Neuroactive compounds in foods: Occurrence, mechanism and potential health effects

Association between smoking status and changes in health behaviours during the COVID-19 lockdown: a cross-sectional study in Israel

OBJECTIVES

To explore the association between smoking status (current vs former), changes in smoking habits (among current smokers only) and negative changes in dietary and physical activity habits during the initial COVID-19 lockdown in Israel.

DESIGN

A secondary analysis of an online cross-sectional study (6 April 2020 to 28 April 2020). Dependent variables included deteriorations in dietary habits score and odds of reporting worsening of physical activity habits during the first COVID-19 lockdown. The study analysed the association between these variables and 'smoking status' (current vs former) and, within smokers, changes in smoking habits, using multivariate logistic and linear regression models. For changes in physical activity habits, there was a significant interaction with baseline physical activity levels (p=0.04), therefore, analysis was stratified accordingly.

SETTING

Online data collection.

PARTICIPANTS

660 participants, current or former smokers in Israel, Hebrew speakers and ≥18 years old.

PRIMARY OUTCOMES

Self-reported negative changes in dietary habits and physical activity during the first COVID-19 lockdown.

RESULTS

The sample (n=660) included 66.2% (n=437) current smokers and 33.8% (n=223) former smokers. Among current smokers, 43.5% (n=190) indicated an increase in their smoking habits. Of all respondents, 25% (n=170) reported a negative dietary change and 48% (n=192) spent less time engaging in physical activity, with 66% (n=437) reporting increased levels of stress. No significant association was found between smoking status and the dietary habits score in the multivariate linear regression (B=-0.046, CI -0.493 to 0.401, reference group: former smokers). This indicates that being a current smoker was associated with a non-significant 0.046 point decrease in the dietary habits score compared with former smokers. Similarly, no significant association was found between smoking status and odds of reporting worsening of physical activity, even after stratifying by baseline physical activity levels. Among participants who currently smoke, no significant association was found between changes in smoking habits and the dietary habits score (B=0.391, 95% CI -0.061 to 0.843, p=0.090, reference group: those who smoke the same or less) or with odds of reporting worsening of physical activity (OR=1.16, 95% CI 0.688 to 1.956, p=0.577, reference group: those who smoke the same or less).

CONCLUSION

Among current and former smokers, high rates of negative health habit changes were found, emphasising the need for interventions during future crises. Smoking status and/or changes in smoking habits among current smokers were not associated with negative changes in dietary and physical activity habits.

Selective Electrochemical Biosensors for Tyrosinase and Tyramine via Enzyme-Mediated Oxidation Reaction

Tyrosinase, a copper-containing oxidase, holds promise as a critical biomarker for diverse skin-related infections and vitiligo and melanoma tumors. Beyond its role as a critical biomarker and in biological pigmentation, tyrosinase is also involved in the oxidation of biogenic amines such as tyramine. Tyramine as a tyrosinase substrate serves as a precursor in the synthesis of various neurotransmitters such as dopamine and norepinephrine and contributes to significant neurological processes. It is well-stated that tyrosinase could oxidize tyramine in the presence of oxygen to give dopamine as a product. The oxidation of tyramine by tyrosinase to produce dopamine has been widely applied in colorimetric and fluorimetric assays of tyramine and tyrosinase. Herein, we optimized and utilized this oxidation reaction for the effective electrochemical detection of tyramine and tyrosinase without any electrode modification for the first time. We achieved the selective detection of tyrosinase and tyramine via selective detection of dopamine in situ, generated from the enzymatic conversion of tyramine by tyrosinase. Tyrosinase and tyramine were detected by using cyclic voltammetry (CV) and square wave voltammetry (SWV). Both electrochemical biosensors demonstrated excellent analytical performance. CV offered linear detection ranges of 0.7-10 μg/mL and 5.0-100 μM for tyrosinase and tyramine, respectively, while SWV exhibited a notably low signal-to-noise ratio, resulting in enhanced sensitivity for the detection of tyrosinase (0.3-10 μg/mL and LOD of 0.29 μg/mL) and tyramine (1.0-100 μM and LOD of 0.69 μM). The simple and convenient biosensors successfully detected tyrosinase in human serum samples and tyramine in yogurt and human urine samples and are very promising for the detection of real samples.

Direct effects of remote ischemic preconditioning on post-exercise-induced changes in kynurenine metabolism

Purpose

Tryptophan (TRP) degradation through the kynurenine pathway is responsible for converting 95% of free TRP into kynurenines, which modulate skeletal muscle bioenergetics, immune and central nervous system activity. Therefore, changes in the kynurenines during exercise have been widely studied but not in the context of the effects of remote ischemic preconditioning (RIPC). In this study, we analyzed the effect of 14-day RIPC training on kynurenines and TRP in runners after running intervals of 20 × 400 m.

Methods

In this study, 27 semi-professional long-distance runners were assigned to two groups: a RIPC group performing 14 days of RIPC training (n = 12), and a placebo group, SHAM (n = 15). Blood was collected for analysis before, immediately after, and at 6 h and 24 h after the run.

Results

After the 14-day RIPC/SHAM intervention, post hoc analysis showed a significantly lower concentration of XANA and kynurenic acid to kynurenine ratio (KYNA/KYN) in the RIPC group than in the SHAM group immediately after the running test. Conversely, the decrease in serum TRP levels was higher in the RIPC population.

Conclusion

RIPC modulates post-exercise changes in XANA and TRP levels, which can affect brain health, yet further research is needed.

The Biology and Biochemistry of Kynurenic Acid, a Potential Nutraceutical with Multiple Biological Effects

Kynurenic acid (KYNA) is an antioxidant degradation product of tryptophan that has been shown to have a variety of cytoprotective, neuroprotective and neuronal signalling properties. However, mammalian transporters and receptors display micromolar binding constants; these are consistent with its typically micromolar tissue concentrations but far above its serum/plasma concentration (normally tens of nanomolar), suggesting large gaps in our knowledge of its transport and mechanisms of action, in that the main influx transporters characterized to date are equilibrative, not concentrative. In addition, it is a substrate of a known anion efflux pump (ABCC4), whose in vivo activity is largely unknown. Exogeneous addition of L-tryptophan or L-kynurenine leads to the production of KYNA but also to that of many other co-metabolites (including some such as 3-hydroxy-L-kynurenine and quinolinic acid that may be toxic). With the exception of chestnut honey, KYNA exists at relatively low levels in natural foodstuffs. However, its bioavailability is reasonable, and as the terminal element of an irreversible reaction of most tryptophan degradation pathways, it might be added exogenously without disturbing upstream metabolism significantly. Many examples, which we review, show that it has valuable bioactivity. Given the above, we review its potential utility as a nutraceutical, finding it significantly worthy of further study and development.

Probiotics and Paraprobiotics: Effects on Microbiota-Gut-Brain Axis and Their Consequent Potential in Neuropsychiatric Therapy

Neuropsychiatric disorders are clinical conditions that affect cognitive function and emotional stability, often resulting from damage or disease in the central nervous system (CNS). These disorders are a worldwide concern, impacting approximately 12.5% of the global population. The gut microbiota has been linked to neurological development and function, implicating its involvement in neuropsychiatric conditions. Due to their interaction with gut microbial communities, probiotics offer a natural alternative to traditional treatments such as therapeutic drugs and interventions for alleviating neuropsychiatric symptoms. Introduced by Metchnikoff in the early 1900s, probiotics are live microorganisms that provide various health benefits, including improved digestion, enhanced sleep quality, and reduced mental problems. However, concerns about their safety, particularly in immunocompromised patients, warrant further investigation; this has led to the concept of "paraprobiotics", inactivated forms of beneficial microorganisms that offer a safer alternative. This review begins by exploring different methods of inactivation, each targeting specific cellular components like DNA or proteins. The choice of inactivation method is crucial, as the health benefits may vary depending on the conditions employed for inactivation. The subsequent sections focus on the potential mechanisms of action and specific applications of probiotics and paraprobiotics in neuropsychiatric therapy. Probiotics and paraprobiotics interact with gut microbes, modulating the gut microbial composition and alleviating gut dysbiosis. The resulting neuropsychiatric benefits primarily stem from the gut-brain axis, a bidirectional communication channel involving various pathways discussed in the review. While further research is needed, probiotics and paraprobiotics are promising therapeutic agents for the management of neuropsychiatric disorders.

