Spatial distribution of PAHs, nickel, and vanadium in sediments from a large coastal lagoon near a petroleum extraction area in the southern Gulf of Mexico.

One of the world's crucial areas for crude oil exploration and extraction is the southern Gulf of Mexico, where Terminos Lagoon (TL) is located. Sediments from the TL region were used to assess the spatial patterns, origins, and ecotoxicological risks associated with 16 priority polycyclic aromatic hydrocarbons (PAHs; 3.1-248.9 ng⸳g-1 dry weight basis, dw) and trace metals (Ni = 11.0-104.0 mg⸳kg-1; V = 2.0-35.0 mg⸳kg-1 dw) linked to anthropogenic activities. Although origin indices based on PAHs and metals concentrations indicate no crude oil pollution in the region, sources of pyrogenic PAHs were identified. A chemometric approach demonstrated associations between organic matter and PAHs, and that metal accumulation depends mostly by the input of lithogenic materials. Ecotoxicological risk estimations showed a higher risk of possible adverse effects in sites near swamps and mangrove zones, highlighting the need of future monitoring. This study provides a reference for policymakers to conserve Mexico's largest coastal lagoon and other oil-impacted coastal areas worldwide.

Traumatic dental injuries and molar incisor hypomineralization: a cross-sectional study of schoolchildren from southern Brazil.

PURPOSE: To describe the prevalence and the variables associated with TDIs in schoolchildren aged 8 to 14 years in Estância Velha city in southern Brazil, placing emphasis on molar incisor hypomineralization. METHODS: Students enrolled in public schools of a medium-sized city in the southern Brazil were selected using cluster random sampling. Clinical examinations assessed molar incisor hypomineralization-MIH (European Academy of Pediatric Dentistry criteria), dental caries (DMFT index), and TDIs (O'Brien's criteria). Socioeconomic and demographic variables were assessed using a standardized questionnaire. Prevalence ratios were estimated using Poisson regression (p < 0.05). RESULTS: 513 students (54.8% female), with a mean age of 11.6 (± 1.9) years, participated in the study. The prevalence of TDIs was 11.3%, with enamel fracture representing 90.4%. The high prevalence of traumatic dental injuries was associated with MIH (PR: 2.22 CI: 1.27; 3.87; p < 0.01) and overjet > 3 mm (PR: 2.03 CI 1.19; 3.45; p < 0.01). CONCLUSION: The sample of schoolchildren from southern Brazil had a low prevalence of traumatic dental injuries. Molar incisor hypomineralization and increased overjet were associated with the higher prevalence of traumatic dental injuries.

Anticonvulsant activity of Tetrahydrolinalool: behavioral, electrophysiological, and molecular docking approaches.

Tetrahydrolinalool (THL) is an acyclic monoterpene alcohol, produced during linalol metabolism and also a constituent of essential oils. As described in the literature, many monoterpenes present anticonvulsant properties, and thus we became interested in evaluating the anticonvulsant activity of Tetrahydrolinalool using in mice model as well as in silico approaches. Our results demonstrated that THL increased latency to seizure onset and also reduced the mortality, in picrotoxin induced seizure tests. The results may be related to GABAergic regulation, which was also suggested in seizure testing induced by 3-mercapto-propionic acid. In the strychnine-induced seizure testing, none of the groups pretreated with THL modulated the parameters indicative of anticonvulsant effect. The electrophysiological results revealed that THL treatment reduces seizures induced by pentylenetetrazole. The in silico molecular docking studies showed that the interaction between THL and a GABAA receptor model formed a stable complex, in comparison to the crystaligraphic structure of diazepam, a structurally related ligand. In conclusion, all the evidences showed that THL presents effective anticonvulsant activity related to the GABAergic pathway, being a candidate for treatment of epileptic syndromes.

Selective Internal Radiation Therapy Using Y-90 Resin Microspheres for Metastatic Colorectal Cancer: An Updated Systematic Review and Network Meta-Analysis.

INTRODUCTION: This literature review and exploratory network meta-analysis (NMA) aimed to compare the clinical effectiveness and tolerability of selective internal radiation therapy (SIRT) using yttrium-90 (Y-90) resin microspheres, regorafenib (REG), trifluridine-tipiracil (TFD/TPI), and best supportive care (BSC) in adult patients with chemotherapy-refractory or chemotherapy-intolerant metastatic colorectal cancer (mCRC). METHODS: In light of recently published data, the literature was searched to complement and update a review published in 2018. Studies up to December 2022 comparing two or more of the treatments and reporting overall survival (OS), progression-free survival (PFS), or incidence of adverse events (AE) were included. The NMA compared hazard ratios (HRs) for OS and PFS using Markov chain Monte Carlo techniques. RESULTS: Fifteen studies were included, with eight studies added (none addressing SIRT). All active treatments improved OS in relation to BSC. SIRT had the longest OS among all treatments, although without statistically significant differences (HR [95% credible interval] for SIRT, 0.48 [0.27, 0.87]; TFD/TPI, 0.62 [0.46, 0.83]; REG, 0.78 [0.57, 1.05]) in a fixed effects model. Information regarding SIRT was insufficient for PFS analysis, and TFD/TPI was the best intervention (HR 2.26 [1.6, 3.18]). One SIRT study reported radioembolization-induced liver disease in > 10% of the sample; this was symptomatically managed. Non-haematological AEs (hand-foot skin reaction, fatigue, diarrhoea, hypertension, rash or desquamation) were more common with REG, while haematological events (neutropoenia, leukopenia, and anaemia) were more common with TFD/TPI. CONCLUSION: Current evidence supports SIRT treatment in patients with chemotherapy-refractory or chemotherapy-intolerant mCRC compared to newer oral agents, with comparable OS and low incidence of AEs.

