Marine-Derived Leads as Anticancer Candidates by Disrupting Hypoxic Signaling through Hypoxia-Inducible Factors Inhibition.

The inadequate vascularization seen in fast-growing solid tumors gives rise to hypoxic areas, fostering specific changes in gene expression that bolster tumor cell survival and metastasis, ultimately leading to unfavorable clinical prognoses across different cancer types. Hypoxia-inducible factors (HIF-1 and HIF-2) emerge as druggable pivotal players orchestrating tumor metastasis and angiogenesis, thus positioning them as prime targets for cancer treatment. A range of HIF inhibitors, notably natural compounds originating from marine organisms, exhibit encouraging anticancer properties, underscoring their significance as promising therapeutic options. Bioprospection of the marine environment is now a well-settled approach to the discovery and development of anticancer agents that might have their medicinal chemistry developed into clinical candidates. However, despite the massive increase in the number of marine natural products classified as 'anticancer leads,' most of which correspond to general cytotoxic agents, and only a few have been characterized regarding their molecular targets and mechanisms of action. The current review presents a critical analysis of inhibitors of HIF-1 and HIF-2 and hypoxia-selective compounds that have been sourced from marine organisms and that might act as new chemotherapeutic candidates or serve as templates for the development of structurally similar derivatives with improved anticancer efficacy.

Safety and compliance of long-term low-dose ondansetron in alcohol use disorder treatment.

BACKGROUND: The increasing prevalence of alcohol use disorder (AUD) and the parallel surge in alcohol-associated liver disease (ALD) emphasize the urgent need for comprehensive alcohol management strategies. Low-dose ondansetron (AD04, a 5-HT3 antagonist) was shown recently to be a promising treatment for AUD with a specific genotypic profile (5-marker). The liver safety of AD04 has never been evaluated in subjects with AUD. The aim of the present study was to assess the liver safety profile of AD04 compared with placebo in subjects with AUD. METHODS: Liver biochemical parameters were assessed in subjects with AUD with a 5-marker genetic profile who participated in a Phase 3 randomized controlled trial and received either twice-daily, low-dose AD04 (ondansetron 0.33 mg twice daily) or matching placebo, combined with brief psychosocial counseling. ALT, AST, GGT, Serum Bilirubin, MCV, and Prothrombin were evaluated at weeks 0, 12, and 24. Adverse cardiac events, general well-being, and study completion were also assessed. RESULTS: Low-dose AD04 did not significantly change biochemical markers of liver injury, such as ALT, AST, and Serum Bilirubin. While patients with AUD displayed elevated GGT levels, typically associated with increased alcohol consumption, this parameter remained unaffected by low-dose AD04. Notably, no significant adverse effects were observed due to oral low-dose AD04 treatment. CONCLUSIONS: Low-dose AD04 has the potential to be a safe treatment option for subjects with AUD and ALD, indicating the need for an RCT for this specific cohort. Such a trial would pave the way for the design of a precision treatment for combined AUD with ALD.

Influence of etchant type on the shear bond strength of orthodontic brackets to enamel.

The aim of this study was to evaluate the influence of the type of etchant on the shear bond strength (SBS) of metallic brackets to enamel and the Adhesive Remnant Index (ARI) after debonding. A total of 30 mandibular and maxillary premolars were randomly distributed into groups (n = 10) treated with 1 of 3 enamel surface-conditioning agents: 35% phosphoric acid (PA), 35% glycolic acid (GA), or 35% ferulic acid (FA). The designated acid was applied to the buccal enamel surface of the tooth for 20 seconds, and the tooth was then rinsed with distilled water for 20 seconds and air dried for 5 seconds. A metal bracket was bonded to the prepared surface with light-cured orthodontic resin. After 24 hours, the bracket-tooth interface was submitted to SBS testing in a universal testing machine at a speed of 0.5 mm/min. After debonding, the enamel surface was observed under a stereomicroscope (×20 magnification) to determine the ARI. The generalized linear models showed that the PA and GA groups presented significantly higher SBSs than the FA group (P = 0.0003). The ARI was significantly higher in specimens treated with PA than with the other acids (P < 0.05; Kruskal-Wallis and Dunn tests), with a larger quantity of adhesive remaining adhered to the tooth. Both PA and GA are effective for bonding brackets, but GA resulted in a lower percentage of adhesive remnant adhered to the enamel.

