MestreChef nutritional game: an alternative method to promote nutrition facts label reading in obesity outreach activities.

Reading nutrition facts labels is a competency for which training is given in several nutrition education programs, especially in obesity outreach workshops. The Top Trumps-style card game is commonly used in obesity prevention educational programs to engage participants in reading nutrition facts labels; however, the success of TV cooking shows among children and teenagers has not been explored for educational purposes. This paper is a descriptive study of developing a gamified activity as part of the one-time outreach workshop facilitated by the Obesity and Comorbidities Research Center (OCRC) in Brazil. By playing the MestreChef Nutritional (MCN) game, participants followed similar rules as the corresponding TV cooking show. They were challenged to decide to select food items, calculate dietary food intake, and prepare a recipe to visualize the proportion of macronutrients contained in daily diets. The analysis of the nutritional dietary table completed by participants revealed to be a rich source of information, and we identified in our cohort that selecting an adequate number of food items and making healthy food choices was not concerning. However, their lack of competency in performing mathematical reasoning, particularly in calculating serving sizes and converting grams of macronutrients into calories, was evident. Moreover, facilitators of the workshops agreed that the MCN game presents definitively more didactic effectiveness and playability than the Foods Top Trumps, a former game used in the outreach workshops. The MCN game nourishes the engagement of the participants in learning nutrition-related concepts and may be an efficient didactic resource to improve nutrition knowledge in outreach activities when an alternative method is required to stimulate reading nutrition facts labels.NEW & NOTEWORTHY Reading nutrition facts labels is a typical activity promoted in obesity prevention educational programs. By playing the MestreChef Nutritional, participants can immerse in the context of a food TV show game to have the first contact with reading nutrition facts labels for a learning purpose. However, the game can reveal the participant's limitations in mathematical reasoning despite the didactic potential of the game in promoting obesity-related physiology concepts.

The presidential election of the human body: applying contextual learning to promote connections between the student and the curricular content.

Using real-world situations to engage students in learning specific content is advocated by educational research as an effective strategy. However, motivating students to establish personal and emotional connections with the curricular content is challenging. We presented a didactic strategy named "the presidential election of the human body," created to use the presidential election context to engage students in studying cell function and structure using role-playing and appropriation of scientific concepts. Four groups of students (n = 124) of the science and mathematics teacher training program chose a cell of the human body to impersonate, they studied the biology of their cell, and they ran in a presidential election campaign. They created slogans, videos, and materials for their campaign, and on the day of the election the group of students voted for the best slogan. The didactic strategy was capable of stimulating the appropriation of the characteristics of the cells they represented. The majority (75%) of the elected candidates represented cells that are linked to the nervous system. Musicality and humor were the most frequent styles that appeared in the slogans. Students strongly agreed that they enjoyed the activity and considered it valuable for contextualizing the learning of anatomy and physiology. Thus, the activity is a didactic resource to stimulate the students to embrace the content they are learning in the contextualized momentum of a presidential election.

Smartphone-assisted experimentation as a didactic strategy to maintain practical lessons in remote education: alternatives for physiology education during the COVID-19 pandemic.

Online and distance education may be dismissed by educators who argue that these methods are not equivalent to traditional face-to-face education due to the lack of laboratory classes. However, smartphone-assisted experimentation is an innovative and powerful didactic tool that helps educators in the teaching process of physiology, particularly in situations with a lack of financial support for purchasing laboratory equipment, or lack of support for homework and assignments, distance learning courses, and emergency remote education, such as during the COVID-19 pandemic. Therefore, we present the concept of the mobile learning laboratory (MobLeLab), which is a collection of smartphone applications that allow scientific data collection, such as physiological variables, for educational purposes. The three types of MobLeLabs (simulators, built-in, and plug-in) are presented, as well as ideas on how to use smartphone sensors to collect physiological data. Additionally, we elaborate on the principles of the protocols for physiology education with MobLeLabs and discuss their importance to fostering scientific method reasoning by students.

Workshop report: "Using Social Media and Smartphone Applications in Practical Lessons to Enhance Student Learning" in Búzios, Brazil (August 6-8, 2017).

