Appetite Control Research Articles

Effects of the Type and Emulsification of Oil on Postprandial Appetite Responses in Healthy Young Adults

ObjectivesPrevious studies revealed that consuming different types of oil or the same type of oil but whether being emulsified could result in a different subsequent food intake. While these results suggest that different types of oils or emulsification could affect appetite control, very limited data exist. Therefore, this study aimed to investigate the impact of type and emulsification of oil on postprandial appetite responses.MethodsThis is a randomized, controlled, double-blinded crossover study and 16 healthy males and females aged between 21 and 29 participated in the study. All participants consumed a high-fat isocaloric breakfast meal containing 29 g of one of the following four oil: i) olive oil-water non-emulsified; ii) olive oil-water emulsified; (iv) coconut oil-water non-emulsified, v) coconut oil-water emulsified. Five hours after the test breakfast meal, subjects received a standard low-fat lunch. Six appetites components including hunger, desire to eat, prospective consumption, fullness, nausea and bloating were evaluated over a 10-hour postprandial duration by using visual analogue scales (VAS). The net incremental area under the curve (iAUC) of appetite VAS was calculated by the trapezoidal method.ResultsThe iAUC value (mean ± SE) of hunger VAS was higher with the oil emulsified group (-512.2 ± 137.4) than the oil non-emulsified group (-785.4 ± 132.9) over a 5-hour postprandial period (P < 0.05), but the difference became insignificant over a 10-hour postprandial period. On the other hand, the coconut oil group resulted in higher fullness VAS than the olive oil group (P < 0.05), for both iAUC0-5 hour (coconut oil: 813.3 ± 146.0; olive oil: 575.4 ± 139.8) and iAUC0-10 hour values (coconut oil: 1,785.9 ± 311.3; olive oil: 1,368.5 ± 306.3). There is no interaction effect of the emulsification and the type of oil on all the six subjective appetites VAS during the postprandial state.ConclusionsThe type and emulsification of oil in a high-fat meal could cause differential appetite responses over a certain postprandial duration. Physiological measures, such as appetite-regulating hormones, energy expenditure and substrate oxidation rates, are necessary to elucidate the differences in subjective appetite responses in future studies.Funding SourcesNational University of Singapore and Agency for Science, Technology and Research, Industry Alignment.

0846 Severe OSA in a 17yr old patient with Prader Willi Syndrome and poorly controlled Diabetes Mellitus

Abstract Introduction Prader Willi Syndrome (PWS), while rare, is the most common genetic cause of obesity. It is caused by a functional loss of paternally expressed genes from chromosomal region 15q11-13. PWS is characterized by short stature, neurodevelopmental delay, obsessive-compulsive behaviors, hypothalamic dysfunction, and hyperphagia, associated with an aberrant satiety response and elevated levels of ghrelin. Excessive daytime sleepiness (EDS) and sleep-disordered breathing (SDB), including obstructive sleep apnea (OSA) and central sleep apnea, are common. Report of Cases: A 17-year-old male, with PWS, morbid obesity, autism, and diabetes mellitus (DM) type-2 was referred for evaluation of snoring and EDS (Epworth Sleepiness Score 16). He had recently been admitted with diabetic ketoacidosis associated with binge eating. He had no prior sleep testing. He denied sleep paralysis, hypnagogic/hypnopompic hallucinations, and cataplexy. He had a body mass index of 54 kg/m2 with short stature (1.6m). On exam, he had a Mallampati score of 4 and 1+ tonsils. A recent echocardiogram was normal. Polysomnography showed sleep latency of 10 mins, apnea-hypopnea index (AHI) of 148/hr, nadir oxygen saturation of 73%, with 45% of total sleep time &amp;lt; 90%. Hypoventilation was not present. He was prescribed auto-titrating positive airway pressure (PAP) therapy. His mother was instructed to start locking access to food again. He was treated with insulin and metformin, with a plan to start on a glucagon-like peptide-1 (GLP-1) agonist. He had been on growth hormone (GH) previously, but in the context of his other morbidities, it was not reinitiated. Conclusion It is critical to screen and monitor patients with PWS for OSA, as SDB occurs in almost 70%. While PAP therapy may improve OSA, there is often residual EDS (likely due to underlying hypothalamic dysfunction), and alerting agents may be needed. GH can be considered for short stature but is contraindicated in patients with morbid obesity, untreated severe OSA, and uncontrolled diabetes. Management of diabetes, obesity, and hyperphagia in patients with PWS is challenging. Supervision and strict limitation of food intake using physical barriers are important. While data are limited, GLP-1 agonists may provide potential benefits for weight, glycemic, and appetite control in patients with PWS. Support (If Any)

Discovery and Characterization of the First Nonpeptide Antagonists for the Relaxin-3/RXFP3 System.

