Pimobendan controlled release guar gum printlets: Tailoring drug doses for personalised veterinary medicines.

Treating chronic heart diseases in dogs is challenging due to variations in mass within and between species. Pimobendan (PBD), a veterinary drug only, is prescribed in specific cases of chronic heart disease in dogs and is available on the market in only a few different doses. Furthermore, the therapy itself is challenging due to the large size of the chewable tablets and the requirement for twice-daily administration. The development of customised and on-demand PBD medicines by three-dimensional (3D) printing has been proposed to circumvent these disadvantages. In this study, we designed controlled-release flavoured printlets containing PBD. We evaluated the use of two natural polymers, guar or xanthan gums, as the main component of the printing inks. Guar gum showed the better rheological behavior and printability by semisolid extrusion. The printlets were produced in three different shapes and sizes to allow dose customisation. Guar gum printlets showed a PBD controlled release profile, regardless of their shape or size. Therefore, we have demonstrated a novel approach for controlling PBD drug release and tailoring the dose by employing a natural polymer to produce 3D-printed tablets. This study represents a significant step towards the development of 3D-printed guar gum controlled-release formulations for veterinary applications.

CRISPRals: a web database for assessing CRISPR defense system in Ralstonia solanacearum species complex to avoid phage resistance.

CRISPR has been widely characterized as a defense system against phages and other invading elements in bacteria and archaea. A low percentage of Ralstonia solanacearum species complex (RSSC) strains possess the CRISPR array and the CRISPR-associated proteins (Cas) that would confer immunity against various phages. In order to provide a wide-range screen of the CRISPR presence in RSSC, we analyzed 378 genomes of RSSC strains to find the CRISPR locus. We found that 20.1%, 14.3%, and 54.5% of the R. solanacearum, R. pseudosolanacearum, and R. syzygii strains respectively possess the CRISPR locus. In addition, we performed further analysis to identify the respective phages that are restricted by the CRISPR arrays. We found 252 different phages infecting different strains of RSSC, by means of the identification of similarities between the protospacers in phages and spacers in bacteria. We compiled this information in a database with web access called CRISPRals (https://crisprals.yachaytech.edu.ec/). Additionally, we made available a number of tools to detect and identify CRISPR array and Cas genes in genomic sequences that could be uploaded by users. Finally, a matching tool to relate bacteria spacer with phage protospacer sequences is available. CRISPRals is a valuable resource for the scientific community that contributes to the study of bacteria-phage interaction and a starting point that will help to design efficient phage therapy strategies.

Multiple stable isotopes (C, N & S) provide evidence for fin whale (Balaenoptera physalus) trophic ecology and movements in the Humboldt Current System of northern Chile.

Reflecting the intense coastal upwelling and high primary productivity characteristic of the Humboldt Current System (HCS), the northern coast of Chile supports a diverse and productive community of marine consumers, including worldwide important pelagic fisheries resources. Although marine mammals are relatively understudied in the region, recent studies have demonstrated that fin whale (Balaenoptera physalus) is the most frequently encountered whale species, and forages in these waters year-round. However, a current lack of information limits our understanding of whether fin whales actively feed and/or remain resident in these waters or whether whales are observed feeding as they migrate along this part of the Pacific. Here, we use stable isotope ratios of carbon, nitrogen and sulphur of fin whale skin samples collected in early summer 2020 (n = 18) and in late winter 2021 (n = 22) to examine evidence of temporal isotopic shifts that could provide information on potential migratory movements and to estimate likely consumption patterns of putative prey (i.e. zooplankton, krill, pelagic fishes and Pleuroncodes sp.). We also analysed prey items in fin whale faecal plumes (n = 8) collected during the study period. Stable isotope data showed significant differences in the isotopic values of fin whales from summer and winter. On average, summer individuals were depleted in 15N and 34S relative to those sampled during winter. Whales sampled in summer showed greater isotopic variance than winter individuals, with several showing values that were atypical for consumers from the HCS. During winter, fin whales showed far less inter-individual variation in stable isotope values, and all individuals had values indicative of prey consumption in the region. Analysis of both stable isotopes and faeces indicated that fin whales sighted off the Mejillones Peninsula fed primarily on krill (SIA median contribution = 32%; IRI = 65%) and, to a lesser extent, zooplankton (SIA zooplankton = 29%; IRI copepod = 33%). These are the first isotopic-based data regarding the trophic ecology of fin whales in the north of Chile. They provide evidence that fin whales are seasonally resident in the area, including individuals with values that likely originated outside the study area. The information presented here serves as a baseline for future work. It highlights that many aspects of the ecology of fin whales in the Humboldt Current and wider SE Pacific still need to be clarified.

