelo em longo prazo aplicado do diabetes mellitus tipo II / Economic evaluation of an individual pharmacotherapeutic empowerment strategy: an applied long-term model for type II diabetes mellitus

Objetivos: contribuir para a geração de dados de avaliação econômica de estratégias de empoderamento farmacoterapêutico para pacientes com Diabetes Mellitus tipo 2 (DM tipo 2). Métodos: este estudo farmacoeconômico é aninhado a um ensaio clínico com controle não randomizado que incluiu pacientes ≥18 anos de idade, cadastrados no HIPERDIA. Os pacientes foram alocados em um modelo de Markov conforme valores de hemoglobina glicada do acompanhamento. As probabilidades do surgimento de complicações relativas ao DM, incluindo-se óbito, foram estimadas por dez anos. Cada complicação do DM tipo 2 teve seu custo estabelecido para determinação do custo anual. Resultados: entre os participantes da intervenção, não ocorrem óbitos ocasionados por DM tipo 2, e a progressão de complicações mantém-se estável durante os anos simulados, enquanto, no grupo controle, 60% dos pacientes podem evoluir para óbito nos dez anos, e a probabilidade de serem acometidos por complicações relacionadas ao DM tipo 2 é crescente. Com relação aos custos, ao final de dez anos, os pacientes que participaram da Estratégia Individual de Empoderamento Farmacoterapêutico (EIEF) tiveram um custo médio de UU$134,45 poupando a vida de 100% dos pacientes, e os pacientes do atendimento convencional um custo médio de UU$237,12 e 40% dos pacientes acompanhados chegariam ao final do ciclo com vida. Conclusão: a EIEF parece ser uma alternativa economicamente viável em longo prazo, bem como para a promoção do controle glicêmico.

Objectives: contribute to the data generation for the economic evaluation of pharmacotherapeutic empowerment strategies for type 2 diabetes mellitus patients (type 2 DM). Method: This pharmacoeconomic study is nested in a clinical trial with non-randomized control that included patients ≥18 years old, registered in HIPERDIA. The patients were allocated to a Markov model according to the follow-up glycated hemoglobin values. The probabilities of the appearance of complications related to DM, including death, have been estimated for ten years. Each complication of type 2 DM had its cost established to determine the annual cost. Results: Among the participants in the intervention, there are no deaths caused by type 2 DM, and the progression of complications remains stable during the simulated years, whereas in the control group, 60% of the patients can progress to death in ten years and the probability of being affected by complications related to type 2 DM is increasing. Regarding costs, at the end of ten years, patients who participated in Individual Pharmacotherapeutic Empowerment Strategy (IPES) had an average cost of US$ 134.45, saving 100% of patient's lives, and conventional care patients cost an average of US$ 237.12 and 40% of the patients followed would reach the end of the life cycle. Conclusion: The IPES seems like an economically viable and long-term economic alternative and promotes glycemic control.

Is pinking susceptibility index a good predictor of white wines pinking phenomena?

The concentration of anthocyanins in white wines from different grape varieties (Prosecco, Sauvignon Blanc, Pinot Grey, Chardonnay, Síria) from diverse countries (Italy, Moldova, and Portugal) was determined. Anthocyanins, mainly malvidin-3-O-glucoside, were detected in all wines (from 0.7 to 704 µg/L). No correlation between anthocyanins concentration and the Pinking Susceptibility Index (PSI) was observed contrarily to the colour of wines exposed to oxygen (r = 0.871, p < 0.00005). The oxidation of wines with hydrogen peroxide resulted in the formation of various compounds. PSI was correlated with compounds absorbing in the 400-480 nm region, probably more related to the browning than the pinking phenomenon. The lack of correlation between the PSI and anthocyanins concentration in white wines can be due to the different chemical compositions of white wines that yield various compounds after oxidation that might not be related to the natural wine pinking phenomenon.

Using Smartwatches to Observe Changes in Activity During Recovery From Critical Illness Following COVID-19 Critical Care Admission: 1-Year, Multicenter Observational Study.