Cost-effective student engagement poses a challenge for instructors, especially those who may not be familiar with new technologies and mobile devices. In this workshop, participants, experienced and discussed two ways of using smartphones in physiology classes: to engage in an online learning environment for discussions, and to make physiological measurements. Participants signed up for individual Twitter accounts and learned how to tweet, retweet, message, use a URL shortener, and use hashtags. They then went on to locate articles on an assigned topic from the Twitter accounts of credible science sources ( American Journal of Physiology, The Scientist, CDC.gov, WHO.int) and applied their Twitter skills to discuss the science topic of current interest. Additionally, participants shared their knowledge about the use of smartphones as a tool for teaching; they discussed the foundations of smartphone-assisted learning and the concept of mobile-learning laboratories, which we refer to as MobLeLabs. Participants also performed an experiment that used an Axé dance video and smartphone applications to measure changes in heart rate and reaction time. Our report describes this international hands-on teaching workshop and highlights its outcomes.

Cardiac rhythm dance protocol: a smartphone-assisted, hands-on activity to introduce concepts of cardiovascular physiology and scientific methodology.

Physiology teaching resources have advanced to include innovative pedagogical approaches that meet the learning expectations of the current generation of students, while at the same time ensuring content delivery is accurate and the use of technologies is appropriate. We developed a quick experimental assay protocol to introduce the basic concepts of cardiac rhythms, and to demonstrate simultaneously that smartphone applications are a reliable and cost-effective tool for data collection in teaching the scientific method and performing physiology activities. The cardiac rhythm dance (CRD) protocol engages students in dancing a cardiac cyclelike movement to the rhythm of classical, pop, and samba music, and measuring their own cardiac frequency. Students collected their own data using the app Instant Heart Rate (Azumio). The CRD protocol allowed students to conclude that cardiac cycle-like movements paced by a pop song could represent the normal cardiac rhythm, whereas a classical song induced a significant reduction of heart rate, and the samba song significantly increased heart rate compared with the pop song. After group discussion, students considered that the pop rhythm is more realistic of day-by-day movement rhythms and is equivalent to the steady state of daily cardiac rhythms. Students considered the bradycardic and tachycardic movements to the dancing performed to the classical and samba rhythms, respectively. Thus the CRD protocol provides a multiple sensory-based and active learning resource that can engage students in learning cardiovascular physiology and recognizes smartphones as scientific instruments for collecting data during hands-on activities.

Selective regulation of hepatic lipid metabolism by the AMP-activated protein kinase pathway in late-pregnant rats.

The liver plays an essential role in maternal metabolic adaptation during late pregnancy. With regard to lipid metabolism, increased secretion of very low-density lipoprotein (VLDL) is characteristic of late pregnancy. Despite this well-described metabolic plasticity, the molecular changes underlying the hepatic adaptation to pregnancy remain unclear. As AMPK is a key intracellular energy sensor, we investigated whether this protein assumes a causal role in the hepatic adaptation to pregnancy. Pregnant Wistar rats were treated with vehicle or AICAR (5-aminoimidazole-4-carboxamide ribonucleotide) for 5 days starting at gestational day 14. At the end of treatment, the rats were subjected to an intraperitoneal pyruvate tolerance test and in situ liver perfusion with pyruvate. The livers were processed for Western blot analysis, quantitative PCR, thin-layer chromatography, enzymatic activity, and glycogen content measurements. Blood biochemical profiles were also assessed. We found that AMPK and ACC phosphorylation were reduced in the livers of pregnant rats in parallel with a reduced level of hepatic gluconeogenesis of pyruvate. This effect was accompanied by both a reduction in the levels of hepatic triglycerides (TG) and an increase in circulating levels of TG. Treatment with AICAR restored hepatic levels of TG to those observed in nonpregnant rats. Additionally, AMPK activation reduced the upregulation of genes related to VLDL synthesis and secretion observed in the livers of pregnant rats. We conclude that the increased secretion of hepatic TG in late pregnancy is concurrent with a transcriptional profile that favors VLDL production. This transcriptional profile results from the reduction in hepatic AMPK activity.

Melatonin acts through MT1/MT2 receptors to activate hypothalamic Akt and suppress hepatic gluconeogenesis in rats.