The neuropeptide relaxin-3/RXFP3 system is involved in many important physiological processes such as stress responses, appetite control, and motivation for reward. To date, pharmacological studies of RXFP3 have been limited to peptide ligands. In this study, we report the discovery of the first small-molecule antagonists of RXFP3 through a high-throughput screening campaign. Focused structure-activity relationship studies of the hit compound resulted in RLX-33 (33) that was able to inhibit relaxin-3 activity in a battery of functional assays. RLX-33 is selective for RXFP3 over RXFP1 and RXFP4, two related members in the relaxin/insulin superfamily, and has favorable pharmacokinetic properties for behavioral assessment. When administered to rats intraperitoneally, RLX-33 blocked food intake induced by the RXFP3-selective agonist R3/I5. Collectively, our findings demonstrated that RLX-33 represents a promising antagonist scaffold for the development of drugs targeting the relaxin-3/RXFP3 system.

Semen raphani weakened the action of ginseng under chronic fatigue condition

Ethnopharmacological relevanceFatigue is a kind of subhealth status and people paid much more attention on it. Ginseng is used to treating fatigue as a kind of qi -tonifying drug in Chinese medicine. In the traditional applications, there is a viewpoint that ginseng could not be used with semen raphani and supposed that semen raphani is a kind of qi regulating drug, which will reduce the qi invigorating effect of ginseng. However, the underlying combination mechanism of the two drugs remained unclear. Aim of the studyThe aim of this study is to explore whether ginseng can be used with semen raphani or not to remedy acute and chronic fatigue conditions. MethodsWe used normal and weight-bearing swimming method combined with appetite control animals. The biochemical indexes in energy metabolism, antioxidant, regulating endocrine system and immunity capacities were performed to explore the antagonism effect of semen raphani on ginseng under acute and chronic fatigue conditions. The serum and urine metabolomics were investigated using liquid chromatography quadrupole time-of-flight mass spectrometry (LC-QTOF/MS). Fecal flora was analyzed via 16S rRNA amplicon sequencing. ResultsThe combination of ginseng with semen raphani have no influence on acute fatigue effect compared with ginseng alone. Both can improve the exhausted swimming time, the activity of GSH-Px, LDH and Na+-K+-ATPase. Furthermore, the combination of ginseng with semen raphani can increase the urine volume of rats and down-regulate the content of AQP-3, which can alleviate the “fireness” side-effect of ginseng. But the abundance and diversity of bacterial are decreased under acute fatigue experiment. Both the combination of ginseng with semen raphani and ginseng alone can remedy chronic-fatigue. They can also regulate the endocrine system, immune system, citric acid cycle metabolism, tryptophan metabolism, fatty acid metabolism, glycolysis/gluconeogenesis, etc. Furthermore, they can promote substance metabolism and energy metabolism in qi deficiency rats, and increase the abundance and diversities of the flora. While with the increased content of semen raphani, the combination of ginseng and semen raphani weaken the capacity of antioxidant, lactic acid metabolism, energy metabolism, flora diversity and regulation of endocrine system. ConclusionCompared with ginseng alone, the combination of ginseng with semen raphani can weaken the qi invigorating ability under chronic fatigue condition. The more ratios of semen raphani is in the combination of the two drugs, the less the power of treating chronic fatigue is. Compared with ginseng alone, the combination of ginseng with semen raphani have no influence on the qi invigorating ability under actue fatigue experiment. But the combination of ginseng with semen raphani will benefit for the “fireness” side-effect of ginseng.