Onion (Allium cepa L.) Skin Waste Valorization: Unveiling the Phenolic Profile and Biological Potential for the Creation of Bioactive Agents through Subcritical Water Extraction.

Onion skin waste (OSW), the primary non-edible byproduct from onion processing, offers a renewable source of bioactive compounds. This study aims to valorize OSW through subcritical water extraction (SWE), aligning with a circular economy and biorefinery principles. SWE was carried out at 145 °C and 50 bar for 50 min in a discontinuous reactor, producing a phenolic-rich extract (32.3 ± 2.6 mg/g) dominated by protocatechuic acid (20.3 ± 2.5 mg/g), quercetin-4'-O-glucoside (7.5 ± 0.2 mg/g), and quercetin (3.2 ± 0.6 mg/g). Additionally, the extract contains sugars (207.1 ± 20.3 mg sucrose-Eq/g), proteins (22.8 ± 1.6 mg BSA-Eq/g), and free amino acids (20.4 ± 1.2 mg arginine-Eq/g). Its phenolic richness determines its scavenging activity against ●NO and O2●- radicals and its α-glucosidase and aldose-reductase inhibition without affecting α-amylase. Notably, the extract demonstrates significant α-glucosidase inhibition (IC50 = 75.6 ± 43.5 µg/mL), surpassing acarbose (IC50 = 129.5 ± 1.0 µg/mL) in both pure enzyme and cell culture tests without showing cytotoxicity to AGS, HepG2, and Caco-2 human cell lines. The extract's bioactivity and nutritional content make it suitable for developing antioxidant and antidiabetic nutraceutical/food components, highlighting SWE's potential for OSW valorization without using organic solvents.

Exploring critical factors in pediatric palliative care in Latin America: A scoping review.

This scoping review aimed to provide an overview of the current landscape of pediatric palliative care in Latin America, including policies, regulations, available resources, challenges, barriers, and evidence-based recommendations. We conducted a comprehensive search for peer-reviewed articles related to pediatric palliative care in Latin America, considering both review and empirical articles published in English, Portuguese, or Spanish within the last decade. Our review initially identified 30 publications, which were subjected to a full-text assessment. The majority of these articles originated from Brazil, Mexico, and Chile, highlighting a regional concentration of research efforts. Notably, we observed a scarcity of comprehensive research and specific studies on pediatric palliative care in Latin America. Our findings revealed significant challenges, including resource limitations, the absence of dedicated policies, and the critical need for interdisciplinary teams to address the multifaceted aspects of pediatric palliative care. In light of our review, we emphasise the necessity for more extensive and representative research efforts, as well as the continuous updating of scientific evidence in the field of pediatric palliative care within the Latin American context. The recommendations derived from this review aim to contribute to the enhancement of pediatric palliative care services and accessibility throughout Latin America.

Mitochondrial Dysfunction in Skeletal Muscle of Rotenone-Induced Rat Model of Parkinson's Disease: SC-Nanophytosomes as Therapeutic Approach.