Intuitive eating in the COVID-19 era: a study with university students in Brazil

BACKGROUND

The recurrence of weight gain is attributed to the homeostatic regulation of hunger and satiety signals, influenced by metabolic state, nutrient availability, and non-homeostatic mechanisms shaped by reinforced consequences from experiences. In response, Evelyn Tribole and Elyse Resch proposed Intuitive Eating (IE) in 1980, countering restrictive diets. IE, inversely correlated with Body Mass Index (BMI), binge eating, and anxiety/depression symptoms, fosters mind-body-food harmony by recognizing hunger and satiety cues. IE encourages meeting physiological, not emotional, needs, permitting unconditional eating, and relying on internal signals for food decisions. Amidst university students' stress, exacerbated during the COVID-19 pandemic, understanding their eating behavior, particularly intuitive eating levels, becomes crucial.

OBJECTIVE

This study aimed to assess the IE level of Brazilian students during the COVID-19 pandemic.

METHODS

This cross-sectional study, the first to analyze the Intuitive Eating of students in Brazil during the pandemic, was conducted using an online questionnaire.

RESULTS

The sample comprised 1335 students, most of whom were women (82.17%), with a mean age of 26.12 ± 7.9 years, and a healthy nutritional status (57.58%). The mean IE score was 3.2 ± 0.6. A significant association was found between the confinement situation, the type of housing unit, and the IE subscale-Unconditional Permission to Eat (p = 0.043). However, there was no association between the other subscales and the total IE scale. Regarding self-reported mental and eating disorders, the most frequent were anxiety (21.2%), depression (6.5%), and binge eating disorder (BED) (4.7%). IE was negatively associated with BED (B =  - 0.66; p < .001), bulimia nervosa (B =  - 0.58; p < .001), body mass index (BMI) (p < .001) and self-reported anxiety (B =  - .102; p = 0.16). The male sex showed a higher IE score compared with the female sex (p < .001).

CONCLUSION

While no significant association was found between IE and the confinement situation, a significant association was found between housing type and the Unconditional Permission to Eat subscale.

Patterns of eating behaviors, physical activity, and lifestyle modifications among Bangladeshi adolescents during the COVID-19 pandemic

BACKGROUND

Several safety measures like movement restrictions, closure of educational institutions, and social distancing measures continue over the world including Bangladesh during the COVID-19 pandemic. This study aimed to examine the patterns of eating behaviors, physical activity, and lifestyle modifications among adolescents during the COVID-19 pandemic residing in Bangladesh.

METHODS

A cross-sectional study was performed among 490 adolescents in Bangladesh from December 2020 to May 2021. The survey was carried out through a semi-structured web-based questionnaire that asked questions about socio-demographics (i.e., age, sex, marital status, education, residence), perceived health status and quality of life, anthropometrics (i.e., height, weight), dietary habits (i.e., frequency of eating, daily intake of certain foods, number of meals eaten daily), and physical activity (i.e., modified version of the International Physical Activity Questionnaire Short Form [IPAQ-SF]), as well as, pre- and during COVID-19 information on stress, and sleep.

RESULTS

During the pandemic, 43.7% participants reported weight gain; and 23.5% reported an increased number of meals per day during COVID-19. Additionally, the participants' eating habits diverged from the local balanced diet principles and were more akin to 'unhealthy' eating patterns. Though, during the COVID-19 pandemic, physical exercise slightly increased (>3 times/ week: 8.2% vs. 13.5%; p<0.001) compared to pre-COVID-19 period, the screen time for entertainment increased drastically (>5 hours/ week: 12.2% vs. 27.3%; p<0.001). Compared to the pre-pandemic, a sizeable proportion of individuals experienced more physical tiredness, emotional exhaustion, irritation, and stress (p<0.001) during the pandemic. During the pandemic, 47.5% of participants experienced different sleep difficulties.

CONCLUSIONS

Although lockdowns and social distancing are important safety measures to protect people from COVID-19, findings reveal that they might cause a variety of lifestyle changes, physical inactivity, and psychological issues in Bangladeshi adolescents.

Zebrafish: A trending model for gut-brain axis investigation

Zebrafish (Danio rerio) has ascended as a pivotal model organism in the realm of gut-brain axis research, principally owing to its high-throughput experimental capabilities and evolutionary alignment with mammals. The inherent transparency of zebrafish embryos facilitates unprecedented real-time imaging, affording unparalleled insights into the intricate dynamics of bidirectional communication between the gut and the brain. Noteworthy are the structural and functional parallels shared between the zebrafish and mammalian gut-brain axis components, rendering zebrafish an invaluable model for probing the molecular and cellular intricacies inherent in this critical physiological interaction. Recent investigations in zebrafish have systematically explored the impact of gut microbiota on neurodevelopment, behaviour, and disease susceptibility, underscoring the model's prowess in unravelling the multifaceted influence of microbial communities in shaping gut-brain interactions. Leveraging the genetic manipulability inherent in zebrafish, researchers have embarked on targeted explorations of specific pathways and molecular mechanisms, providing nuanced insights into the fundamental functioning of the gut-brain axis. This comprehensive review synthesizes pivotal findings and methodological advancements derived from zebrafish-based gut-brain axis research, accentuating the model's potential to significantly advance our understanding of this complex interplay. Furthermore, it underscores the translational significance of these insights, offering promising avenues for the identification of therapeutic targets in neuro-gastroenterological disorders and psychiatric conditions intricately linked with gut-brain interactions.

Fermented foods and gastrointestinal health: underlying mechanisms

Although fermentation probably originally developed as a means of preserving food substrates, many fermented foods (FFs), and components therein, are thought to have a beneficial effect on various aspects of human health, and gastrointestinal health in particular. It is important that any such perceived benefits are underpinned by rigorous scientific research to understand the associated mechanisms of action. Here, we review in vitro, ex vivo and in vivo studies that have provided insights into the ways in which the specific food components, including FF microorganisms and a variety of bioactives, can contribute to health-promoting activities. More specifically, we draw on representative examples of FFs to discuss the mechanisms through which functional components are produced or enriched during fermentation (such as bioactive peptides and exopolysaccharides), potentially toxic or harmful compounds (such as phytic acid, mycotoxins and lactose) are removed from the food substrate, and how the introduction of fermentation-associated live or dead microorganisms, or components thereof, to the gut can convey health benefits. These studies, combined with a deeper understanding of the microbial composition of a wider variety of modern and traditional FFs, can facilitate the future optimization of FFs, and associated microorganisms, to retain and maximize beneficial effects in the gut.

Exploring the Psychological Impact of Quarantine: An Investigation into Eating Patterns, Emotions, and Loneliness During the COVID-19 Pandemic in Greece

PURPOSE

The implementation of quarantine measures in response to the COVID-19 pandemic presented challenges linked to adverse psychological effects, notably affecting individuals' eating patterns. This study aimed to investigate the eating patterns of individuals during lockdowns compared across sex, age, and income levels, and examine the influence of positive and negative emotions, as well as loneliness, on these patterns.

METHODS

A cross-sectional online study was conducted with 450 participants (aged 18-74 years old). One questionnaire about demographics, the Demographic Questionnaire, and three validated self-report scales (Eating Attitudes Test, comprising the Dieting, Bulimia, and Food Preoccupation, and Oral Control subscales, the Modified Differential Emotions Scale, and the UCLA Loneliness Scale) were employed. Convenience and snowball sampling were used. The data were collected between April and May 2021, primarily through social media platforms, such as Facebook, Instagram, and Twitter. The survey questionnaire was shared via these platforms and users could answer if they wanted. Also, they were asked to send the questionnaire to their close contacts. Additionally, the survey questionnaire was distributed face-to-face to 80 participants. The statistical analyses included linear regression and mediation analyses.