Necesidad de información preoperatoria en pacientes intervenidos en el servicio de otorrinolaringología / Need for preoperative information in patients undergoing surgery in the Otorhinolaryngology Department

Resumen Objetivo: determinar las necesidades de información en el preoperatorio de los pacientes atendidos en el servicio de otorrinolaringología del Hospital Nacional Arzobispo Loayza de Lima, Perú. Métodos: investigación de tipo descriptiva y de corte transversal. Se estudiaron 127 pacientes quirúrgicos del servicio de otorrinolaringología. Se utilizó un cuestionario de demandas de información y conocimiento de los pacientes en cuanto a su derecho de decidir una cirugía; contiene preguntas referentes a la descripción de la técnica quirúrgica, complicaciones y riesgos que conlleva la cirugía. Se utilizó una muestra no probabilística por conveniencia, así como el análisis de los datos, el cual se realizó con el paquete estadístico SPSS en versión 25. Para evaluar la correlación entre variables se empleó la prueba chi-cuadrado. Resultados: participaron 127 pacientes, más de 75% de ellos deseaban conocer más información sobre su enfermedad y el tratamiento quirúrgico, 90% manifestaron el deseo de tener una explicación de cómo se realizará la cirugía, 85% necesitaban conocer las complicaciones frecuentes, 20% deseaba ignorar la información sobre posibilidad de muerte. Los adultos jóvenes y el grupo con educación superior demandaban más información (p<0.05), no presentaron diferencias respecto al sexo, salvo en la necesidad de conocer el riesgo de muerte a causa de la cirugía, a favor del sexo femenino (p<0,05). Conclusiones: la mayoría de los pacientes necesitan una información detallada durante la evaluación preoperatoria, principalmente en los grupos de adultos jóvenes y con educación superior. Los médicos debemos brindar información suficiente, clara y con expectativas reales, respetando la autonomía del paciente en la toma de decisiones.

Abstract Aim: To determine the informational needs of preoperative patients being attended at the Otorhinolaryngology Service of the Hospital Nacional Arzobispo Loayza of Lima, Peru. Methods: Using cross-sectional descriptive research, 127 surgical patients from the Otorhinolaryngology Service were studied. A questionnaire asked what information and knowledge the patients had when exercising their right to decide surgery. It contained questions concerning the description of the surgical technique, complications, and risks involved in the surgery. A non probability sample by convenience was used and the data analysis was performed with the SPSS statistical package in version 25 and the chisquare test was used to evaluate the correlation between variables. Results: 127 patients participated, more than 75% of patients wanted to know more information about their disease and the surgical treatment, 90% stated that they needed an explanation of how the surgery would be performed, 85% wanted to know the common complications, and 20% wanted to ignore the possibility of death. Young adults and the group with higher education demanded more information (p<0.05). Concerning sex, there were no differences between the men and women in their answers other than the females needing to know the risk of death due to surgery (p<0.05). Conclusions: Most patients need detailed information during the preoperative evaluation, especially young adults and those with higher education. Physicians should provide sufficient, clear information with realistic expectations, respecting the patient's autonomy in decision-making.

Megasphaera elsdenii and Saccharomyces cerevisiae as direct fed microbials and their impact on ruminal microbiome during an acute acidosis challenge in continuous culture.