The development of new therapeutic options for Parkinson's disease (PD) requires formulations able to mitigate both brain degeneration and motor dysfunctions. SC-Nanophytosomes, an oral mitochondria-targeted formulation developed with Codium tomentosum membrane polar lipids and elderberry anthocyanin-enriched extract, promote significant brain benefits on a rotenone-induced rat model of PD. In the present work, the effects of SC-Nanophytosome treatment on the skeletal muscle tissues are disclosed. It is unveiled that the rotenone-induced PD rat model exhibits motor disabilities and skeletal muscle tissues with deficient activity of mitochondrial complexes I and II along with small changes in antioxidant enzyme activity and skeletal muscle lipidome. SC-Nanophytosome treatment mitigates the impairment of complexes I and II activity, improving the mitochondrial respiratory chain performance at levels that surpass the control. Therefore, SC-Nanophytosome competence to overcome the PD-related motor disabilities should be also associated with its positive outcomes on skeletal muscle mitochondria. Providing a cellular environment with more reduced redox potential, SC-Nanophytosome treatment improves the skeletal muscle tissue's ability to deal with oxidative stress stimuli. The PD-related small changes on skeletal muscle lipidome were also counteracted by SC-Nanophytosome treatment. Thus, the present results reinforces the concept of SC-Nanophytosomes as a mitochondria-targeted therapy to address the neurodegeneration challenge.

Variations of work engagement and psychological distress based on three working modalities during the COVID-19 pandemic.

With the onset of the COVID-19 pandemic, the rapid spread of the SARS-CoV-2 virus became a global health threat affecting people's mental and physical health, as well as working conditions and modalities. The reorganization of the work environment also affected work engagement and psychological distress levels. This manuscript assesses how work engagement and distress vary according to gender and age across three working modalities. We used a voluntary response sampling strategy to collect data on psychological distress and work engagement between August 2021 and January 2022. Results are from 542 people working in Ecuador during the COVID-19 pandemic. Overall, participants experienced psychological distress; women and younger participants presented higher psychological distress. Regarding engagement, the sample showed average levels of total engagement, average levels of vigor, and high levels of dedication and absorption. Men presented higher levels of total work engagement and vigor. Psychological distress was significantly and negatively correlated with total work engagement scores and its three factors. There were no differences in work engagement according to the different modalities. However, teleworkers reported significantly higher levels of psychological distress than hybrid workers. Findings are discussed considering ideas for decision-makers to explore the benefits of flexible working practices.

Antifungal Activity of Guiera senegalensis: From the Chemical Composition to the Mitochondrial Toxic Effects and Tyrosinase Inhibition.

Pest resistance against fungicides is a widespread and increasing problem, with impact on crop production and public health, making the development of new fungicides an urgent need. Chemical analyses of a crude methanol extract (CME) of Guiera senegalensis leaves revealed the presence of sugars, phospholipids, phytosterols, guieranone A, porphyrin-containing compounds, and phenolics. To connect chemical composition with biological effects, solid-phase extraction was used to discard water-soluble compounds with low affinity for the C18 matrix and obtain an ethyl acetate fraction (EAF) that concentrates guieranone A and chlorophylls, and a methanol fraction (MF) dominated by phenolics. While the CME and MF exhibited poor antifungal activity against Aspergillus fumigatus, Fusarium oxysporum and Colletotrichum gloeosporioides, the EAF demonstrated antifungal activity against these filamentous fungi, particularly against C. gloeosporioides. Studies with yeasts revealed that the EAF has strong effectiveness against Saccharomyces cerevisiae, Cryptococcus neoformans and Candida krusei with MICs of 8, 8 and 16 µg/mL, respectively. A combination of in vivo and in vitro studies shows that the EAF can function as a mitochondrial toxin, compromising complexes I and II activities, and as a strong inhibitor of fungal tyrosinase (Ki = 14.40 ± 4.49 µg/mL). Thus, EAF appears to be a promising candidate for the development of new multi-target fungicides.

Access to cancer pain management in Ecuador from health workers' perspective: a qualitative study.