Appetite Control With Ageing

The anorexia of ageing, a reduction in food intake with increased age, is associated with negative health outcomes such as sarcopenia frailty, cachexia morbidity and mortality. Pharmacological agents such as appetite stimulants have been a major focus to combat the anorexia of ageing; however, these medications are linked to various adverse side effects. Therefore, understanding the physiological causes of reduced appetite may lead to the creation of innovative intervention strategies in the ageing population. Current research has identified the pro-opiomelanocortin (POMC) and Agouti-related peptide (AgRP) neuronal subsets of the arcuate nucleus (ARC) as the centre of appetite regulation. This review investigates the current understanding of appetite regulation and subsequent dysregulation with age, and the age-associated changes in the anorectic (appetite-suppression) and orexigenic (appetite-stimulating) pathways, thereby implicating the POMC and AgRP neurons. It primarily investigates the physiological changes underlying appetite reduction with ageing to orient future interventions to combat the anorexia of ageing.

P450. Pilot Study Evaluation of Psilocybin Therapy for Anorexia Nervosa: Safety, Acceptability, and Preliminary Efficacy

There has been minimal advancement in clinical treatments for anorexia nervosa (AN) over the past several decades. Considerable evidence suggests that altered brain serotonin (5-HT) function contributes to dysregulation of appetite, mood, motivation, and impulse control in AN. Psilocybin is a psychedelic whose mechanism of action is mediated by serotonin 2A (5-HT2A) receptor agonism, supporting the possibility that this drug might reverse AN symptoms.

Cytokine-inducible SH2 domain containing protein contributes to regulation of adiposity, food intake, and glucose metabolism.

The cytokine-inducible SH2 domain containing protein (CISH) is the founding member of the suppressor of cytokine signaling (SOCS) family of negative feedback regulators and has been shown to be a physiological regulator of signaling in immune cells. This study sought to investigate novel functions for CISH outside of the immune system. Mice deficient in CISH were generated and analyzed using a range of metabolic and other parameters, including in response to a high fat diet and leptin administration. CISH knockout mice possessed decreased body fat and showed resistance to diet-induced obesity. This was associated with reduced food intake, but unaltered energy expenditure and microbiota composition. CISH ablation resulted in reduced basal expression of the orexigenic Agrp gene in the arcuate nucleus (ARC) region of the brain. Cish was basally expressed in the ARC, with evidence of co-expression with the leptin receptor (Lepr) gene in Agrp-positive neurons. CISH-deficient mice also showed enhanced leptin responsiveness, although Cish expression was not itself modulated by leptin. CISH-deficient mice additionally exhibited improved insulin sensitivity on a high-fat diet, but not glucose tolerance despite reduced body weight. These data identify CISH as an important regulator of homeostasis through impacts on appetite control, mediated at least in part by negative regulation of the anorexigenic effects of leptin, and impacts on glucose metabolism.

Bacterial sensing via neuronal Nod2 regulates appetite and body temperature.

Gut bacteria influence brain functions and metabolism. We investigated whether this influence can be mediated by direct sensing of bacterial cell wall components by brain neurons. In mice, we found that bacterial peptidoglycan plays a major role in mediating gut-brain communication via the Nod2 receptor. Peptidoglycan-derived muropeptides reach the brain and alter the activity of a subset of brain neurons that express Nod2. Activation of Nod2 in hypothalamic inhibitory neurons is essential for proper appetite and body temperature control, primarily in females. This study identifies a microbe-sensing mechanism that regulates feeding behavior and host metabolism.

Impaired trigeminal control of ingestive behavior in the Prrxl1-/- mouse is associated with a lemniscal-biased orosensory deafferentation.

Although peripheral deafferentation studies have demonstrated a critical role for trigeminal afference in modulating the orosensorimotor control of eating and drinking, the central trigeminal pathways mediating that control, as well as the timescale of control, remain to be elucidated. In rodents, three ascending somatosensory pathways process and relay orofacial mechanosensory input: the lemniscal, paralemniscal, and extralemniscal. Two of these pathways (the lemniscal and extralemniscal) exhibit highly structured topographic representations of the orofacial sensory surface, as exemplified by the one-to-one somatotopic mapping between vibrissae on the animals’ face and barrelettes in brainstem, barreloids in thalamus, and barrels in cortex. Here we use the Prrxl1 knockout mouse model (also known as the DRG11 knockout) to investigate ingestive behavior deficits that may be associated with disruption of the lemniscal pathway. The Prrxl1 deletion disrupts somatotopic patterning and axonal projections throughout the lemniscal pathway but spares patterning in the extralemniscal nucleus. Our data reveal an imprecise and inefficient ingestive phenotype. Drinking behavior exhibits deficits on the timescales of milliseconds to seconds. Eating behavior shows deficits over an even broader range of timescales. An analysis of food acquisition and consummatory rate showed deficits on the timescale of seconds, and analysis of body weight suggested deficits on the scale of long term appetitive control. We suggest that ordered assembly of trigeminal sensory information along the lemniscal pathway is critical for the rapid and precise modulation of motor circuits driving eating and drinking action sequences.