Our objective was to evaluate the effects of combinations of Saccharomyces cerevisiae and Megasphaera elsdenii as direct-fed microbials (DFM) on ruminal microbiome during an acute acidosis challenge in a continuous culture system. Treatments provided a DFM dose of 1 × 108 colony-forming unit (CFU)/mL, as follows: control (no DFM), YM1 (S. cerevisiae and M. elsdenii strain 1), YM2 (S. cerevisiae and M. elsdenii strain 2), and YMM (S. cerevisiae and half of the doses of M. elsdenii strains 1 and 2). We conducted four experimental periods of 11 d, which consisted of non-acidotic days (1 to 8) and acidotic challenge days (9 to 11) to establish acute ruminal acidosis conditions with a common basal diet containing 12% neutral detergent fiber and 58% starch. Treatments were applied from days 8 to 11, and samples of liquid and solid-associated bacteria were collected on days 9 to 11. Overall, 128 samples were analyzed by amplification of the V4 region of bacterial 16S rRNA, and data were analyzed with R and SAS for alpha and beta diversity, taxa relative abundance, and correlation of taxa abundance with propionate molar proportion. We observed a lower bacterial diversity (Shannon index, P = 0.02) when YM1 was added to the diet in comparison to the three other treatments. Moreover, compared to control, addition of YM1 to the diet increased relative abundance of phylum Proteobacteria (P = 0.05) and family Succinivibrioceae (P = 0.05) in the solid fraction and tended to increase abundance of family Succinivibrioceae (P = 0.10) and genus Succinivibrio (P = 0.09) in the liquid fraction. Correlation analysis indicated a positive association between propionate molar proportion and relative abundance of Proteobacteria (r = 0.36, P = 0.04) and Succinivibrioceae (r = 0.36, P = 0.05) in the solid fraction. The inclusion of YM1 in high-grain diets with a high starch content resulted in greater abundance of bacteria involved in succinate synthesis which may have provided the substrate for the greater propionate synthesis observed.

Competencias digitales de estudiantes de la maestría en Cuidados Paliativos y Manejo del Dolor

Objetivo: Determinar las competencias digitales de los estudiantes de la maestría en Cuidados Paliativos y Manejo del Dolor de la Facultad de Medicina de la Universidad Nacional Mayor de San Marcos en el año 2022. Materiales y métodos: Investigación de diseño no experimental, descriptivo y de corte transversal. La población de estudio estuvo conformada por los alumnos de la maestría en Cuidados Paliativos y Manejo de Dolor matriculados en el año 2022. Se empleó una muestra no probabilística. Los datos se recolectaron a través de la encuesta Cuestionario de competencias digitales en educación superior (CDES), compuesta por 46 indicadores distribuidos en cinco factores, que tiene una fiabilidad de 0,96 según alfa de Cronbach. Se respetó la confidencialidad de los datos y la autonomía en las decisiones de los participantes. Resultados: Se trabajó con una muestra final de 59 alumnos. La edad promedio fue 38,03 años y el 76,3 % fueron mujeres. Todos los estudiantes contaban con una computadora personal y acceso a internet. El análisis descriptivo determinó un predominio de la valoración "muy importante": 49,2 % para el factor "ciudadanía digital"; 47,5 % para el factor "comunicación y colaboración"; 45,8 % para "creatividad e innovación" y "acceso y uso de la información"; y 44,1 % para el factor "alfabetización digital". Según el análisis global de competencias digitales, 49,2 % manifestó una valoración "muy importante" y 42,4 %, "importante"; no hubo resultados para la denominación "nada importante". Conclusiones: Todos los estudiantes disponen de una computadora personal y cuentan con acceso a internet, lo que ratifica el creciente interés por incluir los aspectos relacionados con la competencia digital en la educación universitaria. El factor "alfabetización tecnológica" presentó menor valoración, mientras que el factor "ciudadanía digital" tuvo mayor valoración. El 91,6 % de estudiantes valora la competencia digital entre importante y muy importante, lo que podría considerarse como muy favorable.

Objective: To determine the digital skills among students of the master's program in Palliative Care and Pain Management at Universidad Nacional Mayor de San Marcos School of Medicine in 2022. Materials and methods: A non-experimental, descriptive and cross-sectional research. The study population was comprised of students of the master's program in Palliative Care and Pain Management enrolled in the year 2022. A non-probability sample was used. Data were collected through the survey "Digital Skills in Higher Education Questionnaire" (CDES), consisting of 46 indicators distributed in five factors with a reliability of 0.96 according to Cronbach's alpha. Data confidentiality and participants' autonomy were respected. Results: The final sample was made up of 59 students, the average age was 38.03 years and 76.3 % were women. All students had a personal computer and Internet access. The descriptive analysis showed that the "very important" rating prevailed: 49.2 % for the "digital citizenship" factor, 47.5 % for the "communication and collaboration" factor, 45.8 % for the "creativity and innovation" and the "access and use of information" factors, and 44.1 % for the "digital literacy" factor. According to the digital skills global analysis, 49.2 % and 42.4 % chose the "very important" and "important" ratings, respectively. There were no results for the "not at all important" rating. Conclusions: All students had a personal computer and Internet access, which confirms the growing interest in including aspects related to digital skills in university education. The "digital literacy" and the "digital citizenship" factors had a lower and higher rating, respectively, compared to the other factors. A total of 91.6 % of the students considered that digital skills are important and very important, which could be considered as highly favorable.

Mutual Information between EDA and EEG in Multiple Cognitive Tasks and Sleep Deprivation Conditions.