Background: Ecuador is facing increasing health-related suffering due to cancer; however, the distributed opioid analgesic in the country is below the global average. Aim: This study explores the access to cancer pain management (CPM) from the healthcare professionals' perspective in a middle-income country. Methods: Thirty problem-centered interviews with healthcare providers were conducted in six cancer facilities and were analyzed thematically. Results: Limited and unequal access to opioid analgesics was reported. Structural weaknesses of the healthcare system restrain access for the poorest, at the primary care level, and for people living in remote areas. The lack of education among the healthcare personnel, patients, and society was identified as the main barrier. Conclusion: Access barriers were interrelated; therefore multisectoral strategies must be considered to improve access to CPM.

The number of patients with cancer in Ecuador is growing. It is known that people with a cancer diagnosis often experience severe pain, which requires opioid analgesics. In this study, we explore the opinion of healthcare providers regarding access to opioid analgesics to alleviate cancer pain in Ecuador. We interviewed 30 healthcare professionals working at six cancer centers in different cities, who deal daily with patients with a cancer diagnosis. We found that it is difficult for cancer patients in the country to access adequate pain therapy and this generates avoidable severe health-related suffering. The structure of the healthcare system makes it difficult to be supplied with the medication they need. That is worst for the country's poor and people in rural areas. The main problem is the lack of knowledge on the subject among health workers, patients and society. We conclude that the obstacles in providing patients access to cancer pain relief lie in different areas, including the healthcare system, the healthcare professionals and the patients and society, all of which are interrelated. All areas must work together to improve the situation.

An Experimental Approach to Address the Functional Relationship between Antioxidant Enzymes and Mitochondrial Respiratory Complexes.

Mitochondrial dysfunction and cytosolic oxidative stress are pathological biomarkers interlinked in several chronic diseases and cellular toxicity promoted by high-energy radiation or xenobiotics. Thus, assessing the activities of the mitochondrial redox chain complexes and the cytosolic antioxidant enzymes in the same cell culture system is a valuable approach to addressing the challenge of chronic diseases or unveiling the molecular mechanisms underlying the toxicity of physical and chemical stress agents. The present article gathers the experimental procedures to obtain, from isolated cells, a mitochondria-free cytosolic fraction and a mitochondria-rich fraction. Furthermore, we describe the methodologies to evaluate the activity of the main antioxidant enzymes in the mitochondria-free cytosolic fraction (superoxide dismutase, catalase, glutathione reductase and glutathione peroxidase), and the activity of the individual mitochondrial complexes I, II and IV, as well as the conjugated activity of complexes I-III and complexes II-III in the mitochondria-rich fraction. The protocol to test the citrate synthase activity was also considered and used to normalize complexes. The procedures were optimized within an experimental setup to allow that each condition to be tested only requires sampling of one T-25 flask of cells 2D cultured, as the typical results presented and discussed here.

Kitul, a food plant with antidiabetic-like effects: Reduction of intracellular reactive species in glucose-stimulated RIN-5F pancreatic ß-cells and mitigation of pro-inflammatory mediators in activated RAW 264.7 macrophages.

Kitul (Caryota urens L.) inflorescences are broadly used for sweet sap production in Asian countries and Kitul food products are known as being suitable for diabetic patients. Considering the strong ability to inhibit α-glucosidase, we hypothesize that kitul antidiabetic properties might also involve the modulation of inflammatory pathways and hyperglycaemia-induced oxidative damage. Hence, the effects of an inflorescence's methanol extract were investigated in glucose-stimulated pancreatic cells (RIN-5F) and LPS-stimulated RAW 264.7 macrophages. The extract reduced the overproduction of intracellular reactive species in pancreatic cells and also NO, L-citrulline and IL-6 levels in LPS-stimulated RAW 264.7 macrophages. Inhibition of 5-lipoxygenase (IC50 = 166.1 µg/mL) through an uncompetitive manner was also recorded upon treatment with C. urens inflorescences extract. The phenolic profile of the inflorescences was characterized by HPLC-DAD, six hydroxycinnamic acids being identified and quantified. Overall, our data provide additional evidence on the pleiotropic mechanisms of Kitul inflorescences as an antidiabetic agent.