Effects of ileal glucose infusion on enteropancreatic hormone secretion in humans: relationship to glucose absorption

BackgroundsThe distal small intestine plays an important role in regulating the secretion of entero-pancreatic hormones that are critical to the control of glucose metabolism and appetite, but the quantitative contribution of a specific segment to these effects is unknown. PurposesTo determine the effects of 30 cm of the ileum exposed to glucose on the secretion of ghrelin, glucagon-like peptide-1 (GLP-1), glucose-dependent insulinotropic polypeptide (GIP) insulin, C-peptide and glucagon, in relation to glucose absorption in non-diabetic subjects. Basic procedures10 non-diabetic subjects with a loop ileostomy after early-stage rectal cancer resection were studied on 2 days in a double-blind, randomized and crossover fashion, when a catheter was inserted retrogradely 30 cm from the ileostomy for infusion of a glucose solution containing 30 g glucose and 3 g 3-O-methylglucose (as a marker of active glucose absorption), or 0.9% saline, over 60 min. Ghrelin, GIP, GLP-1, insulin, C-peptide, glucagon and ileal glucose absorption (from concentrations of 3-O-methylglucose in serum and glucose in ileostomy effluent) were measured over 180 min. Main findings12.0 ± 1.2 g glucose was absorbed over 180 min. Compared to saline, ileal glucose resulted in minimal increases in blood glucose and plasma insulin and C-peptide, but substantial increases in plasma GLP-1, without affecting ghrelin, GIP or glucagon. The magnitude of the GLP-1 response to glucose was strongly related to the increase in serum 3-O-methylglucose. Principal conclusionsStimulation of the terminal ileum by glucose, even over a short length (30 cm), induces substantial GLP-1 release, coupled primarily to active glucose absorption.Clinical registration:NCT05030376 (ClinicalTrials.gov).

The rs483145 polymorphism of MC4R gene is not associated with obesity in the Chilean population: Results of GENADIO study

IntroductionThe melanocortin receptor 4 (MC4R) participates in the control of appetite at the level of the central nervous system, through the leptin-melanocortin pathway. An association between different polymorphisms of the MC4R gene and obesity has been reported. However, there are few studies of the rs483145 single nucleotide polymorphism (SNP) of this gene. ObjectiveTo investigate its prevalence and association with adiposity markers in Chilean adults. MethodsThe prevalence of SNP rs483145, of the MC4R gene, was determined in 259 participants of the GENADIO study (genes, environment, diabetes and obesity) by means of real-time polymerase chain reaction (PCR). The association between the risk allele of MC4R (A) and adiposity markers (body weight, body mass index, fat mass percentage, hip circumference, waist circumference, waist-to-hip ratio) was performed by linear regression analysis and adjusted for confusion variables (socio-demographic and physic activity) using three statistical models. ResultsIt was determined that the prevalence of the risk allele (A) of the SNP rs483145 of the MC4R gene is 24.5% in the Chilean adult population included in this study, without finding an association with any of the adiposity markers studied, both in adjusted and unadjusted models. ConclusionThe presence of the risk allele of SNP rs483145 of the MC4R gene is not associated with adiposity markers in the Chilean adult population studied. New studies with a bigger sample size will be necessary to confirm these results.

Basal blood concentrations of some orexigenic and anorexigenic hormones in obese and nonobese individuals according to blood groups.