RESULTS

 Abnormal eating patterns (e.g. eating behaviors that tend to have signs of diet such as constant avoidance of fattening foods, the individual's involvement with becoming leaner, extreme control or preoccupation with food, overeating and purging methods) were identified in 25% of the 450 participants participated in this survey, aged 18-74 years. Moderate levels of negative/positive emotions and loneliness were predominantly reported. Female sex was significantly associated with abnormal eating patterns (p=0.010), particularly dietary behaviors (p=0.029). Negative emotions (p=0.032) and loneliness (p=0.001) emerged as predictive factors for overall eating patterns and bulimic behaviors. Negative emotions exhibited a direct correlation with eating patterns, while loneliness played a significant mediating role (p=0.032). Furthermore, the association between negative emotions and bulimia was partially mediated by loneliness (p=0.018).

CONCLUSIONS

This study underscores the pivotal roles of negative emotions and loneliness in shaping eating patterns during quarantine. Multilevel public health interventions are needed to address the negative effects of quarantine and pandemics in general. Screening tests for mental health in the school and job environments could highlight the need for shaping interventions, such as counseling, group empowerment, and family support in order to mitigate the negative impact of the COVID-19 pandemic on eating behaviors and mental health in general.

Lifestyle and eating habits changes among adults during COVID-19 era in Egypt: a population-based study

BACKGROUND

The 2019 recent Coronavirus is without a doubt one of the most complicated viruses to ever pose a threat to humanity. Numerous viral containment strategies forced sedentary behaviors and dietary changes that would-otherwise- increase the chances of acquiring non-communicable diseases.

OBJECTIVES

The objectives of the current study are to identify any changes in eating behaviors through the Mediterranean Diet Adherence in a sample of Egyptians throughout the COVID-19 era.

METHODS

A cross-sectional study was done on a sample of 205 Egyptians by an online self-administered questionnaire. The questionnaire included socio-demographic factors, self-reported weights and heights, a validated Arabic form of the well-known International Physical Activity Questionnaire Short Form (IPAQ-SF), a validated Arabic version of 14-items Mediterranean Diet Adherence Screener (MEDAS), in addition to a section assessing dietetic changes. The data was then analyzed using the SPSS version 20 (Statistical Package for Social Sciences).

RESULTS

The majority of the study sample were females (74.6%); had a high level of education (93.2%); and about 75% were married. Most of the participants were non-smokers, with around a 7% increased frequency of smoking after the COVID-19 pandemic. Fast food consumption was also reported by a major percentage of study participants (60%). Low Mediterranean Diet Adherence was found in 52.7%. Moreover, Physical Activity (PA) decreased to 61%. Moreover, there was a statistically significant increase seen in the participants' BMI as well as the number of sleeping hours (p = 0.001 and 0.043 respectively) after the pandemic. Both changed hunger sensation and any changes in physical activity were significantly associated with increased BMI (p < 0.001).

CONCLUSION AND RECOMMENDATIONS

A substantial proportion of the participants showed unhealthy changes in their dietary habits as well as physical activity. Consequently, this calls for urgent public health policies and interventions to guard against the consequences of such unhealthy behaviors.

Fermented foods: Harnessing their potential to modulate the microbiota-gut-brain axis for mental health

Over the past two decades, whole food supplementation strategies have been leveraged to target mental health. In addition, there has been increasing attention on the ability of gut microbes, so called psychobiotics, to positively impact behaviour though the microbiota-gut-brain axis. Fermented foods offer themselves as a combined whole food microbiota modulating intervention. Indeed, they contain potentially beneficial microbes, microbial metabolites and other bioactives, which are being harnessed to target the microbiota-gut-brain axis for positive benefits. This review highlights the diverse nature of fermented foods in terms of the raw materials used and type of fermentation employed, and summarises their potential to shape composition of the gut microbiota, the gut to brain communication pathways including the immune system and, ultimately, modulate the microbiota-gut-brain axis. Throughout, we identify knowledge gaps and challenges faced in designing human studies for investigating the mental health-promoting potential of individual fermented foods or components thereof. Importantly, we also suggest solutions that can advance understanding of the therapeutic merit of fermented foods to modulate the microbiota-gut-brain axis.

Effect of different stress conditions on the formation of amino acid derivatives by Brewer's and Baker's yeast during fermentation

The effects of environmental stresses on the formation of amino acid derivatives by Saccharomyces cerevisiae NCYC 88 and Saccharomyces cerevisiae NCYC 79 were investigated. Fermentation was performed in model systems under different temperature, pH, alcohol, phenolic, and osmotic stress conditions, as well as in beer and dough. According to stress response molecules, yeasts were more affected by osmotic, temperature, and alcohol stresses. Both yeast strains increased the formation of kynurenic acid, tryptophan ethyl ester, tryptophol, and gamma-aminobutyric acid under osmotic stress conditions in model systems. Indole-3-acetic acid was found to be higher in the ferulic acid stress dough (262 µg/kg dry weight, d.w.) compared to the control dough (132 µg/kg d.w.) at the end of the fermentation. The results may enable the development of new strategies for designing novel foods with a desired composition of bioactive amino acid derivatives.

Mechanisms underlying palmitic acid-induced disruption of locomotor activity and sleep behavior in Drosophila

The globally prevalent of sleep disorders is partly attributed to unhealthy dietary habits. This study investigated the underlying mechanisms of elevated palmitic acid (PA) intake on locomotor activity and sleep behavior in Drosophila. Our results indicate that exposure to PA significantly elevated Drosophila's daytime and nighttime locomotor activity while concurrently reducing overall sleep duration. Utilizing 16S rRNA sequencing, we observed substantial alterations in the composition of the gut microbiota induced by PA, notably, characterized by a significant reduction in Lactobacillus plantarum. Furthermore, PA significantly increased the levels of inflammatory factors Upd3 and Eiger in Drosophila intestines, and downregulated the expression of Gad and Tph, as well as 5-HT1A. Conversely, Gdh and Hdc were significantly upregulated in the PA group. Supplementation with L. plantarum or lactic acid significantly ameliorated PA-induced disruptions in both locomotor activity and sleep behavior. This supplementation also suppressed the expression of intestinal inflammatory factors, thus restoring impaired neurotransmitter-mediated sleep-wake regulation. Moreover, specific knockdown of intestinal epithelial Upd3 or Eiger similarly restored disrupted neurotransmitter expression, ultimately improving PA-induced disturbances in Drosophila locomotor activity and sleep behavior. These findings provide important insights into the intricate interplay between dietary components and essential behaviors, highlighting potential avenues for addressing health challenges associated with modern dietary habits.

Habitual salt preference worsens blood pressure in hospitalized hypertensive patients with omicron infection under epidemic-related stress

BACKGROUND

We investigated the synergistic effect of stress and habitual salt preference (SP) on blood pressure (BP) in the hospitalized Omicron-infected patients.

METHODS

From 15,185 hospitalized Omicron-infected patients who reported having high BP or hypertension, we recruited 662 patients. All patients completed an electronic questionnaire on diet and stress, and were required to complete morning BP monitoring at least three times.

RESULTS

The hypertensive group (n = 309) had higher habitual SP (P = 0.015) and COVID-19 related stress (P < 0.001), and had longer hospital stays (7.4 ± 1.5 days vs. 7.2 ± 0.5 days, P = 0.019) compared with controls (n = 353). After adjusting for a wide range of covariates including Omicron epidemic-related stress, habitual SP was found to increase both systolic (4.9 [95% confidence interval (CI), 2.3-7.4] mmHg, P < 0.001) and diastolic (2.1 [95%CI, 0.6-3.6] mmHg, P = 0.006) BP in hypertensive patients, and increase diastolic BP (2.0 [95%CI, 0.2-3.7] mmHg, P = 0.026) in the control group. 31 (8.8%) patients without a history of hypertension were discovered to have elevated BP during hospitalization, and stress was shown to be different in those patients (P < 0.001). In contrast, habitual SP was more common in hypertensive patients with uncontrolled BP, compared with patients with controlled BP (P = 0.002).

CONCLUSIONS

Habitual SP and psychosocial stress were associated with higher BP in Omicron-infected patients both with and without hypertension. Nonpharmaceutical intervention including dietary guidance and psychiatric therapy are crucial for BP control during the long COVID-19 period.