BACKGROUND: As a sequela of the COVID-19 pandemic, a large cohort of critical illness survivors have had to recover in the context of ongoing societal restrictions. OBJECTIVE: We aimed to use smartwatches (Fitbit Charge 3; Fitbit LLC) to assess changes in the step counts and heart rates of critical care survivors following hospital admission with COVID-19, use these devices within a remote multidisciplinary team (MDT) setting to support patient recovery, and report on our experiences with this. METHODS: We conducted a prospective, multicenter observational trial in 8 UK critical care units. A total of 50 participants with moderate or severe lung injury resulting from confirmed COVID-19 were recruited at discharge from critical care and given a smartwatch (Fitbit Charge 3) between April and June 2020. The data collected included step counts and daily resting heart rates. A subgroup of the overall cohort at one site-the MDT site (n=19)-had their smartwatch data used to inform a regular MDT meeting. A patient feedback questionnaire and direct feedback from the MDT were used to report our experience. Participants who did not upload smartwatch data were excluded from analysis. RESULTS: Of the 50 participants recruited, 35 (70%) used and uploaded data from their smartwatch during the 1-year period. At the MDT site, 74% (14/19) of smartwatch users uploaded smartwatch data, whereas 68% (21/31) of smartwatch users at the control sites uploaded smartwatch data. For the overall cohort, we recorded an increase in mean step count from 4359 (SD 3488) steps per day in the first month following discharge to 7914 (SD 4146) steps per day at 1 year (P=.003). The mean resting heart rate decreased from 79 (SD 7) beats per minute in the first month to 69 (SD 4) beats per minute at 1 year following discharge (P<.001). The MDT subgroup's mean step count increased more than that of the control group (176% increase vs 42% increase, respectively; +5474 steps vs +2181 steps, respectively; P=.04) over 1 year. Further, 71% (10/14) of smartwatch users at the MDT site and 48% (10/21) of those at the control sites strongly agreed that their Fitbit motivated them to recover, and 86% (12/14) and 48% (10/21), respectively, strongly agreed that they aimed to increase their activity levels over time. CONCLUSIONS: This is the first study to use smartwatch data to report on the 1-year recovery of patients who survived a COVID-19 critical illness. This is also the first study to report on smartwatch use within a post-critical care MDT. Future work could explore the role of smartwatches as part of a randomized controlled trial to assess clinical and economic effectiveness. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): RR2-10.12968/ijtr.2020.0102.

Thymus hirtus Willd. ssp. algeriensis Boiss. and Reut: A Comprehensive Review on Phytochemistry, Bioactivities, and Health-Enhancing Effects.

Members of the Lamiaceae family are considered chief sources of bioactive therapeutic agents. They are important ornamental, medicinal, and aromatic plants, many of which are used in traditional and modern medicine and in the food, cosmetic, and pharmaceutical industries. In North Africa, on the Mediterranean side, there is the following particularly interesting Lamiaceous species: Thymus hirtus Willd. sp. Algeriensis Boiss. Et Reut. The populations of this endemic plant are distributed from the subhumid to the lower arid zone and are mainly employed as ethnomedicinal remedies in the following Maghreb countries: Algeria, Libya, Morocco, and Tunisia. In fact, they have been applied as antimicrobial agents, antispasmodics, astringents, expectorants, and preservatives for several food products. The species is commonly consumed as a tea or infusion and is used against hypercholesterolemia, diabetes, respiratory ailments, heart disease, and food poisoning. These medicinal uses are related to constituents with many biological characteristics, including antimicrobial, antioxidant, anticancer, anti-ulcer, anti-diabetic, insecticidal, and anti-inflammatory activities. This review aims to present an overview of the botanical characteristics and geographical distribution of Thymus algeriensis Boiss. Et Reut and its traditional uses. This manuscript also examines the phytochemical profile and its correlation with biological activities revealed by in vitro and in vivo studies.