Obesity is a serious public health problem associated with excessive food intake. Regulation of food intake in highly organized organisms is under the control of a large number of orexigenic and anorexigenic molecules. Therefore, the main purpose of this study has been to determine the relationship between obesity and some of the circulating orexigenic and anorexigenic peptides that have a role in appetite control and to determine whether the concentrations of these molecules differ according to blood groups. The study included 400 individuals of whom 100 were obese women, 100 obese men, 100 healthy men and 100 healthy women. Obese women and men were divided into 4 groups, according to their blood groups. In the control group, healthy women and healthy men were similarly divided into 4 blood groups. Each blood group within the groups, therefore, had 25 participants. When leptin, nesfatin-1, obestatin and neuropeptide-Y, ghrelin and galanin levels of the control group and obese participants were compared, regardless of blood groups, leptin, nesfatin-1, obestatin and neuropeptide-Y were significantly higher, whereas only the ghrelin levels were significantly lower in obese patients. When the amounts of these hormones were measured according to gender, the situation was similar. When leptin, nesfatin-1, obestatin and neuropeptide-Y values of the control and obese participants' blood groups were compared with each other; these hormones were high in all blood groups; however, leptin levels in A blood group, nesfatin-1 levels in AB and O blood group, obestatin levels in AB blood group, neuropeptide-Y levels in A, B, AB blood groups were significantly higher. When the ghrelin levels of the blood groups in the control group and obese participants were compared, it was only significantly lower in the AB blood group. The ghrelin levels in the other blood groups of the obese individuals were again low, but not significantly so. When the distribution of hormones according to gender was evaluated, a situation parallel to the above results was recorded. Leptin, nesfatin-1, obestatin and neuropeptide-Y and galanin levels of obese individuals were significantly higher than the control values, whereas the ghrelin values were significantly lower regardless of blood groups. Also, these hormones in blood partly varied with ABO blood groups. These different concentrations of hormones in ABO blood groups might be related with stimulation or suppression of appetite in human. However, further studies in other ethnic groups are needed to confirm these results.

Brain circuits for promoting homeostatic and non-homeostatic appetites.

As the principal means of acquiring nutrients, feeding behavior is indispensable to the survival and well-being of animals. In response to energy or nutrient deficits, animals seek and consume food to maintain energy homeostasis. On the other hand, even when animals are calorically replete, non-homeostatic factors, such as the sight, smell, and taste of palatable food, or environmental cues that predict food, can stimulate feeding behavior. These homeostatic and non-homeostatic factors have traditionally been investigated separately, but a growing body of literature highlights that these factors work synergistically to promote feeding behavior. Furthermore, recent breakthroughs in cell type-specific and circuit-specific labeling, recording, and manipulation techniques have markedly accelerated the discovery of well-defined neural populations underlying homeostatic and non-homeostatic appetite control, as well as overlapping circuits that contribute to both types of appetite. This review aims to provide an update on our understanding of the neural circuit mechanisms for promoting homeostatic and non-homeostatic appetites, focusing on the function of recently identified, genetically defined cell types.

Korean Medicine with Self-monitoring for Weight Control and Factors Associated with Weight Loss: a Retrospective Observational Study

Objectives: The purpose of this study was to investigate the effect of weight loss in Korean Medicine (KM) obesity treatment combined with self-monitoring and to identify the relevant factors which are related to successful weight loss. In addition to this, adverse events reported by the patients were analyzed to assess the safety of KM treatments for obesityMethods: This was a retrospective observational study that analyzed the medical records of the patients that participated in the 10-week of KM treatment. All patients took herbal medicine for weight loss and were instructed to reduce calorie intake and adhere to self-monitoring. Clinical data including body weight were collected for evaluating the effect of the treatments. Behavior factors affecting weight loss were collected. The correlation between each factor and weight loss was analyzed. Adverse events (AEs) were collected at each time to evaluate the safety of the intervention.Results: One hundred eighteen patients’ records were included in this study. The average weight loss was 7.64kg(74.59kg to 66.95kg). 94.9% of patients lost 5% or more of their initial weight. The degree of weight loss was identified to be related to self-assessment of diet control and self-assessment of appetite control. The average self-weighing frequency significantly increased(2.45 times/week before treatment and 4.70 times/weeks during treatment). Constipation, insomnia, and dizziness were found to be the most frequent AEs, and except for one case, most AEs were mild cases.Conclusion: From this study, we found that KM obesity treatment combined with self-monitoring showed significant weight loss without serious AE.