Melatonin as a Mediator of the Gut Microbiota-Host Interaction: Implications for Health and Disease

In recent years, the role played by melatonin on the gut microbiota has gained increasingly greater attention. Additionally, the gut microbiota has been proposed as an alternative source of melatonin, suggesting that this antioxidant indoleamine could act as a sort of messenger between the gut microbiota and the host. This review analyses the available scientific literature about possible mechanisms involved in this mediating role, highlighting its antioxidant effects and influence on this interaction. In addition, we also review the available knowledge on the effects of melatonin on gut microbiota composition, as well as its ability to alleviate dysbiosis related to sleep deprivation or chronodisruptive conditions. The melatonin-gut microbiota relationship has also been discussed in terms of its role in the development of different disorders, from inflammatory or metabolic disorders to psychiatric and neurological conditions, also considering oxidative stress and the reactive oxygen species-scavenging properties of melatonin as the main factors mediating this relationship.

Study on the material basis and mechanism of Hemerocallis citrina Baroni on sleep-improvement using Drosophila activity monitoring, metabolomic, targeted screening and transcriptomic

Daylily (Hemerocallis citrina Baroni, HC) is an edible plant and is traditionally considered with potential to improve sleep. Herein, based on the Drosophila activity monitoring, metabolome, targeted screening and transcriptome, the material basis and mechanism of HC on sleep-improvement was investigated. The results showed that the aqueous extracts of HC (HAE) as well as the ethanol extracts (HEE) all prolonged the total sleep time of insomnia fruit flies, especially HEE-60 and HEE-95 exhibited more significant effects. In addition, 539 of 728 found metabolites were screened as potential sleep-improved metabolites, and quercetin, linoleic acid, phenethyl caffeate, L-methionine and γ-aminobutyric acid were considered as core active metabolites. Meanwhile, 368 differentially expressed genes (DEGs) were revealed by transcriptomics analysis, and the neuroactive ligand-receptor interaction was deduced as the main pathway by KEGG pathway enrichment. Furthermore, nine DEGs located in this pathway, namely betaTry, deltaTry, gammaTry, epsilonTry, etaTry, iotaTry, lambdaTry, kappaTry and CG30031 were proven being up-regulated. All these results contribute to the development of HC-related functional foods.

Hawaiian Plants with Beneficial Effects on Sleep, Anxiety, and Mood, etc

Diverse chemical messengers are responsible for maintaining homeostasis in the human body, for example, hormones and neurotransmitters. Various Hawaiian plant species produce compounds that exert effects on these messengers and the systems of which they are a part. The main purpose of this review article is to evaluate the potential effects of Hawaiian plants on reducing pain and anxiety and improving sleep and mood. A comprehensive literature search was conducted in SciFinder, PubMed, Science Direct, Scopus, Google Scholar, and Scientific Information Database between 2019 and 2023 to identify related articles. Results indicate that several Hawaiian plant species, such as M. citrifolia and P. methysticum, have medicinal properties associated with these effects. These plants have been used in traditional Hawaiian cultural practices for centuries, suggesting their potential to benefit human health and well-being. This review presents a comprehensive analysis of the available evidence concerning the potential impacts of Hawaiian plants on sleep, anxiety, mood, and pain.

Barriers and shortcomings in access to cardiovascular management and prevention for familial hypercholesterolemia during the COVID-19 pandemic

Familial hypercholesterolemia (FH) is a hereditary condition caused by mutations in the lipid pathway. The goal in managing FH is to reduce circulating low-density lipoprotein cholesterol and, therefore, reduce the risk of developing atherosclerotic cardiovascular disease (ASCVD). Because FH patients were considered high risk groups due to an increased susceptible for contracting COVID-19 infection, we hypothesized whether the effects of the pandemic hindered access to cardiovascular care. In this review, we conducted a literature search in databases Pubmed/Medline and ScienceDirect. We included a comprehensive analysis of findings from articles in English related and summarized the effects of the pandemic on cardiovascular care through direct and indirect effects. During the COVID-19 pandemic, FH patients presented with worse outcomes and prognosis, especially those that have suffered from early ASCVD. This caused avoidance in seeking care due to fear of transmission. The pandemic severely impacted consultations with lipidologists and cardiologists, causing a decline in lipid profile evaluations. Low socioeconomic communities and ethnic minorities were hit the hardest with job displacements and lacked healthcare coverage respectively, leading to treatment nonadherence. Lock-down restrictions promoted sedentary lifestyles and intake of fatty meals, but it is unclear whether these factors attenuated cardiovascular risk in FH. To prevent early atherogenesis in FH patients, universal screening programs, telemedicine, and lifestyle interventions are important recommendations that could improve outcomes in FH patients. However, the need to research in depth on the disproportionate impact within different subgroups should be the forefront of FH research.

The Role of Gut Microbiota in Anxiety, Depression, and Other Mental Disorders as Well as the Protective Effects of Dietary Components

The number of individuals experiencing mental disorders (e.g., anxiety and depression) has significantly risen in recent years. Therefore, it is essential to seek prevention and treatment strategies for mental disorders. Several gut microbiota, especially Firmicutes and Bacteroidetes, are demonstrated to affect mental health through microbiota-gut-brain axis, and the gut microbiota dysbiosis can be related to mental disorders, such as anxiety, depression, and other mental disorders. On the other hand, dietary components, including probiotics (e.g., Lactobacillus and Bifidobacterium), prebiotics (e.g., dietary fiber and alpha-lactalbumin), synbiotics, postbiotics (e.g., short-chain fatty acids), dairy products, spices (e.g., Zanthoxylum bungeanum, curcumin, and capsaicin), fruits, vegetables, medicinal herbs, and so on, could exert protective effects against mental disorders by enhancing beneficial gut microbiota while suppressing harmful ones. In this paper, the mental disorder-associated gut microbiota are summarized. In addition, the protective effects of dietary components on mental health through targeting the gut microbiota are discussed. This paper can be helpful to develop some dietary natural products into pharmaceuticals and functional foods to prevent and treat mental disorders.

Biogenic amines and stable isotopes in the quality and authenticity of honeys from Brazil

The identification of biogenic amines and some precursor amino acids and the adulteration through stable isotopes was carried out in 114 honey from different geographic regions in Brazil (states of São Paulo (SP) and Santa Catarina (SC)) as support for evaluating quality control and food safety. Serotonin was detected in all samples, while melatonin was quantified in 92.2% of honey from SP and in 94% of SC. l-Dopa, dopamine and histamine appeared at higher levels in honey from SP. Cadaverine, putrescine, spermidine and spermine, varied little according to botanical source. Three honey from the metropolitan region of SP were considered adulterated (C4_SUGARS > 7%), 92 were authentic samples (C4_SUGARS - 7 to 7%) and 19 unadulterated (C4_SUGARS less than - 7%), with isotopic values of δ¹³C_H and δ¹³C_P > 7%. The data were important for differentiating quality as a function of biogenic amines and stable isotope technique was important in detecting honey adulteration.

A Sociodemographic Analysis of the Impact of COVID-19-Related Schools' Closure on the Diet and Physical Activity of Children and Adolescents in Qatar

OBJECTIVES

To assess the impact of the COVID-19-related closure of government schools in Qatar on children and adolescents' dietary habits and physical activities and associated sociodemographic factors.

METHODS

An analytical cross-sectional study was conducted between June and August 2022 utilizing the national electronic health records system in Qatar to extract a sampling frame of students enrolled in governmental schools, specifically targeting students in 3rd to 9th grades, stratified by sex and developmental stage. A stratified sampling technique was employed to randomly select a proportionate number of students from each stratum, and data were collected through telephone interviews with the parents of selected students.

RESULTS

A total of 1546 interviews were completed by the end of the study. Of the included sample, 845 (54.7%) were between 8 and 11 years of age (middle childhood), while the rest were 12-15 years old (young teens and teenagers). Male to female ratio was almost 1:1. We found a significant decrease in the intake of vegetables, increases in the intake of soft drinks, fried food, fast food, and sweets, and a reduction in physical activity during schools' closure compared to before. Higher parental educational levels, maternal employment, and having a positive family history of obesity and/or overweight in first-degree relatives were significantly associated with adverse lifestyle changes during schools' closure.

CONCLUSION

The trends of lifestyle changes reported in this study during the periods of COVID-19-related schools' closure were found to be going in a health-compromising direction. These results underscore the importance of implementing targeted interventions to promote healthy lifestyles during such disruptions and emphasize the need to address lifestyle changes beyond emergencies and outbreaks to mitigate potential long-term health consequences, including the increased risk of non-communicable diseases.