Evaluation of Molecular Methods to Identify Chagas Disease and Leishmaniasis in Blood Donation Candidates in Two Brazilian Centers.

In Brazil, blood donation is regulated by the Brazilian Ministry of Health, and all States follow the same protocol for clinical and laboratory screening. Brazil is an endemic country for Chagas disease (CD), caused by Trypanosoma cruzi, and for leishmaniasis, caused by a species of Leishmania spp. Screening for leishmaniosis is not routinely performed by blood banks. Given the antigenic similarity between T. cruzi and Leishmania spp., cross-reactions in serological tests can occur, and inconclusive results for CD have been found. The objective of this study was to apply molecular techniques, e.g., nPCR, PCR, and qPCR, to clarify cases of blood donation candidates with non-negative serology for CD and to analyze the difference between the melting temperature during real-time PCR using SYBR Green. Thirty-seven cases that showed non-negative results for CD using chemiluminescent microparticle immunoassay (CMIA) tests from blood banks in Campo Grande, MS, and Campinas, SP, were analyzed. In the serum samples, 35 samples were evaluated by ELISA, and 24.3% (9/35) showed positive results for CD. nPCR was able to detect 12 positive results in 35 samples (34.28%). qPCR for T. cruzi was quantifiable in the samples that showed a value ≥0.002 par eq/mL (parasite equivalents per milliliter), and in 35 samples, 11 (31.42%) were positive. Of all evaluated samples using the described tests (CMIA, ELISA, nPCR, and qPCR), 18 (48.6%) were positive for CD. For MCA by qPCR, the melting temperature was 82.06 °C ± 0.46 for T. cruzi and 81.9 °C ± 0.24 for Leishmania infantum. The Mann-Whitney test showed a significant value of p < 0.0001. However, the differentiation between T. cruzi and L. infantum could not be considered due to temperature overlap. For leishmaniasis, of the 35 samples with non-negative serology for CD tested by the indirect fluorescent antibody test (IFAT), only one sample (2.85%) was positive (1:80). The PCR for Leishmania spp. was performed on 36 blood samples from donation candidates, and all were negative. qPCR for L. infantum showed 37 negative results for the 37 analyzed samples. The data presented here show the importance of performing two different tests in CD screening at blood banks. Molecular tests should be used for confirmation, thereby improving the blood donation system.

O traumático e as disputas pela memória na cena pública brasileira: Marielle Franco e Borba Gato

Por meio de um método ensaístico, sustentado pela teoria psicanalítica e seus enlaces com as teorias decoloniais e sociais críticas, este artigo reflete sobre as disputas pela memória e as possibilidades de elaboração de traumas coloniais, analisando os simbolismos de duas experiências ocorridas na cena pública brasileira: a quebra da placa em homenagem à memória de Marielle Franco e a queima da estátua em homenagem à Borba Gato. Apontamos que a aparição destas duas figuras no espaço público, bem como o atentado a elas, instauram diferentes possibilidades de compreensão da história e de elaboração de traumas psicossociais. Concluímos que o atentado à placa de Marielle se trata de uma tentativa de apagar sua memória, bem como dos diversos grupos oprimidos (mulheres, LGBTQIA+, pessoas negras) simbolizados por ela, mantendo, assim, as repetições mórbidas oriundas dos traumas coloniais. Já o atentado à estátua de Borba, simbolismo da expansão bandeirante no país, tensiona uma história oficial que oblitera as violentas ações perpetradas pelo Estado e segmentos da sociedade civil.

Attitudes Toward Lesbians, Gay Men, and Their Rights in a Sample of Ecuadorian Cisgender Men and Women.