Extubation in the Operating Room After Coronary Artery Bypass Graft Surgery Reduces Hospital Stay.

OBJECTIVES: The aim of this analysis was to compare the effect of extubating in the operating room (OR) versus and the intensive care unit (ICU) among patients undergoing coronary artery bypass grafting (CABG). DESIGN: A retrospective cohort analysis. SETTING: Ten cardiac referral hospitals in Latin America; participants of the São Paulo Registry of Cardiovascular Surgery II (REPLICCAR II). PARTICIPANTS: The database included a total of 4,015 patients who underwent primary and isolated CABG surgery and were ≥18 years old, of whom 205 patients were extubated in the OR. INTERVENTIONS: The analysis was made after a propensity score matching (PSM) adjustment in the population sample of patients extubated in the OR and ICU by the following variables: sex, age, body mass index, smoking, type of surgery, chronic obstructive pulmonary disease, preoperative atrial fibrillation, cardiopulmonary bypass time, preoperative creatinine, and preoperative left ventricular ejection fraction. MEASUREMENTS AND MAIN RESULTS: This study focused on the analysis of the ICU and hospital length of stay, need for reintubation, morbidity, and mortality. After PSM, 402 patients were analyzed. Both groups had similar baseline characteristics, such as age (p = 0.132), sex (p = 1.00), and estimated risk of prolonged ventilation (>24 hours, p = 0.168); however, the median ventilation time was significantly shorter in the group extubated in the OR compared to the ICU group (5.67 hours v 17.55 hours, p < 0.001). The group of patients extubated in the ICU had a longer postoperative stay (7.54 ± 3.40 days v 6.41 ± 2.91 days, p < 0.001) and longer total hospitalization time (11.49 ± 5.70 days v 10.36 ± 5.72, p = 0.013) compared to those extubated in the OR. The authors did not observe a significant difference in the need for reintubation, morbidity, or mortality rates among the evaluated groups. CONCLUSIONS: In the REPLICCAR II database, extubation performed in the OR was associated with a reduced length of postoperative and total hospital stays compared to extubation in the ICU.

Biological, demographic, and health factors associated with HPV infection in Ecuadorian women.

Objectives: The study aims to identify the correlation between human papillomavirus (HPV) infection and sociodemographic and sexual reproductive health factors in Ecuadorian women from March to August 2019. Methods: 120 women were randomly selected from two gynecological clinics to complete a questionnaire and provide a biospecimen. PCR-Hybridization was used to genotype 37 HPV serotypes in samples obtained by endo-cervical brushing for liquid-based cytology. Sociodemographic and sexual health data were collected through a validated questionnaire during a medical consultation. Mathematical modeling of HPV infection was done using bivariate logistic regression. Results: 65.0% of the women sampled had an HPV infection; 74.3% of these women had co-infections with other HPV genotypes. Out of the women who were HPV positive, 75.6% were diagnosed with high-risk genotypes from HPV strains 18, 35, 52, and 66. Parity, immunosuppression, and use of oral contraception/intrauterine devices (IUDs) were identified as associated variables. The explanatory model had a sensitivity of 89.5% and a specificity of 73.8%. Conclusion: The predominant strains of HPV among Ecuadorian women are diverse. The risk of HPV infection is a complex phenomenon where biological and psychosocial variables are integrated into a model. In populations with limited access to health services, low socioeconomic status, and negative sociocultural beliefs about sexually transmitted infections (STIs), surveys can be used as a pre-screening step for HPV infections. The diagnostic value of the model should be tested in multicenter studies that include women from all over the country.

Academic Burnout, Family Functionality, Perceived Social Support and Coping among Graduate Students during the COVID-19 Pandemic.