Melatonin can contribute to glucose homeostasis either by decreasing gluconeogenesis or by counteracting insulin resistance in distinct models of obesity. However, the precise mechanism through which melatonin controls glucose homeostasis is not completely understood. Male Wistar rats were administered an intracerebroventricular (icv) injection of melatonin and one of following: an icv injection of a phosphatidylinositol 3-kinase (PI3K) inhibitor, an icv injection of a melatonin receptor (MT) antagonist, or an intraperitoneal (ip) injection of a muscarinic receptor antagonist. Anesthetized rats were subjected to pyruvate tolerance test to estimate in vivo glucose clearance after pyruvate load and in situ liver perfusion to assess hepatic gluconeogenesis. The hypothalamus was removed to determine Akt phosphorylation. Melatonin injections in the central nervous system suppressed hepatic gluconeogenesis and increased hypothalamic Akt phosphorylation. These effects of melatonin were suppressed either by icv injections of PI3K inhibitors and MT antagonists and by ip injection of a muscarinic receptor antagonist. We conclude that melatonin activates hypothalamus-liver communication that may contribute to circadian adjustments of gluconeogenesis. These data further suggest a physiopathological relationship between the circadian disruptions in metabolism and reduced levels of melatonin found in type 2 diabetes patients.

Real-Lab-Day: undergraduate scientific hands-on activity as an authentic learning opportunity in microbiology education.

Traditional lab classes in microbiology are common in several educational institutions, which can provide a learning experience disconnected from the myriad of experiments performed in research laboratories. Attempting to promote an authentic learning opportunity of the functioning of a bacteriology research laboratory, we developed the "Real-Lab-Day," a multimodal learning experience to develop competencies, abilities, critical analysis, and teamwork skills for undergraduate students. Students were divided into groups and assigned to research laboratories to be mentored by graduate students, to design and carry out scientific assays. Undergraduate students were introduced to methods such as cellular and molecular assays, flow cytometry, and fluorescence microscopy, as tools to address scientific questions about bacterial pathogenicity, bacterial resistance, and other topics. To consolidate their learning, students created and presented a poster in a rotational panel of peer learning. The perceived learning and interest in microbiology research were improved by the Real-Lab-Day experience, and >95% of the students approved the Real-Lab-Day as a teaching tool in microbiology. Students exposed to a research laboratory had a positive experience with the teaching method, and over 90% saw it as beneficial to improve their understanding of the scientific concepts discussed during lectures. Likewise, their interest in pursuing a career in microbiology was stimulated by the Real-Lab-Day experience. In conclusion, this educational initiative depicts an alternative methodology to connect students to the research and offers an opportunity to be in close contact with experts and graduate students, who gain teaching experience.

UPR induces transient burst of apoptosis in islets of early lactating rats through reduced AKT phosphorylation via ATF4/CHOP stimulation of TRB3 expression.

Endocrine pancreas from pregnant rats undergoes several adaptations that comprise increase in ß-cell number, mass and insulin secretion, and reduction of apoptosis. Lactogens are the main hormones that account for these changes. Maternal pancreas, however, returns to a nonpregnant state just after the delivery. The precise mechanism by which this reversal occurs is not settled but, in spite of high lactogen levels, a transient increase in apoptosis was already reported as early as the 3rd day of lactation (L3). Our results revealed that maternal islets displayed a transient increase in DNA fragmentation at L3, in parallel with decreased RAC-alpha serine/threonine-protein kinase (AKT) phosphorylation (pAKT), a known prosurvival kinase. Wortmannin completely abolished the prosurvival action of prolactin (PRL) in cultured islets. Decreased pAKT in L3-islets correlated with increased Tribble 3 (TRB3) expression, a pseudokinase inhibitor of AKT. PERK and eIF2α phosphorylation transiently increased in islets from rats at the first day after delivery, followed by an increase in immunoglobulin heavy chain-binding protein (BiP), activating transcription factor 4 (ATF4), and C/EBP homologous protein (CHOP) in islets from L3 rats. Chromatin immunoprecipitation (ChIP) and Re-ChIP experiments further confirmed increased binding of the heterodimer ATF4/CHOP to the TRB3 promoter in L3 islets. Treatment with PBA, a chemical chaperone that inhibits UPR, restored pAKT levels and inhibited the increase in apoptosis found in L3. Moreover, PBA reduced CHOP and TRB3 levels in ß-cell from L3 rats. Altogether, our study collects compelling evidence that UPR underlies the physiological and transient increase in ß-cell apoptosis after delivery. The UPR is likely to counteract prosurvival actions of PRL by reducing pAKT through ATF4/CHOP-induced TRB3 expression.