Since 1997, Ecuador has undergone a series of changes to ensure family rights to sexual minorities. However, there is still limited research regarding attitudes toward them. This study focused on the attitudes toward lesbians (L), gay men (G), and their rights. A sample of 318 cisgender Ecuadorians who responded to an online survey was recruited. Analyses indicated that men, heterosexuals, who practice their religion, attend more frequently to religious services, and identify as conservative showed higher levels of prejudice against LG as well as less support toward their rights. Further, participants who did not have LG acquaintances, friends, family members, and those who did not know any LG parented family showed less support toward these populations. Multiple regression analyses indicated that believing that a person's sexual orientation is learned significantly predicted the attitudes measured in our study. Implications of these findings to help reduce prejudice against LG individuals are discussed.

An integrated in vitro approach on the enzymatic and antioxidant mechanisms of four commercially available essential oils (Copaifera officinalis, Gaultheria fragrantissima, Helichrysum italicum, and Syzygium aromaticum) traditionally used topically for their anti-inflammatory effects.

Introduction: Despite the increasing number of essential oils being reported on their potential therapeutic effects, some remain relatively unknown on their biological properties. That is the case of the essential oils obtained from copaiba (Copaifera officinalis L.), wintergreen (Gaultheria fragrantissima Wall.), everlasting (Helichrysum italicum (Roth) G.Don) and clove (Syzygium aromaticum (L.) Merr. & L.M.Perry), commonly labelled as being useful on the amelioration of conditions with an inflammatory background. Methods: To further broaden the current knowledge on the four essential oils, commercially available samples were approached on their effects upon a series of mediators that are involved on the inflammatory and oxidative response, both through in vitro cell-free and cell-based assays (5-lipoxygenase activity, lipid peroxidation, free radical and nitric oxide radical scavenging properties or tyrosinase inhibition). Results: The four oils proved to be active at some of the concentrations tested in most of the performed assays. Significant differences were found between the essential oils, S. aromaticum proving to tbe the most active, followed by G. fragrantissima against 5-lipoxygenase (5-LOX) and linoleic acid peroxidation, proving their potential use as antioxidants and anti-inflammatory agents. In fact, the IC50 value of S. aromaticum in the 5-LOX assay was 62.30 µg mL-1. Besides S. aromaticum efficiently scavenged superoxide radicals generated by xanthine/xanthine oxidase, displaying an IC50 value of 135.26 µg mL-1. The essential oil obtained from H. italicum exhibited a significant decrease in the nitric oxide levels on BV-2 cells, showing its potential as a cytoprotective agent against toxic damage. Copaiba oil ranked first as the most potent tyrosinase inhibitor, exhibiting an IC50 98.22 µg mL-1. Conclusion: More studies are needed to describe the essential oils properties, but these results confirm the potential of these essential oils as anti-inflammatory and antioxidant agents.

Vasorelaxant Mechanism of Herbal Extracts from Mentha suaveolens, Conyza canadensis, Teucrium polium and Salvia verbenaca in the Aorta of Wistar Rats.

Mentha suaveolens (MS), Conyza canadensis (CC), Teucrium polium (TP) and Salvia verbenaca (SV) are used in Morocco to treat hypertension. Our aim was to characterize the composition and vasoreactivity of extracts of MS, CC, TP and SV. The chemical compositions of aqueous extracts of MS, SV and TP, and of a hydromethanolic extract of CC, were identified by HPLC-DAD. The vasoreactive effect was tested in rings of the thoracic aorta of female Wistar rats (8-14 weeks-old) pre-contracted with 10 µM noradrenaline, in the absence or presence of L-NAME 100 µM, indomethacin 10 µM or atropine 6 µM, to inhibit nitric oxide synthase, cyclooxygenase or muscarinic receptors, respectively. L-NAME and atropine decreased the vasorelaxant effect caused by low concentrations of MS. Atropine and indomethacin decreased the vasorelaxant effect of low concentrations of SV. High concentrations of MS or SV and the effect of SV and TP were not altered by any antagonist. The activation of muscarinic receptors and NO or the cyclooxygenase pathway underlie the vasorelaxant effect of MS and SV, respectively. Neither of those mechanisms underlines the vasorelaxant effect of CC and TP. These vasorelaxant effect might support the use of herbal teas from these plants as anti-hypertensives in folk medicine.