Academic burnout and the COVID-19 pandemic have greatly impacted the academic life and mental health of graduate students. This study aims to address the mental health issue in graduate students by relating it to family functionality, perceived social support, and coping with academic burnout during the COVID-19 pandemic. Data were gathered from a cross-sectional study with 519 graduate students across universities in Hungary and other European countries. The Copenhagen Burnout Inventory Student, Family APGAR Index, the brief form of the Perceived Social Support Questionnaire, and the Brief Resilient Coping Scale were used to measure academic burnout, family functionality, perceived social support, and coping, respectively. Structural equations modeling was used for statistical analysis. The results revealed a negative effect of family functionality, perceived social support, and coping on academic burnout. The inverse relationship between perceived social support and the Copenhagen Burnout Inventory was identified, and mediated by coping and family functionality. These findings may offer patterns and predictors for future graduate students and higher-education institutions to identify outside factors that are implicated in academic burnout, especially in outbreaks such as the COVID-19 pandemic.

Academic burnout among master and doctoral students during the COVID-19 pandemic.

The COVID-19 outbreak has had an immense impact on academic life and public health. Graduate students had experienced obligatory curfews and quarantines due to the COVID-19 outbreak directly impacting their mental health and triggering academic burnout. In this cross-sectional study, we address the issue of mental health in graduate students by relating it to the factors associated with burnout syndrome during the COVID-19 pandemic. A total of 519 graduate students from master's and Ph.D./DLA degrees across universities in Hungary and other European countries participated in this study. The Copenhagen burnout inventory student version was used to evaluate burnout syndrome as an outcome. Our findings displayed burnout significantly lower among graduate students who had good sleep quality, receive high levels of support from their university, and were satisfied with how their university dealt with the pandemic. The excessive consumption of alcohol, the use of antidepressants, being single, and thinking about dropping out showed as predictive factors of burnout. The results add to emergent evidence on the impact of the COVID-19 pandemic on mental health and the predicted factors of academic burnout among master and doctoral students.

Depressive symptoms among older adults with diabetes mellitus: a cross-sectional study

ABSTRACT BACKGROUND: Diabetes mellitus is a chronic disease with long-term consequences that is often associated with depressive symptoms. This relationship predicts increased morbidity and mortality rates, leading to serious health consequences. OBJECTIVE: To identify the prevalence and health factors associated with depressive symptoms among older adults with diabetes mellitus. DESIGN AND SETTING: An observational cross-sectional study was conducted among 236 older adults in the Basic Healthcare Units of Jequié, Brazil. METHODS: A survey containing sociodemographic, behavioral, and health conditions was used as a data collection instrument, in addition to the Geriatric Depression Scale. The main inclusion criterion was older adults diagnosed with diabetes mellitus. To identify the risk factors associated with depressive symptoms among older adults with diabetes mellitus, logistic regression analysis was conducted for calculating the odds ratio (OR), and a 95% confidence interval (CI) was considered statistically significant. RESULTS: The prevalence of depressive symptoms was 24.2% among older adults with diabetes, corroborating the Brazilian average of 30%. The final multivariate analysis model for the risk of depressive symptoms showed a significant association with diabetes complications [OR = 2.50, 95% CI 1.318-4.74)] and osteoporosis [OR = 2.75, 95% CI 1.285-5.891)]. CONCLUSION: A high prevalence of depressive symptoms was observed among older adults with diabetes. Critically examining older adults with diabetes mellitus is necessary, and screening for depressive symptoms is highly recommended, especially for those with complications resulting from diabetes mellitus and musculoskeletal comorbidities, such as osteoporosis, as it seems to be associated with depressive symptoms.

Depressive symptoms among older adults with diabetes mellitus: a cross-sectional study.

BACKGROUND: Diabetes mellitus is a chronic disease with long-term consequences that is often associated with depressive symptoms. This relationship predicts increased morbidity and mortality rates, leading to serious health consequences. OBJECTIVE: To identify the prevalence and health factors associated with depressive symptoms among older adults with diabetes mellitus. DESIGN AND SETTING: An observational cross-sectional study was conducted among 236 older adults in the Basic Healthcare Units of Jequié, Brazil. METHODS: A survey containing sociodemographic, behavioral, and health conditions was used as a data collection instrument, in addition to the Geriatric Depression Scale. The main inclusion criterion was older adults diagnosed with diabetes mellitus. To identify the risk factors associated with depressive symptoms among older adults with diabetes mellitus, logistic regression analysis was conducted for calculating the odds ratio (OR), and a 95% confidence interval (CI) was considered statistically significant. RESULTS: The prevalence of depressive symptoms was 24.2% among older adults with diabetes, corroborating the Brazilian average of 30%. The final multivariate analysis model for the risk of depressive symptoms showed a significant association with diabetes complications [OR = 2.50, 95% CI 1.318-4.74)] and osteoporosis [OR = 2.75, 95% CI 1.285-5.891)]. CONCLUSION: A high prevalence of depressive symptoms was observed among older adults with diabetes. Critically examining older adults with diabetes mellitus is necessary, and screening for depressive symptoms is highly recommended, especially for those with complications resulting from diabetes mellitus and musculoskeletal comorbidities, such as osteoporosis, as it seems to be associated with depressive symptoms.