Changes in the Physicochemical Properties of Chia (Salvia hispanica L.) Seeds during Solid-State and Submerged Fermentation and Their Influence on Wheat Bread Quality and Sensory Profile

This study aimed at investigating the impacts of 24 h of either solid-state fermentation (SSF) or submerged fermentation (SMF) with Lactiplantibacillus plantarum strain No. 122 on the physico-chemical attributes of chia seeds (CS). Furthermore, this study examined how adding fermented chia seeds (10, 20, and 30% concentrations) affected the properties and sensory profile of wheat bread. Acidity, lactic acid bacteria (LAB) viable counts, biogenic amine (BA), and fatty acid (FA) profiles of fermented chia seeds were analysed. The main quality parameters, acrylamide concentration, FA and volatile compound (VC) profiles, sensory characteristics, and overall acceptability of the obtained breads, were analysed. A decline in the concentration of certain BA and saturated FA and an increase in polyunsaturated FA and omega-3 (ω-3) were found in fermented CS (FCS). The same tendency in the FA profile was observed in both breads, i.e., breads with non-fermented CS (NFCS) or FCS. The quality parameters, VC profile, and sensory attributes of wheat bread were significantly affected by the addition of NFCS or FCS to the main bread formula. All supplemented breads had reduced specific volume and porosity, but SSF chia seeds increased moisture and decreased mass loss after baking. The lowest acrylamide content was found in bread with a 30% concentration of SSF chia seeds (11.5 µg/kg). The overall acceptance of supplemented breads was lower than the control bread, but breads with 10 and 20% SMF chia seed concentrations were still well accepted (on average, 7.4 score). Obtained results highlight that fermentation with Lp. plantarum positively contributes to chia seed nutritional value, while incorporation of NFCS and FCS at certain levels results in an improved FA profile, certain sensory attributes, and reduced acrylamide content in wheat bread.

REPEATED DONKEY MILK CONSUMPTION REDUCES ANXIETY-LIKE BEHAVIORS AND BRAIN OXIDATIVE DAMAGE TO LIPIDS IN MICE

Donkey milk (DM) is a source of bioactive compounds that can benefit neural functioning. In the present study, we investigated the effects of DM consumption on anxiolytic-related, despair-like, locomotion and coordination behaviors, as well as the provision of protection from oxidative damage to lipids and proteins in brain tissues and melatonin plasma levels. To achieve this, male mice orally received DM (4g.kg^-1) or vehicle for 18 days. Their behavior was assessed in the following tests: elevated plus maze (EPM), open field and rotarod tests (OF, RR) and forced swimming test (FST). Acute treatments with diazepam (DZP, 1.5mg.kg^-1, v.o.), fluoxetine (FLX, 20mg.kg^-1, i.p.) and nortriptyline (NTP, 20mg.kg^-1, i.p.) were used as positive controls. On the eighteenth day, the animals were euthanized and brain tissue and blood were collected to measure oxidative damage, and melatonin plasma levels. Similar to DZP, repeated DM consumption reduced exploration to open areas in the EPM test. Under our experimental conditions, conventional antidepressants reduced immobility time in the FST, and the benzodiazepine treatment impaired motor coordination in mice. No significant differences in locomotion, motor coordination and despair-related behaviors were observed in the mice treated with DM when assessed in the EPM, OF, RR and FST, respectively. Biochemical assays showed that repeated DM exposition protected against oxidative damage to lipids and increased plasma levels of melatonin. These findings suggest consumption of DM may be a promising food for the treatment of anxiety-related disorders, without depressant effects on the central nervous system.

The Impact of Nutrition, Physical Activity, Beneficial Microbes, and Fecal Microbiota Transplant for Improving Health

The recognition that microbes are integral to human life has led to studies on how to manipulate them in favor of health outcomes. To date, there has been no conjoint recommendation for the intake of dietary compounds that can complement the ingested organisms in terms of promoting an improved health outcome. The aim of this review is to discuss how beneficial microbes in the form of probiotics, fermented foods, and donor feces are being used to manage health. In addition, we explore the rationale for selecting beneficial microbial strains and aligning diets to accommodate their propagation in the gut. A pilot clinical trial design is presented to examine the effects of probiotics and exercise in patients with phenylketonuria (PKU); it is the most common inborn error of amino acid metabolism, and it is a complication that requires lifelong dietary intervention. The example design is provided to illustrate the importance of using omics technology to see if the intervention elevates neuroactive biogenic amines in the plasma; increases the abundance of Eubacterium rectale, Coprococcus eutactus, Akkermansia muciniphila, or Butyricicoccus; and increases Escherichia/Shigella in the gut, all as markers of improved health. By emphasizing the combined importance of diet, microbial supplements, and the gut microbiome, we hope that future studies will better align these components, not only to improve outcomes, but also to enhance our understanding of the mechanisms.

The role of nutrition knowledge in dietary adjustments during COVID-19 pandemic

Knowledge/awareness significantly influences people's dietary choices, lifestyle, and inadvertently their health outcomes; hence it is imperative that people have correct information with regards to food and health. This study was undertaken to establish the role of nutrition knowledge on dietary choices and habits of people in Calabar, especially after the hard COVID-19 lockdown, and to ascertain if there was any positive or negative effect on the lifestyle of the people. It consisted of a cross-sectional survey in Calabar, Cross River State - Nigeria. An online questionnaire was prepared after sample size determination and its content validated. The questionnaire was designed to obtain data on the socio-economic status, participants' lifestyle, and changes in dietary intake/health before and during the COVID-19 lockdown, while the questionnaire link was in circulation for 6 weeks (April/May 2021). Descriptive statistics was used to define the proportion of responses for each question and Pearson's correlation was used to check for association between variables. Most participants were undergraduates depending on parents/sponsors. Financial decline appeared to have contributed to a post lockdown decrease in food consumption. Many (82.6%) respondents recorded high nutrition knowledge scores (NKS) and 83.1% of the respondents had high health scores. The results show that NKS influenced the kind of foods the respondents consumed frequently and there was a positive correlation between NKS consumption of fruits/vegetables. NKS had effect on their access to healthy foods and it varied significantly with respondent's total health score. No association existed between NKS and the reason for skipping meal - 'lack of time to prepare meals'. Nutrition knowledge and proper awareness, contributed significantly in dietary choices (regardless of limited resources), thus ensuring adequate nutrition and reduced health problems (most respondents recorded high health scores) during a pandemic. This study affirms the effectiveness of adequate nutrition education and awareness in ensuring healthy dietary choices, promoting optimal health, and reducing risks of diseases.

Valorization of Spent Brewer’s Yeast for the Production of High-Value Products, Materials, and Biofuels and Environmental Application

Spent brewer’s yeast (SBY) is a byproduct of the brewing industry traditionally used as a feed additive, although it could have much broader applications. In this paper, a comprehensive review of valorization of SBY for the production of high-value products, new materials, and biofuels, as well as environmental application, is presented. An economic perspective is given by mirroring marketing of conventional SBY with innovative high-value products. Cascading utilization of fine chemicals, biofuels, and nutrients such as proteins, carbohydrates, and lipids released by various SBY treatments has been proposed as a means to maximize the sustainable and circular economy.

Advances in the Role and Mechanisms of Essential Oils and Plant Extracts as Natural Preservatives to Extend the Postharvest Shelf Life of Edible Mushrooms

China has a large variety of edible mushrooms and ranks first in the world in terms of production and variety. Nevertheless, due to their high moisture content and rapid respiration rate, they experience constant quality deterioration, browning of color, loss of moisture, changes in texture, increases in microbial populations, and loss of nutrition and flavor during postharvest storage. Therefore, this paper reviews the effects of essential oils and plant extracts on the preservation of edible mushrooms and summarizes their mechanisms of action to better understand their effects during the storage of mushrooms. The quality degradation process of edible mushrooms is complex and influenced by internal and external factors. Essential oils and plant extracts are considered environmentally friendly preservation methods for better postharvest quality. This review aims to provide a reference for the development of new green and safe preservation and provides research directions for the postharvest processing and product development of edible mushrooms.