The case of thyroid hormones: how to learn physiology by solving a detective case.

Thyroid diseases are prevalent among endocrine disorders, and careful evaluation of patients' symptoms is a very important part in their diagnosis. Developing new pedagogical strategies, such as problem-based learning (PBL), is extremely important to stimulate and encourage medical and biomedical students to learn thyroid physiology and identify the signs and symptoms of thyroid dysfunction. The present study aimed to create a new pedagogical approach to build deep knowledge about hypo-/hyperthyroidism by proposing a hands-on activity based on a detective case, using alternative materials in place of laboratory animals. After receiving a description of a criminal story involving changes in thyroid hormone economy, students collected data from clues, such as body weight, mesenteric vascularization, visceral fat, heart and thyroid size, heart rate, and thyroid-stimulating hormone serum concentration to solve the case. Nevertheless, there was one missing clue for each panel of data. Four different materials were proposed to perform the same practical lesson. Animals, pictures, small stuffed toy rats, and illustrations were all effective to promote learning, and the detective case context was considered by students as inviting and stimulating. The activity can be easily performed independently of the institution's purchasing power. The practical lesson stimulated the scientific method of data collection and organization, discussion, and review of thyroid hormone actions to solve the case. Hence, this activity provides a new strategy and alternative materials to teach without animal euthanization.

Outbreak! An Online Board Game That Fosters Collaborative Learning of Viral Diseases.

Remote education has become necessary to resume teaching activities during the pandemic. Most educators were not prepared for this type of teaching or did not have access to the resources required for online classes. Taking advantage of the sudden interest in the microbial world, we developed Outbreak!, a board game that can be used to support hybrid teaching, focusing on transmission and symptoms caused by viral diseases. We used the engaging potential of cooperative board games to provoke an enriching debate about the roles of both researchers and health workers during an outbreak. Educators in developing countries are in desperate need of creative and accessible tools during this unprecedented crisis. We believe Outbreak! can be a useful and fun tool.

Comparison of hybrid learning and remote education in the implementation of the "Adopt a Microorganism" methodology.

The Internet has changed the way teachers and students access information and build knowledge. The recent COVID-19 pandemic has created challenges for both teachers and students and a demand for new methodologies of remote learning. In the life sciences, mixing online content with practical activities represents an even greater challenge. In microbiology, the implementation of an active teaching methodology, the #Adopt project, based on the social network Facebook®, represents an excellent option for connecting remote education with classroom activities. In 2020, the version applied in high school, "Adopt a Microorganism", was adapted to meet the demands of emergency remote education owing to the suppression of face-to-face activities caused by the pandemic. In the present study, we assessed how the change in methodology impacted the discourse richness of students from high school integrated with technical education in the Business Administration program of the Federal Institute of São Paulo, Sorocaba Campus. Three questionnaires related to the groups of microorganisms (Archaea, Bacteria, Virus, Fungi, and Protozoan) were applied. The students' responses in the 2019 and 2020 classes were compared concerning content richness and multiplicity of concepts through the application of the Shannon diversity index, an approach that is generally used to assess biodiversity in different environments. The observed results suggest that remote learning provided students with a conceptual basis and richness of content equivalent to that achieved by students subjected to the hybrid teaching model. In conclusion, this study suggests that the #Adopt project methodology increases students' discourse richness in microbiology even without face-to-face traditional classes.

MKP-1 mediates glucocorticoid-induced ERK1/2 dephosphorylation and reduction in pancreatic ß-cell proliferation in islets from early lactating mothers.