A critical review of traditional and advanced characterisation tools to drive formulators towards the rational development of 3D printed oral dosage forms.

The high degree of precision and control of 3D printing has given formulators the autonomy to engineer sophisticated and personalised medicines, starting a revolution in pharmaceutics. In addition, dosage forms with tailored drug release profile can be produced by changing some parameters of the 3D printing processes. Therefore, 3D printed medicines must be characterised in an orthogonal approach, to establish their physicochemical and biopharmaceutical features, and consequently to understand how these characteristics can be customised by changing the formulation and process parameters to ensure medicines' safety and efficacy. Given the recent regulation and commercialisation of 3D printed medicines, several methods and techniques have been transposed from official compendia; however, formulators must still make a critical assessment of their practical implications. A comprehensive review of the findings obtained by the characterisation of 3D printed oral dosage forms using traditional and advanced techniques is therefore presented here, to drive formulators towards a rational pharmaceutical development pathway. The characterisation methods have been classified in terms of their physicochemical or biopharmaceutical character. Interestingly, beyond the rise of modern characterisation techniques, the reassessment of data obtained by traditional methods has provided knowledge and a solid foundation to support the evolution of 3D printing techniques in pharmaceutics.

Ivermectin: recent approaches in the design of novel veterinary and human medicines.

Ivermectin (IVM) is a drug widely used in veterinary and human medicine for the management of parasitic diseases. Its repositioning potential has been recently considered for the treatment of different diseases, such as cancer and viral infections. However, IVM faces some limitations to its formulations due to its low water solubility and bioavailability, along with reports of drug resistance. In this sense, novel technological approaches have been explored to optimize its formulations and/or to develop innovative medicines. Therefore, this review discusses the strategies proposed in the last decade to improve the safety and efficacy of IVM and to explore its novel therapeutic applications. Among these technologies, the use of micro/nano-drug delivery systems is the most used approach, followed by long-acting formulations. In general, the development of these novel formulations seems to run side by side in veterinary and human health, showing a shared interface between the two areas. Although the technologies proposed indicate a promising future in the development of innovative dosage forms containing IVM, its safety and therapeutic targets must be further evaluated. Overall, these approaches comprise tailoring drug delivery profiles, decreasing the risks of developing drug resistance, and supporting the application of IVM for reaching different therapeutic targets.

Características y usabilidad de dispositivos de geolocalización en personas mayores: una revisión de alcance

Introducción: Actualmente el desarrollo, aplicación y uso de las nuevas tecnologías vinculadas a la salud es un campo emergente. En la actualidad no existe una revisión que sintetice la información sobre características y usabilidad de geolocalizadores en personas mayores. Objetivo: Sintetizar la evidencia existente sobre las características y usabilidad de dispositivos de geolocalización en personas mayores. Metodología: Se realizó la búsqueda de artículos científicos en las bases de datos: Medline vía PubMed, Lilacs y Google Scholar que cumplieran con los criterios de elegibilidad, entre el 1 de agosto de 2018 hasta el 30 de noviembre de 2020, y se seleccionó 11 documentos. Para la identificación de artículos se utilizó las palabras clave "Geolocalizador", "elderly", "aged" y "older adults". Resultados: La edad promedio de las personas participantes fue de 60,5, predominaron los estudios en género femenino, la población residía en su mayoría (63 %) en la comunidad y el 36,6 % padecía algún trastorno cognitivo. En cuanto a las características de los geolocalizadores, el 72 % de los dispositivos tiene un alcance de radio urbano y el 54 % tiene un costo bajo o gratuito en su implementación o ejecución. Conclusión: Esta revisión caracterizó los dispositivos de geolocalización y su uso en personas mayores en cuanto a su radio de alcance, costo, objetivos de intervención y población objetivo. Estos resultados podrían ser útiles para futuras investigaciones en el área de la gerontolocalización.