Targeted and untargeted metabolomics reveals deep analysis of drought stress responses in needles and roots of Pinus taeda seedlings

Drought stress is one of major environmental stresses affecting plant growth and yield. Although Pinus taeda trees are planted in rainy southern China, local drought sometime occurs and can last several months, further affecting their growth and resin production. In this study, P. taeda seedlings were treated with long-term drought (42 d), and then targeted and untargeted metabolomics analysis were carried out to evaluate drought tolerance of P. taeda. Targeted metabolomics analysis showed that levels of some sugars, phytohormones, and amino acids significantly increased in the roots and needles of water-stressed (WS) P. taeda seedlings, compared with well-watered (WW) pine seedlings. These metabolites included sucrose in pine roots, the phytohormones abscisic acid and sacylic acid in pine needles, the phytohormone gibberellin (GA4) and the two amino acids, glycine and asparagine, in WS pine roots. Compared with WW pine seedlings, the neurotransmitter acetylcholine significantly increased in needles of WS pine seedlings, but significantly reduced in their roots. The neurotransmitters L-glutamine and hydroxytyramine significantly increased in roots and needles of WS pine seedlings, respectively, compared with WW pine seedlings, but the neurotransmitter noradrenaline significantly reduced in needles of WS pine seedlings. Levels of some unsaturated fatty acids significantly reduced in roots or needles of WS pine seedlings, compared with WW pine seedlings, such as linoleic acid, oleic acid, myristelaidic acid, myristoleic acid in WS pine roots, and palmitelaidic acid, erucic acid, and alpha-linolenic acid in WS pine needles. However, three saturated fatty acids significantly increased in WS pine seedlings, i.e., dodecanoic acid in WS pine needles, tricosanoic acid and heptadecanoic acid in WS pine roots. Untargeted metabolomics analysis showed that levels of some metabolites increased in WS pine seedlings, especially sugars, long-chain lipids, flavonoids, and terpenoids. A few of specific metabolites increased greatly, such as androsin, piceatanol, and panaxatriol in roots and needles of WS pine seedlings. Comparing with WW pine seedlings, it was found that the most enriched pathways in WS pine needles included flavone and flavonol biosynthesis, ABC transporters, diterpenoid biosynthesis, plant hormone signal transduction, and flavonoid biosynthesis; in WS pine roots, the most enriched pathways included tryptophan metabolism, caffeine metabolism, sesquiterpenoid and triterpenoid biosynthesis, plant hormone signal transduction, biosynthesis of phenylalanine, tyrosine, and tryptophan. Under long-term drought stress, P. taeda seedlings showed their own metabolomics characteristics, and some new metabolites and biosynthesis pathways were found, providing a guideline for breeding drought-tolerant cultivars of P. taeda.

Varietal Influence on the Formation of Bioactive Amines during the Processing of Fermented Cocoa with Different Pulp Contents

During cocoa processing, there can be the formation of bioactive amines, which are compounds that play relevant roles not only in plant development but also in human health. Thus, we aimed to investigate the presence and levels of bioactive amines during the processing of two important varieties of cocoa (PS 1319 and Parazinho). The seeds were fermented using five different pulp proportions: 100% (E1), 80% (E2), 60% (E3), and 0% (total pulp removal) (E4). The beans were fermented and dried on a farm following traditional procedures. Soon after, they were roasted and processed into chocolates with 60% cocoa in the laboratory. Bioactive amine contents were determined by ion-pair reversed-phase HPLC and fluorometric detection in the samples before, during, and after fermentation, after drying and roasting (nibs), and in the liquor and chocolate. The only amines found before processing in PS 1319 and Parazinho, respectively, in dry weight basis (dwb), were putrescine (pulp, 13.77 and 12.31; seed, 5.88 and 4.58) and serotonin (seed, 2.70 and 2.54). Fermentation was shorter for Parazinho (156 h) compared to PS 1319 (180 h). The changes in amines were affected by the cocoa variety. During drying, the presence of cadaverine stood out, appearing in all treatments of the PS 1319 variety, reaching 17.96 mg/kg dwb, and in two treatments of the Parazinho variety (100 and 60% pulp). During roasting, most of the amines decreased, except for phenylethylamine, which increased up to 2.47 mg/kg dwb for Parazinho and 1.73 mg/kg dwb for PS 1319. Most of the amines formed and built up (e.g., tyramine, putrescine, and cadaverine) during fermentation were not available or were at low levels in the nibs. Most of the amines found during processing did not reach the final product (chocolate), except for cadaverine in PS 1319 without pulp (7.54 mg/kg dwb). Finally, we confirmed how pulp content, processing, and variety influence the content of bioactive amines in cocoa and chocolate. These changes can be better demonstrated through a heatmap and principal component analysis.

Dietary Changes among the Indian Population during the Covid-19 Pandemic: A Cross-Sectional Study

Background

After the COVID-19 outbreak, significant changes in lifestyle and dietary patterns were observed. There are many studies indicating lifestyle changes but very few pointing out the intricate changes in consumption of different food groups, so our aim is to analyze the same.

Methods

A cross-sectional study was conducted among 450 participants between the age group of 18 and 60 years. A self-developed questionnaire with questions regarding the change in consumption of different food groups during the pandemic was circulated online among the urban population.

Results

It was observed that 46% participants turned down their consumption of fish and seafood and 48.2% participants lowered frozen protein consumption. 44.9% respondents increased their milk consumption and 41.8% reduced their intake of ice-creams. It was observed that 42.4% participants turned up their consumption of bread and buns and 47.3% of respondents increased their rice intake. It was further recorded that 39.6% and 40.9% participants raised their intake of sweets and chocolates and biscuits and cookies, respectively. 50% and 61.3% respondents ate more green leafy vegetables and fruits during the pandemic. There was a 53.3%, 46.9%, and 38.7% reduction in the consumption of hamburgers, pizza, and fried foods, respectively.

Conclusion

Majority of the participants have increased consumption of healthy foods like milk, fruits, vegetables, and nuts, while reduced the consumption of junk foods, carbonated drinks, and ice-cream. There has been a positive shift in the dietary pattern of the Indian population toward foods that help develop immunity despite its limited availability during the pandemic.

Changes in dietary habits and eating behaviors during COVID-19 induced confinement: A study from Jordan

Objective

This study aimed to evaluate dietary habits (DH) and eating behaviors (EB) among adults during confinement induced by COVID-19 in Jordan.

Method

In this cross-sectional study, an online survey designed to assess the change in DH and EB during April and May 2020 was distributed using various social media platforms.

Results

The survey was completed by a total of 1844 adult (18-72 years) participants from the public in Jordan. The results indicated an increase (42.5-61.8%) in most of the DH and EB examined in the current study in the majority of participants. Among these changes, they have increased (p < 0.05) the prevalence of fruit and vegetable, immune boosters, water, and hot beverage consumption, as well as decreased (p < 0.05) eating in restaurants and fatty food consumption, indicating a positive change. Conversely, a larger (p < 0.05) proportion of participants reported increased consumption of high-calorie food and late-night eating, indicating a risky behavior for obesity and subsequent chronic complications. Additionally, age, sex, obesity, education, income, and type of job appeared to contribute (p < 0.05) to changes in DH and EB. Overall, confinement caused by COVID-19 appears to compel adults to adopt a specific DH and EB. Although most of these changes were positive, some were negative.

Conclusion

This study provides essential information for designing subpopulation recommendations and developmental programs for adults under such conditions.

High Dietary Histamine Induces Digestive Tract Oxidative Damage in Juvenile Striped Catfish (Pangasianodon hypophthalmus)

A 56-day feeding trial investigated the effects of dietary histamine on the antioxidant capacity, gastric and intestinal barrier functions, and growth performance of striped catfish (Pangasianodon hypophthalmus). Seven isonitrogenous (34.0% crude protein) and isolipidic (10.5% crude lipid) diets were formulated with supplemental 0, 15, 30, 60, 120, 240, and 480 mg/kg of histamine, named H0, H15, H30, H60, H120, H240, and H480 group, respectively. Results showed that the weight gain rate, specific growth rate, relative intestinal length in the H240 and H480 groups, and the condition factors in the H480 group were significantly lower than those in the H0 group. Intestinal total antioxidant capacity, peroxidase, catalase, superoxide dismutase, glutathione peroxidase, and glutathione reductase activities in the H480 group were significantly lower than those in the H0 group, whereas intestinal malondialdehyde content exhibited the opposite trend. Intestinal complement 3, complement 4, immunoglobulin M, and Recombinant Mucin 2 in the H480 group were significantly lower than those in the H0 group, in contrast to intestinal lipopolysaccharide content. Intestinal IL-10 gene expression in the H480 group was significantly lower than that in the H0 group, whereas the TNF-α, IL-1, IL-6, and IL-8 gene expression exhibited opposite results. Scanning and transmission electron microscopic observation of the gastrointestinal tract revealed severe damage to the gastric mucosa and intestinal epithelium in the H480 group. The abundance of Treponema in the histamine groups was significantly higher than that in the H0 group. These results indicated that high dietary histamine decreases intestinal immunity and antioxidant capacity, inducing digestive tract oxidative damage and ultimately decreasing the growth of striped catfish.