Infiltração de anestésicos locais na ferida cirúrgica: efeito sobre a inflamação e cicatriz fibrosa em ratos / Infiltration of local anesthetics into the surgical wound: effect on inflammation and fibrous scar in rats

■ RESUMO Introdução: O alívio da dor após a cirurgia continua sendo um dos desafios médicos mais significativos, principalmente na cirurgia estética. A infiltração da incisão cirúrgica com anestésicos locais tem sido cada vez mais utilizada para reduzir a dor e o uso de analgésicos. No entanto, pouco se sabe sobre o efeito desta injeção na cicatrização. O objetivo é avaliar a interferência dos anestésicos locais na área de infiltrado inflamatório e cicatriz de fibrose em ratos. Métodos: Duas incisões lineares foram feitas cada uma na região dorsal de 40 ratos Wistar. A incisão esquerda foi infiltrada com doses de 1,8ml de bupivacaína, levobupivacaína, ropivacaína ou solução salina 0,9%. A incisão direita não recebeu infiltração, servindo como grupo controle. Após sete dias, amostras das incisões foram coletadas para avaliação morfométrica histológica. Resultados: Quando comparada com os grupos controle, a área de infiltrado inflamatório encontrada foi maior nos grupos bupivacaína, ropivacaína e levobupivacaína. O grupo bupivacaína apresentou um infiltrado inflamatório maior do que a levobupivacaína e a ropivacaína. A área da cicatriz fibrosa foi maior nos grupos levobupivacaína e ropivacaína. Não houve diferença entre os grupos que receberam anestésico e solução salina. Conclusão: Como não houve diferença entre os grupos de anestésico e soro fisiológico, o volume aplicado ou o trauma podem ter sido a causa das maiores áreas de infiltração e cicatriz associadas à aplicação dos anestésicos locais.

■ ABSTRACT Introduction: Pain relief after surgery remains one of the most significant medical challenges, mainly in aesthetic surgery. The infiltration of the surgical incision with local anesthetics has been increasingly used to reduce pain and other analgesic use. However, little is known about the effect of this injection on healing. The objective is to evaluate the interference of local anesthetics in the area of inflammatory infiltrate and fibrosis scar in rats. Methods: Two linear incisions each were made on the dorsal region of 40 Wistar rats. The left incision was infiltrated with doses of 1.8ml of bupivacaine, levobupivacaine, ropivacaine, or 0,9% saline solution infiltration. The right incision did not receive infiltration, serving as a control group. After seven days, samples of the incisions were collected for histological morphometric evaluation. Results: When compared with the control groups, the area of inflammatory infiltrate was found larger in the bupivacaine, ropivacaine, and levobupivacaine groups. The bupivacaine group presented a larger inflammatory infiltrate than the levobupivacaine and ropivacaine. The fibrous scar area was larger in the levobupivacaine and ropivacaine groups. There was no difference between the groups that received anesthetic and saline solution. Conclusion: As there was no difference between the anesthetics and saline solution groups, the volume applied, or the trauma may have been the cause of the larger areas of infiltrating and scar associated with local anesthetics application.

Perfil do usuário do Sistema Único de Saúde no município de Curitiba, Paraná, com necessidade de tratamento odontológico / Profile of Unified National Health System' users, requiring specialized dental treatment, in Curitiba, Paraná

Objetivo: Delinear o perfil de usuários que aguardam na lista de espera pelo atendimento odontológico especializado em Endodontia em dois Centros de Especialidades Odontológicas (CEO) do município de Curitiba, Paraná. Métodos. Neste estudo transversal foram coletados e classificados dados de 7072 usuários conforme gênero, idade, Distrito Sanitário (DS) em que o atendimento básico foi prestado e data de entrada na lista de espera. Os dados foram submetidos aos testes Qui-quadrado para independência, seguidos do teste de acompanhamento de resíduos ajustados de Marascuilo. Resultados: Dos usuários pesquisados que aguardavam, 63,0% eram mulheres. A faixa etária prevalente foi de 15 a 34 anos (p<0,05). Diferença estatisticamente significativa foi encontrada quanto aos atendimentos nos DS (p<0,05). O DS Matriz teve a menor frequência de inclusão na lista de espera em comparação com os demais; já os DS Bairro Novo (13,5%), Cidade Industrial de Curitiba (13,7%), Boa Vista (14,5%), Boqueirão (14,8%) e Pinheirinho (15,2%) apresentaram as maiores frequências. Por fim, em relação aos atendimentos na série temporal, diferença significativa entre os meses foi identificada (p<0,01). Conclusão: O perfil dos usuários encontrados na lista de espera para atendimento endodôntico em Curitiba, no período analisado, conta com maior prevalência de mulheres, de indivíduos entre 15 a 34 anos, distribuídos de maneira desigual dentre os DS e meses do ano, sendo este último dado resultante de ações da Secretaria Municipal de Saúde.