Sleep deprivation, a widespread phenomenon that affects one-third of normal American adults, induces adverse changes in physical and cognitive performance, which in turn increases the occurrence of accidents. Sleep deprivation is known to increase resting blood pressure and decrease muscle sympathetic nerve activity. Monitoring changes in the interplay between the central and autonomic sympathetic nervous system can be a potential indicator of human's readiness to perform tasks that involve a certain level of cognitive load (e.g., driving). The electroencephalogram (EEG) is the standard to assess the brain's activity. The electrodermal activity (EDA) is a reflection of the general state of arousal regulated by the activation of the sympathetic nervous system through sweat gland stimulation. In this work, we calculated the mutual information between EDA and EEG recordings in order to consider linear and non-linear interactions and provide an insight of the relationship between brain activity and peripheral autonomic sympathetic activity. We analyzed EEG and EDA data from ten participants performing four cognitive tasks every two hours during 24 h (12 trials). We decomposed EEG data into delta, theta, alpha, beta, and gamma spectral components, and EDA into tonic and phasic components. The results demonstrate high values of mutual information between the EDA and delta component of EEG, mainly in working memory tasks. Additionally, we found an increase in the theta component of EEG in the presence of fatigue caused by sleep deprivation, the alpha component in tasks demanding inhibition and attention, and the delta component in working memory tasks. In terms of the location of brain activity, most of the tasks report high mutual information in frontal regions in the initial trials, with a trend to decrease and become uniform for all the nine analyzed EEG channels as a consequence of the sleep deprivation effect. Our results evidence the interplay between central and sympathetic nervous activity and can be used to mitigate the consequences of sleep deprivation.

HORMONET: a phase II trial of tamoxifen for estrogen/progesterone receptor-positive neuroendocrine tumors.

Background: Nearly 30% of neuroendocrine tumors (NETs) have evidence of immunohistochemical (IHC) expression of estrogen (ER) and/or progesterone (PR) receptors. Therefore, targeting ER/PR may offer an effective NET-directed treatment to select patients. Methods: We conducted a multicenter Simon two-stage single-arm phase II trial of tamoxifen in patients with metastatic, progressive NETs. Eligible patients had positive IHC expression of ER and/or PR ⩾ 1%. Prior therapy with somatostatin analogs was required for progressing/functioning cases. Main exclusion criterion was aggressive disease requiring cytotoxic therapy. The primary end point was disease control rate (DCR) at week 24 by Response Evaluation Criteria in Solid Tumors version 1.1. We planned to enroll 23 patients in the first stage, to reach a DCR at week 24 of 70% (versus 50%); if ⩾12 patients reached the primary end point, a total of 37 would be included. Results: From February 2019 to February 2022, 23 out of 59 patients were eligible and enrolled: 15 (65%) were females; the most common sites were pancreas (11; 48%) and small bowel (6; 26%). In all, 13 patients (56.5%) had G2 NETs. At a median follow-up of 27 months, 13 patients (56.5%) had stable disease at week 24 and median progression-free survival (PFS) was 7.9 months [interquartile range (IQR): 3.7-12.1]. The best response was stable disease in 13 patients, with most patients experiencing minor tumor growth. Median PFS times were not significantly different according to ER/PR < or ⩾30% (p = 0.49) or ER versus PR expression (p = 0.19). One patient experienced grade 2 constipation. Conclusion: Tamoxifen for ER-/PR-positive NETs patients is safe but offers modest antitumor effects. Trial registry name: Study of Tamoxifen in Well Differentiated Neuroendocrine Tumors and Hormone Receptor Positive Expression (HORMONET). URL: https://clinicaltrials.gov/ct2/show/NCT03870399?term=03870399&draw=2&rank=1. Registration number: NCT03870399.

Membrane polarization at the excitation threshold induced by external electric fields in cardiomyocytes of rats at different developmental stages.

External electric fields (E), used for cardiac pacing and defibrillation/cardioversion, induce a spatially variable change in cardiomyocyte transmembrane potential (ΔVm) that depends on cell geometry and E orientation. This study investigates E-induced ΔVm in cardiomyocytes from rats at different ages, which show marked size/geometry variation. Using a tridimensional numerical electromagnetic model recently proposed (NM3D), it was possible: (a) to evaluate the suitability of the simpler, prolate spheroid analytical model (PSAM) to calculate amplitude and location of ΔVm maximum (ΔVmax) for E = 1 V.cm-1; and (b) to estimate the ΔVmax required for excitation (ΔVT) from experimentally determined threshold E values (ET). Ventricular myocytes were isolated from neonatal, weaning, adult, and aging Wistar rats. NM3D was constructed as the extruded 2D microscopy cell image, while measured minor and major cell dimensions were used for PSAM. Acceptable ΔVm estimates can be obtained with PSAM from paralelepidal cells for small θ. ET, but not ΔVT, was higher for neonate cells. ΔVT was significantly greater in the cell from older animals, which indicate lower responsiveness to E associated with aging, rather than with altered cell geometry/dimensions. ΔVT might be used as a non-invasive indicator of cell excitability as it is little affected by cell geometry/size.