The role of the gut microbiota in health and cardiovascular diseases

The gut microbiota is critical to human health, such as digesting nutrients, forming the intestinal epithelial barrier, regulating immune function, producing vitamins and hormones, and producing metabolites to interact with the host. Meanwhile, increasing evidence indicates that the gut microbiota has a strong correlation with the occurrence, progression and treatment of cardiovascular diseases (CVDs). In patients with CVDs and corresponding risk factors, the composition and ratio of gut microbiota have significant differences compared with their healthy counterparts. Therefore, gut microbiota dysbiosis, gut microbiota-generated metabolites, and the related signaling pathway may serve as explanations for some of the mechanisms about the occurrence and development of CVDs. Several studies have also demonstrated that many traditional and latest therapeutic treatments of CVDs are associated with the gut microbiota and its generated metabolites and related signaling pathways. Given that information, we summarized the latest advances in the current research regarding the effect of gut microbiota on health, the main cardiovascular risk factors, and CVDs, highlighted the roles and mechanisms of several metabolites, and introduced corresponding promising treatments for CVDs regarding the gut microbiota. Therefore, this review mainly focuses on exploring the role of gut microbiota related metabolites and their therapeutic potential in CVDs, which may eventually provide better solutions in the development of therapeutic treatment as well as the prevention of CVDs.

Association between lifestyle choices and mental health among medical students during the COVID-19 pandemic: A cross-sectional study

INTRODUCTION

Mental health is recognized as a critical component of public health Given the close relationship between mental health and life style and the importance of students as valuable human resources, the present study aimed at determining the relationship between life style and mental health among medical students in Sousse during COVID-19 pandemic.

METHODS

We conducted a cross-sectional observational study in university students from the first to the fifth grade of the Faculty of Medicine of Sousse during the academic year 2020/2021. Data were collected anonymously via an online questionnaire published on the Facebook groups of each grade, on december 2020. The online survey consisted of three sections. The first one aimed to collect sociodemographic information. The second section of the survey addressed recent lifestyle choices and the third one assessed psychological distress using the French version of 12 items of The General Health Questionnaire (GHQ-12). The significance level was considered 0.05.

RESULTS

Overall 147 were studied. Using the bimodal scoring, the total score was between 0 and 12, to evoke psychiatric disorders, we set the threshold of 4. For our sample, the median scale was 7 [4-9], and more than half of the students (68%; n = 100) had a score higher than 4. Psychiatric disorder was significantly more frequent in female students (73.3% vs 42.3%; p = 0.002). Higher GHQ-scale was found in younger students, foreigners, students who need more than 30 minutes to get to the faculty, unemployed students, and students of fifth grade. However, differences were not statistically significant. Regarding lifestyle choices, we found that physical inactivity, no smoking habits, no alcohol use, no illicit substance use, other substance use, changing in eating habits, and absence of coping methods of stress were higher in students with psychiatric disorders. However, this association was statistically significant only for physical activity (p = 0.016). The results of the regression analysis suggest female gender as an independent predictor of high GHQ-12 scores. Practicing physical activity was found as protective factor for psychiatric disorders.

CONCLUSION

Considering the vital role of medical students in providing and promoting community health, the need for more detailed planning and interventions to improve their life style and mental health is essential.

Impact of COVID-19 lockdown on food habits, Appetite and body weight in tunisian adults

Tunisia recorded the highest rate of COVID-19 positive cases and deaths in Africa but no studies assessed the impact of the pandemic on eating patterns as in the case of several countries. The objective of the present study was to investigate the perception of changes in food habits, appetite and body weight in Tunisian adults of both genders aged 20–74 years old. A cross-sectional study has been carried out with a non-probabilistic sampling method based on an online self-administered survey. Of overall 1082 adults included in the study, 57⋅8 % reported a change in their eating habits: 21⋅2 % an increase in their consumption of fresh fruits, vegetables, pulses, pasta and bread, while 36⋅6 % an increase of homemade cakes and biscuits, sweets, processed meat, sugary drinks and alcoholic drinks. In addition, tea, coffee and herbal tea have been reported as excessively consumed during the lockdown period. More than half experienced appetite variations (34⋅6 % increased appetite and 23⋅0 % appetite loss). Inequality detrimental to women was reported regarding eating habit changes (women consumed more unhealthier foods than men). Elderly subjects (over 60 years) were less likely to negatively change food habits in comparison with young adults (20–25 years), while ungraduated respondents were more prone to negatively change their food habits. Almost half reported weight gain. As the negative influence of the lockdown period on eating habits with the increase of obesity risk has been detected, health policy may be advised to focus on using mass media campaigns to promote healthy eating habits, in particular for illiterate and young people.

Codonopsis pilosula Polysaccharide Improved Spleen Deficiency in Mice by Modulating Gut Microbiota and Energy Related Metabolisms

Codonopsis Radix (CR) is an important traditional Chinese medicine used for the treatment of spleen deficiency syndrome (SDS). Codonopsis pilosula polysaccharides (CPP) in CR are considered to be responsible for tonifying the spleen function; however, the mechanisms of the polysaccharides have remained unclear. This study aimed to investigate the treatment mechanisms of CPP in SDS mice using a combinational strategy of 16S rRNA gene sequencing and targeted metabolomics. Here, studies demonstrated that CPP had invigorating effect in vivo in Sennae Folium-induced SDS in mice by organ indexes, D-xylose determination, gastrointestinal hormones levels and goblet cells observation. Antibiotic treatment revealed that the intestinal microbiota was required for the invigorating spleen effect of CPP. Furthermore, gut microbiota analysis found that CPP significantly enriched probiotic Lactobacillus and decreased the abundance of some opportunistic pathogens, such as Enterococcus and Shigella. The metabolic profile analysis of the colonic content revealed that 25 chemicals were altered significantly by CPP, including amino acids, organic acids, fatty acids, carbohydrates and carnitine etc., which are mainly related to "energy conversion" related processes such as amino acids metabolism, tricarboxylic acid cycle, and nitrogen metabolism. Spearman's correlation assays displayed there were strong correlations among biochemical indicators-gut microbiota-metabolomics. In summary, these results provided a new perspective for CPP improving SDS by regulating energy metabolism related bacteria and pathways.

Oral Habits during the Lockdown from the SARS-CoV-2 Pandemic in the Romanian Population

Background and Objectives: The SARS-CoV-2 pandemic led to changes in population daily patterns. In order to adapt oral health promotion measures for future similar conditions, the main objective of the study was to assess changes in dental hygiene and eating and smoking habits during the government lockdown in Romania. Materials and Methods: The cross-sectional study was conducted immediately after the end of the lockdown and consisted of 800 adult subjects. Data collection was done via an online survey. Participants were divided into two groups: non-medical/dental practitioners (N-M/D group) and medical/dental practitioners (M/D group). Results: An increased use of dental floss from 27% (pre-lockdown) to 30.5% (during lockdown) was identified in the M/D group, while the manual toothbrush usage increased to 64.8% (during lockdown) from 61.7% (pre-lockdown) in the N-MD/group. No significant differences regarding toothbrushing frequency were observed in either group. A change in the number of daily snacks was identified in both groups (3–4 snacks per day: from 11% to 20.2% in the N-M/D group, from 13.1% to 22.2% in the M/D group). The consumption of sweets as a preferred snack was also noticed. A decrease of tobacco consumers was assessed in the lockdown period (from 66.6% to 60.4% in the M/D group, from 68.5% to 61.9% in the N-/M/D group). Conclusions: Oral habits were changed during the pandemic lockdown through the increase in the frequency of the consumption of snacks and sweets and the decrease in frequency of smokers. Only minor changes were observed in oral hygiene.