Introduction: Currently, the development, application, and use of new technologies related to health is an emerging field. As of right now, there is no review that synthesizes information on the characteristics and usability of geolocators in older adults. Objective: To synthesize the existing evidence on the characteristics and usability of geo-location devices in the elderly. Methodology: A search was made for scientific articles in the databases: Medline via Pub-Med, Lilacs, and Google Scholar that meet the eligibility criteria, between the date of August 1, 2018 to November 30, 2020, selecting 11 documents. For the identification of articles, the keywords "Geolocator", "elderly", "aged", and "older adults" were used. Results: The average age of the participants was 60.5, female studies predominated, most of the population (63%) resided in a community, and 36.6% suffered from a cognitive disorder. Regarding the characteristics of the geolocators, 72% of the devices have an urban radio range, and 54% have a low or free cost in their implementation or execution. Conclusion: This review characterized geolocation devices and their use in older adults in terms of their scope, cost, intervention objectives, and target population. These results could be useful for future research in the area of gerontolocation.

Preclinical studies of the antitumor effect of curcumin-loaded polymeric nanocapsules: A systematic review and meta-analysis.

Curcumin, a plant-derived compound, has various well-known biological effects (anti-inflammatory, antioxidant, antitumor, among others) as well as some important limitations for formulators, such as poor water solubility and low oral bioavailability. Its nanoencapsulation is reported to overcome these drawbacks and to improve its in vivo efficacy. Here, data from preclinical in vivo studies evaluating the antitumor efficacy of curcumin-loaded polymeric nanocapsules are collected, analyzed, and discussed as a systematic review. Meta-analyses are performed to assess the contribution of this nanoencapsulation compared with nonencapsulated curcumin. Eighteen studies (116 animals) meet the inclusion criteria. The evidence that curcumin-loaded polymeric nanocapsules inhibits tumor growth (SMD: -3.03; 95% CI: -3.84, -2.21; p < 0.00001) and decreases tumor weight (SMD: -3.96; 95% CI: -6.22, -1.70; p = 0.0006) in rodents is established, regardless of the solid tumor model. To assess the quality of the studies included in the review a bias risk analysis was performed using the SYRCLE's RoB tool. Therefore, encapsulation in polymeric nanocapsules represents an important tool to improve the antitumor effects of curcumin, and this systematic review paves the way for future clinical studies and the translation of curcumin formulations into novel nanomedicines for human cancer treatment.

Safety and Efficacy of the Therapeutic Use of Cannabis-Based Products in the Treatment of Dogs: An Integrative Review.

The use of cannabis-based products for therapeutic purposes is a reality in the field of animal health. However, although cannabis is considered safe when appropriately used by human patients, cannabis-based products can pose a risk to companion animals such as dogs, depending on their composition or route of administration. Thus, this article discusses aspects of the safety and efficacy of different cannabis-based products in dogs' treatment through an integrative review. The review was systematically performed in Medline (via Pubmed®) and Latin American and Caribbean Health Sciences Literature (LILACS) databases, with period restriction (between 1990 and 2021). The qualified articles (n=19), which met the previously established inclusion criteria, were critically evaluated. Based on the literature review, it is possible to infer safety in the administration of cannabis-based products for the treatment of dogs, especially products rich in cannabidiol (CBD), free or with low concentrations of tetrahydrocannabinol, under the conditions evaluated. In addition, CBD products potentially promote improved quality of life and reduce pain perception in animals affected by canine osteoarthritis. Finally, owing to the lack of large-scale and robust clinical research studies, the performance of clinical trials, considering the individual characteristics of each cannabis-based product (composition, concentration, nature of adjuvants, dosage form, route of administration), is strongly encouraged.

Topiramate-chitosan nanoparticles prevent morphine reinstatement with no memory impairment: Dopaminergic and glutamatergic molecular aspects in rats.