Altered phagocytosis and morphogenesis of phenotypic switching-derived strains of the pathogenic Candida tropicalis co-cultured with phagocytic cells.

BACKGROUND AND OBJECTIVE: Candida tropicalis is among the most prevalent human pathogenic yeast species. Switch states of C. tropicalis differ in virulence traits. Here, we evaluate the effect of phenotypic switching on phagocytosis and yeast-hyphae transition in C. tropicalis. METHODS: C. tropicalis morphotypes included a clinical strain and two switch strains (rough variant and rough revertant). In vitro, phagocytosis assay was performed using peritoneal macrophages and hemocytes. The proportion of hyphal cells was ascertained by scoring morphology using optical microscopy. Expression of the WOR1 (White-opaque regulator 1) and EFG1 (Enhanced filamentous growth protein 1) was determined by quantitative PCR. RESULTS: The rough variant was more resistant to in vitro phagocytosis by peritoneal macrophages than that observed for the clinical strain, while hemocytes phagocytosed clinical and rough variant to the same extent. The rough revertant was more phagocytosed than the clinical strain by both phagocytes. During co-incubation with phagocytic cells, the clinical strain of C. tropicalis exists mainly as blastoconidia. The co-culture of the rough variant with macrophages resulted in a higher percentage of hyphae than blastoconidia cells, while in co-culture with hemocytes, no differences were observed between the percentage of hyphae and blastoconidia. The expression levels of WOR1 in the rough variant co-cultured with phagocytes were significantly higher than they were in the clinical strain. CONCLUSIONS: Differences on phagocytosis and hyphal growth between switch states cells of C. tropicalis co-cultured with phagocytic cells were observed. The pronounced hyphal growth may affect the complex host-pathogen relationship and favor the pathogen to escape phagocytosis. The pleiotropic effects of phenotypic switching suggest that this event may contribute to the success of infection associated with C. tropicalis.

Therapy Sequencing in Patients With Advanced Neuroendocrine Neoplasms.

Neuroendocrine neoplasms (NENs) comprise a beautifully complicated, exciting landscape of histologies and clinical behaviors. However, the nuanced complexity of low- and high-grade variants can easily overwhelm both patients and providers. In this chapter, we review the ever-expanding literature on both functioning and nonfunctioning small bowel and pancreatic NENs, touching on somatostatin analogs, hepatic-directed therapies, small molecules, radiopharmaceuticals, immunotherapy, cytotoxic chemotherapy, and new promising agents. Furthermore, we suggest some strategies to address the most challenging scenarios seen in clinical practice, including sequencing of agents, treatment of carcinoid syndrome, and options for well-differentiated high-grade disease.

Characterization of rumen microbiome and metabolome from oro-esophageal tubing and rumen cannula in Holstein dairy cows.

Less invasive rumen sampling methods, such as oro-esophageal tubing, became widely popular for exploring the rumen microbiome and metabolome. However, it remains unclear if such methods represent well the rumen contents from the rumen cannula technique. Herein, we characterized the microbiome and metabolome in the rumen content collected by an oro-esophageal tube and by rumen cannula in ten multiparous lactating Holstein cows. The 16S rRNA gene was amplified and sequenced using the Illumina MiSeq platform. Untargeted metabolome was characterized using gas chromatography of a time-of-flight mass spectrometer. Bacteroidetes, Firmicutes, and Proteobacteria were the top three most abundant phyla representing ~ 90% of all samples. Although the pH of oro-esophageal samples was greater than rumen cannula, we found no difference in alpha and beta-diversity among their microbiomes. The overall metabolome of oro-esophageal samples was slightly different from rumen cannula samples yet more closely related to the rumen cannula content as a whole, including its fluid and particulate fractions. Enrichment pathway analysis revealed a few differences between sampling methods, such as when evaluating unsaturated fatty acid pathways in the rumen. The results of the current study suggest that oro-esophageal sampling can be a proxy to screen the 16S rRNA rumen microbiome compared to the rumen cannula technique. The variation introduced by the 16S rRNA methodology may be mitigated by oro-esophageal sampling and the possibility of increasing experimental units for a more consistent representation of the overall microbial population. Studies should consider an under or over-representation of metabolites and specific metabolic pathways depending on the sampling method.