Characterization of HIV-1 Transmission Clusters Inferred from the Brazilian Nationwide Genotyping Service Database.

The study of HIV-1 transmission networks inferred from viral genetic data can be used to clarify important factors about the dynamics of HIV-1 transmission, such as network growth rate and demographic composition. In Brazil, HIV transmission has been stable since the early 2000s and the study of transmission clusters can provide valuable data to understand the drivers of virus spread. In this work, we analyzed a nation-wide database of approximately 53,000 HIV-1 nucleotide pol sequences sampled from genotyped patients from 2008-2017. Phylogenetic trees were reconstructed for the HIV-1 subtypes B, C and F1 in Brazil and transmission clusters were inferred by applying genetic distances thresholds of 1.5%, 3.0% and 4.5%, as well as high (>0.9) cluster statistical support. An odds ratio test revealed that young men (15-24 years) and individuals with more years of education presented higher odds to cluster. The assortativity coefficient revealed that individuals with similar demographic features tended to cluster together, with emphasis on features, such as place of residence and age. We also observed that assortativity weakens as the genetic distance threshold increases. Our results indicate that the phylogenetic clusters identified here are likely representative of the contact networks that shape HIV transmission, and this is a valuable tool even in sites with low sampling density, such as Brazil.

Fatores preditivos para a cicatrização de úlceras da perna em pessoas com doença falciforme: coorte retrospectivo / Factors predictive of leg ulcer healing in people with sickle cell disease: a retrospective cohort / Factores predictivos de la cicatrización de úlceras de la pierna en personas con anemia falciforme: cohorte retrospectivo

Objetivo: identificar a taxa de cicatrização e os fatores preditivos para cura das úlceras da perna em pessoas com doença falciforme. Método: coorte retrospectivo, realizado de junho a agosto de 2020, em um serviço especializado de tratamento de pessoas com feridas, contemplando um período de nove anos, com amostra de 52 úlceras que atenderam os critérios de elegibilidade. Protocolo de pesquisa aprovado pelo comitê de ética. Resultados: a taxa de cicatrização foi 76,9%. Os fatores que contribuíram para cura em um menor tempo foram a não recidiva (HR= 3,03; IC 95%: 1,07-8,60) e extensão abaixo da mediana 7,25 cm2 (HR= 2,25; IC 95%: 1,19-4,27). Fatores para a não cicatrização foram: coberturas de alginato de cálcio (HR=0,29; IC 95%: 0,13-0,62), carvão com prata (HR=0,06; IC 95%: 0,02-0,21) e outras (HR=0,35; IC 95%: 0,15-0,80). Conclusão: a taxa de cicatrização da úlcera foi elevada. Recidiva, área da úlcera e determinadas coberturas podem influenciar no processo de cura.

Objective: to identify the healing rate and predictive factors for healing of leg ulcers in people with sickle cell disease. Method: retrospective cohort, carried out from June to August 2020, in a specialized service for the treatment of people with wounds, covering a period of nine years, with a sample of 52 ulcers that met the eligibility criteria. Research protocol approved by the ethics committee. Results: healing rate was 76.9%. The factors that contributed to cure in a shorter time were non-recurrence (HR= 3.03; 95% CI: 1.07-8.60) and extension below the median 7.25 cm2 (HR= 2.25; CI 95%: 1.19-4.27). Factors for non-healing were: calcium alginate dressings (HR=0.29; 95% CI: 0.13-0.62), charcoal with silver (HR=0.06; 95% CI: 0.02- 0.21) and others (HR=0.35; 95% CI: 0.15-0.80). Conclusion: the ulcer healing rate was high. Recurrence, ulcer area and certain dressings can influence the healing process.