Besides their clinical application, chronic misuse of opioids has often been associated to drug addiction due to their addictive properties, underlying neuroadaptations of AMPA glutamate-receptor-dependent synaptic plasticity. Topiramate (TPM), an AMPAR antagonist, has been used to treat psychostimulants addiction, despite its harmful effects on memory. This study aimed to evaluate the effects of a novel topiramate nanosystem on molecular changes related to morphine reinstatement. Rats were previously exposed to morphine in conditioned place preference (CPP) paradigm and treated with topiramate-chitosan nanoparticles (TPM-CS-NP) or non-encapsulated topiramate in solution (S-TPM) during CPP extinction; following memory performance evaluation, they were re-exposed to morphine reinstatement. While morphine-CPP extinction was comparable among all experimental groups, TPM-CS-NP treatment prevented morphine reinstatement, preserving memory performance, which was impaired by both morphine-conditioning and S-TPM treatment. In the NAc, morphine increased D1R, D2R, D3R, DAT, GluA1 and MOR immunoreactivity. It also increased D1R, DAT, GluA1 and MOR in the dorsal hippocampus. TPM-CS-NP treatment decreased D1R, D3R and GluA1 and increased DAT in the NAc, decreasing GluA1 and increasing D2 and DAT in the dorsal hippocampus. Taken together, we may infer that TPM-CS-NP treatment was able to prevent the morphine reinstatement without memory impairment. Therefore, TPM-CS-NP may be considered an innovative therapeutic tool due to its property to prevent opioid reinstatement because it acts modifying both dopaminergic and glutamatergic neurotransmission, which are commonly related to morphine addiction.

A liquid chromatography coupled to quadrupole-time-of-flight-mass spectrometry (LC-QTOF-MS) method for identification analysis of saponins from Quillaja saponaria bark extracts in foot-and-mouth disease vaccines: Development, validation and applicability.

Saponins from Quillaja saponaria have been commonly used as immunomodulatory adjuvants in foot-and-mouth disease vaccines (FMDVs). However, due to the lack of consensus over the possible exacerbation of local inflammatory responses in cattle and its economic impacts, their use has been discouraged by Brazilian authorities. A qualitative method intended to determine the presence of saponins from Q. saponaria bark extracts in FMDVs was developed and validated. Instrumental analysis was performed using an liquid chromatography (LC) coupled to a quadrupole-time-of-flight-mass spectrometry (TOF-MS) system. The method was validated according to the International Conference on Harmonization Harmonized Tripartite Guideline Q2 (R1) and Brazilian Ministry of Agriculture, Livestock and Food Supply Analytical Quality Assurance Guidelines. Validation parameters were determined and considered suitable to the established criteria. The validated method has been applied in routine analysis in the National Agricultural Laboratory at Rio Grande do Sul (LANAGRO-RS). All results obtained were in agreement with the vaccine's composition described by the manufacturer. The method is easy and adequate for analysis in routine laboratories. To the best of the authors' knowledge, this is the first report of a method which intends to investigate the presence of saponins from Q. saponaria bark extracts in veterinary vaccines.

A aprendizagem do modelo de Criação de Jogos na formação inicial em um curso superior de Educação Física / The learning of the student-designed games model in the initial formation of a Physical Education course / El aprendizaje del modelo de creación de juegos en la formación inicial en un curso superior de Educación Física

O presente estudo analisou a aprendizagem do modelo de criação de jogos no ensino superior. Na educação física, a criação de jogos refere-se ao processo no qual alunos criam e praticam seus pró- prios jogos com auxílio do professor. A unidade de criação de jogos foi implementada com 45 alunos de um curso superior de Educação Física. O estudo de caso analisou: i) as impressões dos alunos; ii) as aprendi- zagens a partir do modelo; iii) as aspirações de utilizar essa metodolo- gia em sua prática profissional. Os resultados apontaram que os alunos demonstraram interesse: pela metodologia; pela aprendizagem sobre a classificação de jogos, a compreensão holística do jogo e a metodologia de criação de jogos; demonstraram, ainda, querer usar a metodologia para criar outras atividades e para oferecer um conteúdo significativo aos seus futuros alunos.

The present study analyzed the learning of the student-designed games (SDG) model in higher education. In physical education, SDG refer to the process in which students create and practice their own games with the teacher's support. The SDG unit was implemented with 45 undergrads from a physical education course. The case study analyzed: i) students' perceptions; ii) students' learning; iii) aspirations to use this methodology in their professional practice. The results showed that: students showed an interest in the methodology; students learned about game classification, game appreciation, and SDG methodology; the students also demonstrated that they wanted to use the methodology to create other activities and to offer meaningful content to their future students.