Creencias actitudinales sobre el comportamiento suicida en profesionales de salud del área de emergencias en un hospital público de Lima, Perú

Introducción: Cada año se producen unas 800 000 muertes por suicidio, superando el número de personas que mueren por homicidio y guerras en todo el mundo. En 2016, el suicidio fue la segunda causa de muerte entre las personas de 15 a 29 años en todo el mundo. Objetivo: Describir las creencias actitudinales sobre el comportamiento suicida en los profesionales de salud del área de emergencias de un hospital público. Metodología: Investigación con enfoque cuantitativo, de tipo descriptivo y de corte transversal. La población estuvo conformada por profesionales que laboraban en el área de emergencias de un hospital público en Lima. Se empleó una muestra no probabilística por conveniencia que estuvo conformada por 93 participantes. Se utilizó el Cuestionario de creencias actitudinales sobre el comportamiento suicida, compuesto por cuatro factores con una confiabilidad de 0,87. Resultados: Participaron 93 profesionales de salud. La edad promedio fue de 35,6 años. El Factor 1: Legitimación del suicidio y el Factor 4: El propio suicidio, son los que presentaron actitudes de rechazo al comportamiento suicida; mientras que el Factor 2: Suicidio en enfermos terminales y el Factor 3: Moral del suicidio, evidenciaron actitudes a favor. Las puntuaciones en los cuatro factores y en el puntaje total del cuestionario, para el grupo de médicos y otros profesionales, no mostraron diferencias significativas. El 51,6% (n=48) pertenecen al percentil 50, que tiene actitudes y creencias indiferentes para el suicidio y el 34,7% (n=23) al percentil 75, que tiene actitudes y creencias a favor de este. Discusión: La mayoría de los participantes mostraron actitudes y creencias neutrales para el suicidio. Solo se evidenciaron actitudes a favor del suicidio en los factores de moral y enfermos terminales. Las creencias actitudinales para los médicos y otros profesionales de la salud no mostraron diferencias significativas.

Introduction: Each year there are some 800,000 deaths by suicide, exceeding the number of people who die by homicide and wars throughout the world. In 2016, suicide was the second leading cause of death among people aged 15-29 worldwide. Objective: To describe attitudinal beliefs about suicidal behavior in health professionals in the emergency area of a public hospital. Methods: Quantitative, descriptive, and cross-sectional research. The population consisted of professionals who worked in the emergency department of a public hospital in Lima. A non-probabilistic convenience sample of 93 participants was used. The Attitudinal Beliefs Questionnaire on suicidal behavior, composed of four factors with a reliability of 0.87, was used. Results: 93 health professionals participated. The average age was 35.6 years. Factor 1: Legitimization of suicide and Factor 4: Suicide itself, showed attitudes of rejection of suicidal behavior, while Factor 2: Suicide in terminally ill patients and Factor 3: Morality of suicide, showed attitudes in favor. The scores in the four factors and in the total score of the questionnaire for the group of physicians and other professionals did not show significant differences. The 51.6% (n=48) belong to the 50th percentile, who have indifferent attitudes and beliefs for suicide and 34.7% (n=23) to the 75th percentile, who have attitudes and beliefs in favor of it. Discussion: Most of the participants showed neutral attitudes and beliefs for suicide. Attitudes in favor of suicide were only evident in the morale and terminally ill factors. Attitudinal beliefs for physicians and other health professionals showed no significant differences.

Genitourinary syndrome in menopause: Impact of vaginal symptoms.

Objective: To describe the impact of genitourinary syndrome symptoms on daily activities and well-being in peri- and postmenopausal women living in an urban area. Materials and Methods: Observational, prospective, and cross-sectional research in a population of peri- and postmenopausal women living in the Lima region. A non-probabilistic sample was used. The instrument used is "The Day-to-Day Impact of Vaginal Aging" questionnaire. It consists of four domains and its internal reliability is between 0.82 and 0.93. The questions were answered using a Likert scale. High values indicate a more severe impact. Statistical procedures were performed using SPSS version 26. Results: One thousand seventy women participated; the mean age was 54±7.5 years. The results about the activities of daily living showed that 35% of women reported regular vaginal symptoms and 14.7% major symptoms. In the emotional well-being domain, 90% had minor symptoms. In the sexual function domain, 57.6% reported minor vaginal symptoms, and in the self-concept and body image domain, 60.9% reported minor symptoms and 20.7% major symptoms. According to the global score, 60.9% reported minor discomfort, 36.3% regular discomfort, and 2.8% major discomfort. The sexually active women declared an impact of severity in terms of their daily activities and sexual function (p<0.05). Conclusion: There is a relationship between activities of daily living, sexual function, and women with sexual activity, causing a negative impact on social life and quality of life.

Use of Solar Panels for Shade for Holstein Heifers.