Objective: The aim of this study was to delineate the profile of users in the waiting list for specialized endodontic dental care in two Dental Specialty Centers (DSC) of the city of Curitiba, Paraná. Methods: In this cross-sectional study, data from 7,072 users were collected and classified according to gender, age, Sanitary District (SD), and date of entry in the waiting list. Data were submitted to Chi-square tests for independence, followed by Marascuilo's adjusted residuals test. Results: Of the users on the waiting list surveyed, 63.0% were women. The prevalent age group was 15- to 34 years (p<0.05). Statistical difference was found regarding attendance at the SD (p<0.05). The SD Matriz had the lowest frequency of inclusion in the waiting list compared to the others; SD Bairro Novo (13.5%), Cidade Industrial de Curitiba (13.7%), Boa Vista (14.5%), Boqueirão (14.8%) and Pinheirinho (15.2%) presented the highest frequencies. Finally, regarding the time series attendances, a significant difference between the months was identified (p <0.01). Conclusion: The profile of users found in the waiting list for endodontic care in Curitiba, during the analyzed period, has a higher prevalence of women, between 15 and 34 years old, and unequally distributed among the SD and months of the year, the latter being the result of actions of the Municipal Health Office.

Physical activity for people living with dementia: carer outcomes and side effects from the perspectives of professionals and family carers.

BACKGROUND: Adherence to physical activity is challenging for people living with dementia, and largely dependent on carers' involvement. Carers are likely to support physical activity based on their perceived balance between benefits and potential side effects of such intervention for both patients and themselves. Professionals also have a role in terms of optimising such interventions not only for people with dementia but also their carers. AIMS: The present study aimed to identify the priorities of carers and professionals regarding (1) outcomes of physical activity for people living with dementia on carers and (2) side effects on patients and carers. METHODS: This was a two-round prioritisation exercise. In round one, participants were asked to rank, from most to least important, 2 lists of outcomes generated in a previous systematic review and qualitative study: (i) 10 outcomes on carers; (ii) 17 side effects on patients and carers. In round two, participants were asked to consider their own ranking in round one against the overall group ranking and re-rank both lists. RESULTS: 36 carers and 39 professionals completed both rounds. The carer outcomes ranked as highest priority were "carer feeling positive and satisfied", "carer improving wellbeing" and "making lives of carers easier". The most undesirable side effects were "becoming agitated and confused", "falling over" and "feeling discomfort and pain". DISCUSSION AND CONCLUSIONS: Carers and professionals value the potential reduction in carer burden that may occur as a consequence of the person with dementia engaging in physical activity. Behavioural and psychological symptoms, falls and pain are the most undesirable side effects of physical activity. Future research should aim to address, and consistently report on these outcomes.

Environmental Awareness for Patients with COPD Undergoing Pulmonary Rehabilitation: Is It of Added Value?