Maternal pancreatic islets undergo a robust increase of mass and proliferation during pregnancy, which allows a compensation of gestational insulin resistance. Studies have described that this adaptation switches to a low proliferative status after the delivery. The mechanisms underlying this reversal are unknown, but the action of glucocorticoids (GCs) is believed to play an important role because GCs counteract the pregnancy-like effects of PRL on isolated pancreatic islets maintained in cell culture. Here, we demonstrate that ERK1/2 phosphorylation (phospho-ERK1/2) is increased in maternal rat islets isolated on the 19th day of pregnancy. Phospho-ERK1/2 status on the 3rd day after delivery (L3) rapidly turns to values lower than that found in virgin control rats (CTL). MKP-1, a protein phosphatase able to dephosphorylate ERK1/2, is increased in islets from L3 rats. Chromatin immunoprecipitation assay revealed that binding of glucocorticoid receptor (GR) to MKP-1 promoter is also increased in islets from L3 rats. In addition, dexamethasone (DEX) reduced phospho-ERK1/2 and increased MKP-1 expression in RINm5F and MIN-6 cells. Inhibition of transduction with cycloheximide and inhibition of phosphatases with orthovanadate efficiently blocked DEX-induced downregulation of phospho-ERK1/2. In addition, specific knockdown of MKP-1 with siRNA suppressed the downregulation of phospho-ERK1/2 and the reduction of proliferation induced by DEX. Altogether, our results indicate that downregulation of phospho-ERK1/2 is associated with reduction in proliferation found in islets of early lactating mothers. This mechanism is probably mediated by GC-induced MKP-1 expression.

Signal transducer and activator of transcription 3-regulated sarcoendoplasmic reticulum Ca2+-ATPase 2 expression by prolactin and glucocorticoids is involved in the adaptation of insulin secretory response during the peripartum period.

During pregnancy, the maternal endocrine pancreas undergoes, as a consequence of placental lactogens and prolactin (PRL) action, functional changes that are characterized by increased glucose-induced insulin secretion. After delivery, the maternal endocrine pancreas rapidly returns to non-pregnant state, which is mainly attributed to the increased serum levels of glucocorticoids (GCs). Although GCs are known to decrease insulin secretion and counteract PRL action, the mechanisms for these effects are poorly understood. We have previously demonstrated that signal transducer and activator of transcription 3 (STAT3) is increased in islets treated with PRL. In the present study, we show that STAT3 expression and serine phosphorylation are increased in pancreatic islets at the end of pregnancy (P19). STAT3 serine phosphorylation rapidly returned to basal levels 3 days after delivery (L3). The expression of the sarcoendoplasmic reticulum Ca(2+)-ATPase 2 (SERCA2), a crucial protein involved in the regulation of calcium handling in beta-cells, was also increased in P19, returning to basal levels at L3. PRL increased SERCA2 and STAT3 expressions and STAT3 serine phosphorylation in RINm5F cells. The upregulation of SERCA2 by PRL was abolished after STAT3 knockdown. Moreover, PRL-induced STAT3 serine phosphorylation and SERCA2 expression were inhibited by dexamethasone (DEX). Insulin secretion from islets of P19 rats pre-incubated with thapsigargin and L3 rats showed a dramatic suppression of first phase of insulin release. The present results indicate that PRL regulates SERCA2 expression by a STAT3-dependent mechanism. PRL effect is counteracted by DEX and might contribute to the adaptation of maternal endocrine pancreas during the peripartum period.

Prolonged fasting elicits increased hepatic triglyceride accumulation in rats born to dexamethasone-treated mothers.

We investigated the effect of dexamethasone during the last week of pregnancy on glucose and lipid metabolism in male offspring. Twelve-week old offspring were evaluated after fasting for 12-hours (physiological) and 60-hours (prolonged). Physiological fasting resulted in glucose intolerance, decreased glucose clearance after pyruvate load and increased PEPCK expression in rats born to dexamethasone-treated mothers (DEX). Prolonged fasting resulted in increased glucose tolerance and increased glucose clearance after pyruvate load in DEX. These modulations were accompanied by accumulation of hepatic triglycerides (TG). Sixty-hour fasted DEX also showed increased citrate synthase (CS) activity, ATP citrate lyase (ACLY) content, and pyruvate kinase 2 (pkm2), glucose transporter 1 (slc2a1) and lactate dehydrogenase-a (ldha) expressions. Hepatic AKT2 was increased in 60-hour fasted DEX, in parallel with reduced miRNAs targeting the AKT2 gene. Altogether, we show that metabolic programming by prenatal dexamethasone is characterized by an unexpected hepatic TG accumulation during prolonged fasting. The underlying mechanism may depend on increased hepatic glycolytic flux due to increased pkm2 expression and consequent conversion of pyruvate to non-esterified fatty acid synthesis due to increased CS activity and ACLY levels. Upregulation of AKT2 due to reduced miRNAs may serve as a permanent mechanism leading to increased pkm2 expression.