Animal Agrivoltaics combines electric energy generation, animal thermal comfort, and sustainable production at the same time. This model of production can foster the sustainable intensification of dairy production in tropical areas where solar irradiance is high and nearly constant throughout the year. In this study, we propose Animal Agrivoltaics as an alternative practice to reduce the heat load and eCH4 emissions from dairy heifers in tropical areas. To attest this hypothesis, (1) the meteorological data and the behavioral and physiological responses of the animals were integrated in order to determine the benefits provided by the shade from the solar panels on the thermoregulation of the dairy heifers, and (2) measurements of the enteric methane emissions were taken to determine the potential of the solar panels to offset the GHG. Seven crossbred Holstein heifers (7/8, Holstein × Gyr) with a mean body weight of 242 kg (SD = 53.5) were evaluated in a paddock shaded with ten modules of solar panels. Miniature temperature loggers were used to record the body surface, skin and vaginal temperatures of the heifers every five minutes. The respiratory rate and the shade-use behavior were also monitored by two observers. These measurements were taken from 08:00 to 17:00 h for 18 consecutive days. After completing the field study, the heifers underwent for assessments of the daily oscillations of eCH4 emission using a flow-through respirometry system. The use of shade by the heifers was progressively increased (p < 0.01) with an increasing level of solar irradiance. Lying and ruminating were more likely (p < 0.01) to occur when the heifers were in the shade, especially when the solar irradiance exceeded 500 W m-2. Between 10:00 and 14:00 h, the heifers benefited from the shade produced by the solar panels, with a reduction of 40% in the radiant heat load. With an increasing intensity of solar irradiance, body surface temperature, skin temperature and respiratory rate of the heifers in the shade were lower (p < 0.01) compared to when they were exposed to the sun. The heifers had a daily methane emission total of 63.5 g per animal-1 or 1.7 kg of CO2-eq. Based on this emission rate and the amount of CO2-eq that was not emitted to the atmosphere due to the electricity generated by solar panels, 4.1 m2 of panels per animal (nominal power = 335 W) would be expected to obtain a net-zero eCH4 emission. Over a period of one year (from September 2018 to August 2019), a set of ten photovoltaic panels used in the study produced 4869.4 kWh of electricity, thereby saving US $970.00 or US $48.00 per m2 of solar panel. Based on the results of this study, it can be concluded that use of Animal Agrivoltaics, in addition to producing electricity, has significant potential benefit in providing better thermal comfort to cattle, as well as offsetting the enteric methane emissions released into the environment. In addition, the system would provide extra income to farmers, as well as a potential source of energy micro-generation.

Contextual and individual determinants of tooth loss in the Afro-descendant older adult populations of different countries: a scoping review.

BACKGROUND: The Black population has poorer oral health than other racial groups; however, little is known about the mechanisms that explain this difference. OBJECTIVE: To study the association between race and tooth loss and map the evidence on factors associated with tooth loss in Black older populations. METHODS: Scoping review following the PRISMA Extension for Scoping Reviews conducted according to the recommendations of the Joanna Briggs Institute. A three-step search strategy was applied, and data were collected between April and July 2021. Searches were performed in the PubMed, Lilacs, and SciELO databases. The grey literature was searched using Google Scholar (https://www.scholar.google.com/). The reference lists of included studies were used as additional sources. Studies published in English and Portuguese of the association between tooth loss and different racial groups and the factors associated with tooth loss and tooth retention in Black older adult populations were included. RESULTS: Twenty-one of 913 original articles published between 1995 and 2020 were included. Of these, 75% were research articles, 15% were reports, and 10% dissertations. Eighty per cent reported cross-sectional and 20% longitudinal data. African ancestry was associated with increased odds of tooth loss in older adult populations. Periodontal disease, female sex, and advanced age were the exposures most frequently associated with tooth loss. CONCLUSION: Race, educational level, advanced age, and oral diseases such as periodontitis are associated with increased tooth loss in Afro-descendant older populations.

DNA polymerase θ protects leukemia cells from metabolically induced DNA damage.

Leukemia cells accumulate DNA damage, but altered DNA repair mechanisms protect them from apoptosis. We showed here that formaldehyde generated by serine/1-carbon cycle metabolism contributed to the accumulation of toxic DNA-protein crosslinks (DPCs) in leukemia cells, especially in driver clones harboring oncogenic tyrosine kinases (OTKs: FLT3(internal tandem duplication [ITD]), JAK2(V617F), BCR-ABL1). To counteract this effect, OTKs enhanced the expression of DNA polymerase theta (POLθ) via ERK1/2 serine/threonine kinase-dependent inhibition of c-CBL E3 ligase-mediated ubiquitination of POLθ and its proteasomal degradation. Overexpression of POLθ in OTK-positive cells resulted in the efficient repair of DPC-containing DNA double-strand breaks by POLθ-mediated end-joining. The transforming activities of OTKs and other leukemia-inducing oncogenes, especially of those causing the inhibition of BRCA1/2-mediated homologous recombination with and without concomitant inhibition of DNA-PK-dependent nonhomologous end-joining, was abrogated in Polq-/- murine bone marrow cells. Genetic and pharmacological targeting of POLθ polymerase and helicase activities revealed that both activities are promising targets in leukemia cells. Moreover, OTK inhibitors or DPC-inducing drug etoposide enhanced the antileukemia effect of POLθ inhibitor in vitro and in vivo. In conclusion, we demonstrated that POLθ plays an essential role in protecting leukemia cells from metabolically induced toxic DNA lesions triggered by formaldehyde, and it can be targeted to achieve a therapeutic effect.