Chronic obstructive pulmonary disease (COPD) is impacted by exposure to environmental contaminants. Improving health literacy on this topic might help to optimize health outcomes. We aimed to design and deliver a health-education session about the impact of environmental contaminants on respiratory symptoms and explore participants' perceptions on such session. Patients with COPD were recruited from a pulmonary rehabilitation (PR) program. Two focus groups were first conducted to explore knowledge amongst the group. Then, the session was designed and delivered, and three focus groups were conducted to obtain feedback from participants. Data were analyzed thematically by two independent researchers. Thirty-one patients (71 ± 8 years old, FEV1 = 47.6 ± 16.8% predicted; 74.2% male) were included. Prior to the session, participants recognized the importance of this topic and described avoidance strategies to deal with symptom triggering due to air pollution. After the session, participants had their knowledge validated, kept some avoidance strategies, but also adapted some "unavoidable" activities of daily living. Patients with COPD value education on this topic, and PR offers a friendly environment to discuss prevention and management strategies. Contents of the session are provided to help deliver these sessions. Future studies could investigate the effectiveness of this intervention on self-management and exacerbations of COPD.

Multitarget protection of Pterospartum tridentatum phenolic-rich extracts against a wide range of free radical species, antidiabetic activity and effects on human colon carcinoma (Caco-2) cells.

Pterospartum tridentatum is an edible endemic plant common in Portugal. Its flowers are used in culinary and are part of the popular medicine owing to its therapeutic properties. In this study, P. tridentatum flower infusion and hydroethanolic extracts were characterized concerning their phenolic composition and biological potential. By high-performance liquid chromatography method coupled to a diode array detector analysis were detected 13 phenolics. Genistein was the major one. Concerning the biological potential, the hydroethanolic extract was the most active against 2,2-diphenyl-1-picrylhydrazyl● and also as α-glucosidase inhibitor, while the infusion proved to be a remarkable free radical scavenger. Concerning human epithelial colorectal adenocarcinoma (Caco-2) cells, it was observed that both extracts displayed dose-dependent cytotoxicity on the viability of Caco-2 cells, presenting cytotoxic selectivity for these cancer cells when compared to the NHDF normal cell line. Additionally, they also showed protective effects against oxidative stress induced by tert-butyl hydroperoxide on Caco-2 cells. The obtained results suggest that these extracts may be interesting to enrich nutraceutical, pharmaceutical and food industries; however, more studies need to be done for their inclusion in pharmaceutical preparations and/or food additives. PRACTICAL APPLICATION: Pterospartum tridentatum is an endemic plant commonly used in folk medicine due to its depurative and hypoglycaemic properties. For this reason, we decided to determine the phenolic content of infusion and hydroethanolic extracts of P. tridentatum and their biological potential. The obtained results proved that P. tridentatum extracts are a rich source of bioactive compounds and possess great antioxidant and antidiabetic activities, ability to protect human erythrocytes against oxidative damage, inhibiting hemolysis, hemoglobin oxidation, and lipid peroxidation, and to interfere with Caco-2 cells growth and to protect these cells when subject to tert-butyl hydroperoxide oxidative stress conditions.

Evaluating the validity of dengue clinical-epidemiological criteria for diagnosis in patients residing in a Brazilian endemic area.

BACKGROUND: We evaluated the validity of clinical diagnosis compared with laboratory diagnosis of dengue in a retrospective sample of patients in São José do Rio Preto, Brazil. METHODS: Our sample included 148 299 clinically (56.3%) or laboratory-diagnosed (43.7%) dengue cases. We compared the sensitivity, specificity, positive and negative predictive value (PPV and NPV) of dengue patients' demographic and clinical characteristics with laboratory-based diagnosis. We used logistic regressions to estimate the correlation between clinical and laboratory diagnosis of dengue and a full set of dengue signs and symptoms. RESULTS: We found substantial variability in sensitivity and specificity of signs and symptoms ranging from 0.8-81.1 and 21.5-99.6, respectively. Thrombocytopenia exhibited the highest PPV (92.0) and lowest NPV (42.2) and was the only symptom showing agreement with laboratory-confirmed dengue (φ = 0.38). The presence of exanthema and thrombocytopenia led to a greater likelihood of concordant clinical and laboratory diagnoses (exanthema: OR: 4.23; 95% CI: 2.09 to 8.57; thrombocytopenia: OR: 4.02; 95% CI: 1.32 to 12.27). CONCLUSIONS: We found substantial variation in sensitivity, specificity, PPV and NPV of dengue signs and symptoms. For accuracy, clinical and laboratory diagnosis of dengue should be performed concurrently. When laboratory tests are not available, we suggest focusing on the clinical manifestations most associated with dengue.