Objetivo: identificar la tasa de curación y los factores predictivos para la curación de las úlceras en las piernas en pacientes con enfermedad de células falciformes. Método: cohorte retrospectiva, realizada de junio a agosto de 2020, en un servicio especializado para el tratamiento de personas con heridas, cubriendo un período de nueve años, con una muestra de 52 úlceras que cumplieron con los criterios de elegibilidad. Protocolo de investigación aprobado por el comité de ética. Resultados: La tasa de cicatrización fue del 76,9%. Los factores que contribuyeron a la curación en menor tiempo fueron la no recurrencia (HR= 3,03; IC 95%: 1,07-8,60) y extensión por debajo de la mediana de 7,25 cm2 (HR= 2,25; IC 95%: 1,19-4,27). Los factores de no cicatrización fueron: apósitos de alginato de calcio (HR=0,29; IC 95%: 0,13-0,62), carbón con plata (HR=0,06; IC 95%: 0,02-0,21) y otros (HR=0,35; IC 95%: 0,15-0,80). Conclusión: la tasa de curación de la úlcera fue alta. La recurrencia, el área de la úlcera y ciertos revestimientos pueden influir en el proceso de curación.

A Comparison of Working Conditions and Workers' Perceptions among On-Site, Telework, and Hybrid Workers in Ecuador during the COVID-19 Pandemic.

The COVID-19 pandemic has forced many companies to adopt different work modalities to ensure their operation during this period. In this study, we described and compared working conditions and perceptions among face-to-face workers, teleworkers, and hybrid workers in Ecuador. A cross-sectional study was conducted with a sample of 542 participants, using a self-report survey to assess sociodemographic data, working conditions, and workers' perceptions. Variables were described and then compared by the Chi-square test, ANOVA, and the Kruskal-Wallis test. The results indicated a higher proportion of on-site workers without higher education and in the public sector compared to the other modalities. At the same time, there was evidence of increased perceived productivity. People in the hybrid modality tended to have more than one job, earning a higher monthly salary, perceiving a decrease in productivity, an increase in daily working hours, and a lower capacity for time management. In addition, most teleworkers reported fair working conditions, a dedicated workspace, and easy adaptation to this work mode. This study builds a more in-depth understanding of how workers perceived their working conditions among work modalities for organizational decision-making because the evolution of the COVID-19 pandemic is modifying the ways of working permanently.

Anti-Inflammatory Activity of Olive Oil Polyphenols-The Role of Oleacein and Its Metabolites.

The anti-inflammatory potential of oleacein, the main polyphenolic compound found in olive oil, and its main metabolites were characterized by their effects on RAW 264.7 macrophages challenged with lipopolysaccharide (LPS), and by their ability to inhibit enzymes of the arachidonic acid metabolism with a key role in the synthesis of pro-inflammatory lipid mediators. Oleacein at 12.5 µM significantly decreased the amount of L-citrulline and ●NO generated by LPS-stimulated macrophages. Hydroxytyrosol, hydroxytyrosol acetate and hydroxytyrosol acetate sulfate were also able to reduce the cellular amount of ●NO, although to a lesser extent. In contrast, hydroxytyrosol glucuronide and sulfate did not show detectable effects. Oleacein was also able to inhibit the coupled PLA2 + 5-LOX enzyme system (IC50 = 16.11 µM), as well as the 5-LOX enzyme (IC50 = 45.02 µM). Although with lower activity, both hydroxytyrosol and hydroxytyrosol acetate were also capable of inhibiting these enzymes at a concentration of 100 µM. None of the other tested metabolites showed a capacity to inhibit these enzymes. In contrast, all compounds, including glucuronides and sulfate metabolites, showed a remarkable capacity to inhibit both cyclooxygenase isoforms, COX-1 and COX-2, with IC50 values lower than 3 µM. Therefore, oleacein and its metabolites have the ability to modulate ●NO- and arachidonic acid-dependent inflammatory cascades, contributing to the anti-inflammatory activity associated with olive oil polyphenols.