El presente estudio analizó el aprendizaje del modelo de creación de juegos en la enseñanza superior. En la educación física, la creación de juegos se refiere al proceso en que los alumnos crean y practican sus propios juegos con ayuda del profesor. La unidad de creación de juegos fue implementada con 45 alumnos de un curso superior de educación física. El estudio de caso analizó: i) las impresiones de los alumnos; ii) los aprendizajes de los alumnos; iii) las aspiraciones en utilizar esa metodología en su práctica profesional. Los resultados apuntaron que: los alumnos demostraron interés por la metodología; el aprendizaje sobre la clasificación de juegos, la comprensión holística del juego, y la metodología de creación de juegos; los alumnos también demostraron querer utilizar la metodología para crear otras actividades y para ofrecer un contenido significativo a sus futuros alumnos.

Liquid chromatography method to assay tretinoin in skin layers: validation and application in skin penetration/retention studies.

A liquid chromatography (LC) method for the quantification of tretinoin (TTN) in different matrices (adhesive tape, cotton and porcine skin layers, stratum corneum, viable epidermis, and dermis) was validated and applied in in vitro porcine skin penetration/retention studies. This study proposes, for the first time, a method for assaying TTN in separated porcine skin layers (stratum corneum, viable epidermis, and dermis). The skin studies were carried out using tape stripping and cutaneous retention techniques. The procedures for the extraction of TTN from dermatological formulations (creams and gels) and biological and non-biological matrices used with the tape stripping and retention techniques were also evaluated. The LC method consisted of a mobile phase composed of a mixture of methanol, water, and glacial acetic acid (85:15:1, v/v); a C18 column used as the stationary phase; a flow rate of 1.0 mL min-1; an injection volume of 100 µL; and TTN detection at 342 nm. The method was linear in the range of 0.05-15.00 µg mL-1 (r = 0.9999), and it was precise and accurate. The limit of detection (LOD) and limit of quantification (LOQ) were 0.0165 µg mL-1 and 0.0495 µg mL-1, respectively. TTN was extracted from different matrices, showing good precision [relative standard deviation (RSD) of <5%] and accuracy (89.4-113.9%). This method was successfully applied in the evaluation of TTN skin retention/permeation from dermatological formulations (cream and gel). A higher penetration of TTN through the skin was achieved with the gel rather than the cream, showing the influence of the dosage form. Therefore, the developed method can easily be applied in porcine skin penetration/retention studies of dermatological formulations containing TTN, and it is able to discriminate the behaviours of the different formulations.

Metabolite Fruit Profile Is Altered in Response to Source-Sink Imbalance and Can Be Used as an Early Predictor of Fruit Quality in Nectarine.

Peaches and nectarines [Prunus persica (L.) Batsch] are among the most exported fresh fruit from Chile to the Northern Hemisphere. Fruit acceptance by final consumers is defined by quality parameters such as the size, weight, taste, aroma, color, and juiciness of the fruit. In peaches and nectarines, the balance between soluble sugars present in the mesocarp and the predominant organic acids determines the taste. Biomass production and metabolite accumulation by fruits occur during the different developmental stages and depend on photosynthesis and carbon export by source leaves. Carbon supply to fruit can be potentiated through the field practice of thinning (removal of flowers and young fruit), leading to a change in the source-sink balance favoring fruit development. Thinning leads to fruit with increased size, but it is not known how this practice could influence fruit quality in terms of individual metabolite composition. In this work, we analyzed soluble metabolite profiles of nectarine fruit cv "Magique" at different developmental stages and from trees subjected to different thinning treatments. Mesocarp metabolites were analyzed throughout fruit development until harvest during two consecutive harvest seasons. Major polar compounds such as soluble sugars, amino acids, organic acids, and some secondary metabolites were measured by quantitative 1H-NMR profiling in the first season and GC-MS profiling in the second season. In addition, harvest and ripening quality parameters such as fruit weight, firmness, and acidity were determined. Our results indicated that thinning (i.e., source-sink imbalance) mainly affects fruit metabolic composition at early developmental stages. Metabolomic data revealed that sugar, organic acid, and phenylpropanoid pathway intermediates at early stages of development can be used to segregate fruits impacted by the change in source-sink balance. In conclusion, we suggest that the metabolite profile at early stages of development could be a metabolic predictor of final fruit quality in nectarines.