Changes in Spanish lifestyle and dietary habits during the COVID-19 lockdown

PURPOSE

The COVID-2019 pandemic forced many governments to declare the "to stay at home" which encouraged social distancing and isolation among citizens. The aim of this study was to assess the dietary and lifestyle habit changes that occurred during home confinement in Spain.

METHODS

An European online survey was launched in April 2020. This included 70 questions on sociodemographic characteristics, lifestyle, dietary habits, including key Mediterranean diet (MedDiet) foods. A total of 945 Spanish adults from 1268 European that completed the online survey were included in the analysis.

RESULTS

Most of the Spanish participants adopted healthier dietary habits during home lockdown, which was translated to a higher MedDiet adherence. However, a negative impact on physical activity levels, sleep quality or smoking rates was observed. Low MedDiet adherence was associated with a higher risk of weight gain (OR = 1.53, CI 1.1-2.1; p = 0.016), while no snacking between meals reduced the risk by 80% (OR = 0.20, CI 0.09-0.45, p < 0.001) and eating more quantity, considering portion size, increased body weight gain risk almost sixfold more.

CONCLUSION

To conclude, although dietary habits were improved during home lockdown, certain unhealthy behaviours (e.g. increased snacking between meals, increased food intake, and an increase in sedentary behaviour) were increased.

Nutritional Behaviors, Vitamin Supplementation and Physical Activity among Polish Adults during the COVID-19 Pandemic

The COVID-19 pandemic and its consequences, including social isolation, movement restrictions and work instability have altered many people’s nutritional behaviors and daily lifestyle. The aim of the study was to evaluate the influence of the COVID-19 pandemic on selected eating habits, physical activity and daily lifestyle changes of Polish adults (n = 145). The self-designed and anonymous questionnaire was available online from the 1 May 2021 to the 15 May 2021. In general, 60% of respondents declared that the COVID-19 pandemic did not affect their dietary habits, whereas 26% of surveyed individuals answered in the affirmative. The effect of the COVID-19 pandemic on changing dietary habits was differentiated by age (Pearson’s χ² = 12.604; p = 0.0134). The number of meals consumed by respondents per day differed across gender groups (Pearson’s χ² = 9.653; df = 4; p = 0.0466). An increase in body weight during the COVID-19 pandemic was reported by 43% of women and 7.6% of surveyed men. Additionally, hybrid working women declared most often an increase in body mass independent of age, education level and living place. Moreover, the majority of respondents who reported the effect of the pandemic on changing dietary habits also declared more frequent sweets consumption. The study revealed that respondents who stated more frequent sweets consumption during the COVID-19 pandemic were more likely associated with an increase in body mass (OR = 6.75, 95% CI, 6.75–91.25). No increase in the consumption of vitamin D, C and Mg supplements and pickled products was found.

Emotional eating behaviors during the COVID-19 pandemic: A cross-sectional study

Background & aims

The study aimed to evaluate emotional eating tendency of Turkish individuals during COVID-19 pandemic.

Methods

The study comprised an online questionnaire and it was conducted from August to September 2020. The survey was distributed through social networks.

Results

A total of 1626 adults have been included in the study, aged between 18 and 65 years (69.6% females and 30.4% males). The average BMI of all participants was 24.4 ± 4.7 kg/m², 6% were underweight, and 11.6% were obese. A total of 32.7% of the participants had an increase in appetite and 34.4% had a weight gain. It was found that most of the participants (75.7%) were emotional eaters at different levels. Emotional eating was more common in obese people (43.5%) than normal weight (33.5%) and underweight (18.4%) people. It was examined the increasing food intake according to the BMI, the obese increased the consumption of fresh vegetables, fruits, pastries, and, eggs; underweight increased the consumption of fresh vegetables and fruits, milk and, eggs. As in other countries, a weight gain was observed in the individuals. However, the participants resorted to emotional eating to cope with negative emotions such as depression, anxiety, and stress caused by the pandemic.

Conclusions

In this study, it has been provided preliminary data that can be used in future studies to determine the emotional eating behaviors during the COVID-19 pandemic.

Is COVID-19 a threat or an opportunity for healthy eating? An exploration of the factors that moderate the impact of the pandemic on eating habits in Uruguay

In May 2020, Uruguay was one of the few Latin American countries that had managed to control the outbreak of COVID-19 without mandatory curfews or quarantines. However, several social distancing measures created a major disruption in different aspects of the daily life of Uruguayan citizens. In this context, the objectives of the present work were i) to identify changes in eating habits perceived by Uruguayan citizens as a consequence of the COVID-19 pandemic, and ii) to explore factors associated with different perceived changes on eating habits. A cross-sectional online study was conducted with 891 participants, recruited using an advertisement on Facebook and Instagram. Fifty-one percent of the participants indicated that their eating habits had changed since the detection of the first cases of COVID-19 in Uruguay. Large heterogeneity in the categorization of the changes existed: 45% of the participants regarded the changes as positive, 32% as negative and 23% as neither positive nor negative. A multinomial logistic regression analysis was used to study the influence of explanatory variables in the likelihood of belonging to groups who reported different changes in eating habits (no changes, positive, negative, or neither positive nor negative changes). Household income and reliance on instrumental and emotional support increased the likelihood of reporting positive changes in eating habits, whereas negative changes were associated with a reduction in household income due to COVID-19 and the coping strategies self-distraction and self-blaming. Insights for policy making to reinforce positive effects and minimize threats to healthy eating are discussed.

Impact of staying at home measures during COVID-19 pandemic on the lifestyle of Qatar's population: Perceived changes in diet, physical activity, and body weight

Countries worldwide imposed different swift protective measures such as movement restrictions and staying at home measures to mitigate the spread of COVID-19. Despite the benefits gained from such measures in containing the spread of the infection, adverse lifestyle consequences happened. In this study we aimed to assess the impact of staying at home measures imposed during COVID-19 pandemic on dietary behaviors, physical activity, and body weight in Qatar's population. A population based cross sectional survey was conducted between December 2020 and February 2021 targeting adults ≥18 years. A total of 1408 participants completed the survey in four languages. Concerning the overall diet perception, 27.8%, and 33.2% perceived that their overall diet has become less healthy, or healthier respectively, since the start of staying at home measures. Almost half of all participants reported weight gain. Participants reported increased sitting/reclining time (1.94 h/day mean increase), screen times (2.05 h/day mean increase) with p < 0.001, and decreased exercise time (0.11 h/day mean reduction) with p < 0.001. The ordinal logistic regression analysis showed that the numbers of unhealthy dietary behaviors adopted by participants, and adverse changes in exercise, setting/reclining and screen times were significantly associated with weight gain. The results of this study indicate that peoples in Qatar have experienced adverse lifestyle changes with regard to their diet, physical activity, and body weight. More emphasis should be put on encouraging people to maintain healthy lifestyle behaviors during home confinement measures that might be imposed during any public health crises or any potential future outbreaks.

Formation of Bioactive Tyrosine Derivatives during Sprouting and Fermenting of Selected Whole Grains

Sprouting is a popular method in cereal processing because sprouted grains are accepted to have high nutritional value. The increased proteolytic activity by sprouting increases the free amino acids in grains. It was hypothesized that an increased amount of tyrosine can be utilized by microorganisms during fermentation to form higher amounts of bioactive tyrosine derivatives. Sprouting increased the tyrosine and tyramine contents considerably, but increases and decreases in l-3,4-dihydroxyphenylalanine (l-DOPA) and dopamine were specific to the cereal. More tyramine, l-DOPA, and dopamine formation was observed during sourdough fermentation than that in yeast fermentation. As a result of the combined application of sprouting (48 h at 20 °C) and sourdough fermentation (36 h at 30 °C), the amounts of dopamine, l-DOPA, and tyramine found in rye were 27, 50, and 136 mg/kg, respectively. Cereal products rich in dopamine and l-DOPA can thus be produced as functional food ingredients with their positive effects on human health and mood.