Excess iodide downregulates Na(+)/I(-) symporter gene transcription through activation of PI3K/Akt pathway.

Transcriptional mechanisms associated with iodide-induced downregulation of NIS expression remain uncertain. Here, we further analyzed the transcriptional regulation of NIS gene expression by excess iodide using PCCl3 cells. NIS promoter activity was reduced in cells treated for 12-24 h with 10(-5) to 10(-3) M NaI. Site-directed mutagenesis of Pax8 and NF-κB cis-acting elements abrogated the iodide-induced NIS transcription repression. Indeed, excess iodide (10(-3) M) excluded Pax8 from the nucleus, decreased p65 total expression and reduced their transcriptional activity. Importantly, p65-Pax8 physical interaction and binding to NIS upstream enhancer were reduced upon iodide treatment. PI3K/Akt pathway activation by iodide-induced ROS production is involved in the transcriptional repression of NIS expression. In conclusion, the results indicated that excess iodide transcriptionally represses NIS gene expression through the impairment of Pax8 and p65 transcriptional activity. Furthermore, the data presented herein described novel roles for PI3K/Akt signaling pathway and oxidative status in the thyroid autoregulatory phenomenon.

Polygodial, a sesquiterpene isolated from Drimys brasiliensis (Winteraceae), triggers glucocorticoid-like effects on pancreatic ß-cells.

Despite its common use, the synthetic glucocorticoid dexamethasone can cause several adverse effects, such as diabetes and insulin-related metabolic impairment. Thus, research on molecules that could provide the same anti-inflammatory response with milder side effects is constant. In this work the anti-inflammatory activity of the natural sesquiterpene polygodial, extracted from the endemic Brazilian plant Drimys brasiliensis Miers (Winteraceae), was investigated. Employing a pancreatic ß-cell model (INS 1E), the effect of polygodial on signaling pathways is similar to that caused by dexamethasone - both increased MKP1 and decreased ERK1/2 expression in a dose-response and time-dependent manner. Relating to such finding, nuclear translocation of the glucocorticoid receptor was also discovered to be induced by the sesquiterpene. Molecular modeling results indicated that polygodial was capable of docking to the glucocorticoid receptor, but presented preference for the Arg611 binding site rather than Thr739 when set to bind freely inside the pocket. At last, fragmentation of DNA was verified as consequence of sesquiterpene-induced cell death. Altogether, our results suggest that, like dexamethasone, polygodial interacts the glucocorticoid receptor ligand binding domain but create fewer ligand-protein interactions at the site, yielding a weaker effector response. Such property provides an advantage when regarding the adverse effects resulting from stronger affinity ligands of the glucocorticoid receptor, such as in the case of the current standard dexamethasone-based treatment. This aspect, also, turns polygodial an interesting hit compound to the development of new drugs based on its backbone structure providing less harmful anti-inflammatory treatments.

Frozen pulp extracts of camu-camu (Myrciaria dubia McVaugh) attenuate the hyperlipidemia and lipid peroxidation of Type 1 diabetic rats.

Several epidemiological and experimental studies demonstrate that modulation of inflammatory response and oxidative stress by natural phytochemicals is a promising strategy to prevent and treat many chronic inflammatory diseases. Camu-camu is an Amazonian fruit with a high content of antioxidants, especially phenolic compounds and vitamin C. In the present study we evaluated the in vivo effects of chronic ingestion of raw extracts derived from camu-camu (Myrciaria dubia McVaugh) frozen pulp on plasma lipid profile and oxidative stress in streptozotocin-induced diabetic rats. Oral administration of camu-camu raw extracts significantly increased plasma antioxidant activity, reduced triacylglycerol and total cholesterol and lipid peroxidation in the plasma of streptozotocin-induced diabetic rats. However, no effect was observed on glucose metabolism of diabetic rats, probably due to the severity of this model.