Impact of capsaicin on aroma release: in vitro and in vivo analysis.

Capsaicin is the main bioactive compound in chili pepper that leads to the perception of "spiciness". However, the effect of capsaicin on aroma release in the nose remains unexplained. This is the first study designed to measure capsaicin's impact on aroma release during consumption. In vitro studies, using static headspace analysis by atmospheric pressure chemical ionization-mass spectrometry (APCI-MS), showed no impact of capsaicin (5 ppm) on the gas-liquid partitioning equilibria of a range of aroma compounds. However, a significant reduction in aroma release was observed in vivo, during oral melting of a model ice cube system (p < 0.05) included 5 ppm capsaicin. The total release of aroma into the nasal cavity was decreased, such that only 49% of 3-methylbutanal, 60% of 1-octen-3-ol and 83% of linalool was released. This is the first evidence of capsaicin's reduction effect on aroma release during consumption. It was also found that 5 ppm capsaicin increased saliva secretion by 75%, which may have led to the dilution of aroma compounds in the mouth and directly impacted the aroma release into the nasal cavity. The most hydrophilic compound (3-methylbutanal) was affected by capsaicin to a greater extent than the hydrophobic compound (linalool), the solvent effect of the additional saliva may explain this.

Biotechnological potential of mangrove sediments: Identification and functional attributes of thermostable and salinity-tolerant ß-glucanase.

Microorganisms native to mangroves are expected to contain enzymes capable of hydrolyzing different carbon sources. However, most of these microorganisms aren't cultivable; hence, alternative techniques as metagenomics are tools for studying and obtaining some of the natural genomes, genes and enzymes of biotechnological interest. The ß-glucanase was produced using a metagenomic clone of mangrove sediments and detected by functional screening on carboxymethylcellulose substrate. The enzyme was purified by cation exchange chromatography. The peptides detected by mass spectrometry showed 20% identity with the polypeptide deduced from the genomic fragment sequenced. The ORF identified as BglfosD9 possessed 729 bp and the encoded protein showed predicted MW and pI of 28kD and 6.8, respectively. The enzyme was active in a wide range of pH (5-10) with optimum pH at 8, had relative activity greater than 50% at all temperatures tested (5-90 °C), was stable at temperatures of 5, 50 and 90 °C and showed excellent relative activity at high NaCl concentrations. This ß-glucanase also showed high relative activity in the presence of SDS and it could hydrolyze ß-glucan, CMC and Avicel as substrates. These findings support the idea of a new thermostable and active enzyme at basic pH from metagenomic library of mangrove sediment.

Outcomes of physical activity for people living with dementia: qualitative study to inform a Core Outcome Set.

BACKGROUND: The need for a Core Outcome Set to evaluate physical activity interventions for people living with dementia, across stages of disease and intervention settings has been established. This qualitative study precedes the consensus phase of developing this Core Outcome Set and aims to: (i) compare the outcomes identified by patients, carers and professionals to those previously reported in the literature; (ii) and understand why certain outcomes are considered important. DESIGN AND METHODS: In-depth semi-structured interviews were conducted with people living with dementia, family carers and professionals (n=29). The outcomes identified in the interviews were mapped to a list of outcomes reported in a recent literature review. An in-depth thematic analysis was conducted to understand the importance of physical activity in dementia care. RESULTS: A comprehensive, inductively derived list of 77 outcomes, common across stages of dementia and intervention setting, was put together for the consensus phase of this Core Outcome Set: ten of these were new outcomes generated by this qualitative study. Five themes explained why stakeholders perceived physical activity outcomes as important for people living with dementia: "being well and staying well", "having a role towards others", "maintaining identity", "being connected to the present" and "delivering good quality care". CONCLUSION: Ten new outcomes of physical activity, not previously reported in recent literature, were identified. Physical activity is considered important to people living with dementia due to its positive impact on multiple health outcomes for both patients and carers.