The Data Generation Mechanism: Relationship Between Constructs and Their Indicators / O Mecanismo de Geração de Dados: Relação entre Construtos e seus Indicadores

Abstract The choice of statistical data analysis should be guided by a critical analysis that supports the theoretical relationship between the construct and its indicators. This theoretical article reviews the three main existing psychometric paradigms and their proposals for explaining the relationship between indicators and their constructs. The discussion begins with the standard paradigm that guides the construction and analysis of data in psychology, reflective model. Then, a description of the formative models is performed and finally the Network Analysis as an alternative. The definitions, consequences, and limitations of the use of each measurement model are presented such as a reflection on making decisions about which data generation mechanisms are more appropriate.

Resumo A escolha da análise estatística de dados deveria ser guiada por uma análise crítica que fundamenta a relação teórica entre construto e seus indicadores. Este teórico artigo faz uma revisão dos três principais paradigmas psicométricos e suas propostas de explicação da relação entre os indicadores e seus construtos. A discussão é iniciada com o paradigma padrão que guia a construção e análise de dados na psicologia, os modelos reflexivos. Em seguida, é realizada uma descrição dos modelos formativos e, por fim, a proposta da Análise de Redes como alternativa. São apresentadas as definições, consequências e limitações do uso de cada modelo de medida, bem como uma reflexão na tomada de decisão sobre quais mecanismos de geração de dados são mais apropriados.

Cuestionario de representaciones de la menopausia: adaptación y propuesta de versión en español

Introducción. El envejecimiento de la mujer es un evento natural denominado menopausia que requiere su estudio por las diversas manifestaciones y como estas influyen durante su vida. Objetivo. Realizar el diseño y adaptación cultural del cuestionario de representaciones de la menopausia versión en español mediante pruebas de validez y confiabilidad. Métodos. Investigación de adaptación y diseño de validación de cuestionario, participaron mujeres entre 42 a 65 años, atendidas en establecimientos del primer nivel de atención. Se utilizó una muestra aleatoria conformada por 230 mujeres y se consideró la versión en inglés de Menopause Representations Questionnaire para la adaptación. Se realizó la traducción inversa, validez de contenido mediante juicio de expertos, validez convergente a través del coeficiente de correlación de Spearman, análisis de consistencia interna mediante el coeficiente de Alfa de Cronbach y análisis factorial confirmatorio mediante la adecuación de muestra de Kaiser-Meyer-Olkin. Resultados. La edad promedio fue 52,87 ± 6,29 años. La traducción mantuvo el significado de palabras originales, en la valoración de la compresión no se presentaron modificaciones. La validez de contenido presentó un valor de 0,79 según coeficiente de Kappa. Todas las dimensiones mostraron correlación significativa para la validez convergente, la confiabilidad en las cuatro dimensiones osciló entre 0,68 y 0,79 y una confiabilidad total de 0,80. No fue necesario eliminar preguntas y se aceptó el análisis confirmatorio. Conclusión. Es la primera versión traducida al español, tiene una validez y confiabilidad aceptable, puede ser utilizado en intervenciones clínicas y estudios epidemiológicos y útil para describir experiencias desde la perspectiva bio-psicosocial y cultural.

Introduction. The aging of women is a natural event called menopause, which requires its study for the various manifestations and how they influence during her life. Objective. To carry out the design and cultural adaptation of the Spanish version of the menopause representations questionnaire through validity and reliability tests. Methods. Research on the adaptation and validation design of the questionnaire, with the participation of women between 42 and 65 years of age, attended in first level health care facilities. A random sample of 230 women was used and the English version of the Menopause Representations Questionnaire was considered for the adaptation, back translation was performed, content validity through the expert judgment technique, convergent validity through Spearman's correlation coefficient, internal consistency analysis through Cronbach's Alpha coefficient and confirmatory factor analysis through Kaiser-Meyer-Olkin sample adequacy. Results. The mean age was 52.87 ± 6.29, the translation maintained the meaning of the original words, and there were no modifications in the evaluation of comprehension. Content validity by expert judgment showed a value of 0.79 according to Kappa coefficient. All the dimensions showed significant correlation for convergent validity, the reliability in the four dimensions ranged between 0.68 and 0.79 and a total reliability of 0.80. It was not necessary to eliminate questions and the confirmatory analysis was accepted. Conclusion. It is the first version translated into Spanish, has acceptable validity and reliability, can be used in clinical interventions and epidemiological studies, and is useful for describing experiences from a bio psychosocial and cultural perspective.