Distinct Firing Activities of the Hypothalamic Arcuate Nucleus Neurons to Appetite Hormones.

The hypothalamic arcuate nucleus (Arc) is a central unit that controls the appetite through the integration of metabolic, hormonal, and neuronal afferent inputs. Agouti-related protein (AgRP), proopiomelanocortin (POMC), and dopaminergic neurons in the Arc differentially regulate feeding behaviors in response to hunger, satiety, and appetite, respectively. At the time of writing, the anatomical and electrophysiological characterization of these three neurons has not yet been intensively explored. Here, we interrogated the overall characterization of AgRP, POMC, and dopaminergic neurons using genetic mouse models, immunohistochemistry, and whole-cell patch recordings. We identified the distinct geographical location and intrinsic properties of each neuron in the Arc with the transgenic lines labelled with cell-specific reporter proteins. Moreover, AgRP, POMC, and dopaminergic neurons had different firing activities to ghrelin and leptin treatments. Ghrelin led to the increased firing rate of dopaminergic and AgRP neurons, and the decreased firing rate of POMC. In sharp contrast, leptin resulted in the decreased firing rate of AgRP neurons and the increased firing rate of POMC neurons, while it did not change the firing rate of dopaminergic neurons in Arc. These findings demonstrate the anatomical and physiological uniqueness of three hypothalamic Arc neurons to appetite control.

Changes in Appetite-Dependent Hormones and Body Composition After 8 Weeks of High-Intensity Interval Training and Vitamin D Supplementation in Sedentary Overweight Men.

Exercise and diet are important factors for energy balance and appetite regulation. The aim of this study was to investigate the effect of 8 weeks High Intensity Interval Training (HIIT) and vitamin D3 supplementation in sedentary overweight men. Forty-eight participants were randomly assigned to one of the following four groups (n = 12): HIIT + VitD, HIIT + placebo (3 sessions per week, 10 × 1 min interval cycling at 90–100% VO2peak separated by 1 min active recovery at 15% VO2peakfor 8 weeks), Vit D and control groups. Participants received 2,000 IU/day 25 (OH) D3 or placebo. Measurements were taken pre and post training after 10 h overnight fasting. Insulin, weight, BMI and body fat percentage were significantly decreased, but PYY was significantly increased in the HIIT + Vit D and HIIT + placebo groups (p = 0.001 and p = 0.001, respectively) after 8 weeks of HIIT. Insulin (p = 0.009, p = 0.001), weight, BMI and body fat percentage (p = 0.001, p = 0.001) were significantly lower in the HIIT + Vit D and HIIT + placebo groups compared to the Vit D and control groups. However, PYY was significantly higher in the HIIT + Vit D group compared to the Vit D (p = 0.025) and control groups (p = 0.007) and also in the HIIT + placebo group compared to the Vit D (p = 0.037) and control groups (p = 0.032) after 8 weeks of HIIT. The combination of regular HIIT with vitamin D supplementation has a effect on appetite control and body composition.

Myokines in Appetite Control and Energy Balance

Efficacy of obesity treatments varies between individuals, highlighting the presence of responders and non-responders. Whilst exercise alone or exercise combined with diet leads to underwhelming weight loss for most, there exist super responders losing significant weight. Furthermore, in response to weight loss, the majority but not all patients tend to regain weight. Within the biopsychosocial model, biology as a determinant of response has been underappreciated. The understanding of the role that organs beyond adipose tissue and the gastrointestinal tract play in appetite control and body weight regulation has developed in recent years. The aim of this review is to highlight potential myokines that may be important in appetite physiology and overall energy balance. A number of attractive targets are described that warrant further investigation. A deeper understanding of how these myokines may drive feeding behaviours has the potential to improve measures to prevent and treat obesity through a precision medicine approach.

Creating texturally tuneable, low calorie and palatable noodle-like food assemblies via microfluidics

This paper showcases an end-to-end study encompassing the design and prototyping of novel food assemblies using hydrocolloids via microfluidic processing and a detailed assessment of their impact and performance in both in vitro and in vivo contexts. We demonstrated the creation of low-calorie noodle-like food assemblies from mixtures of food hydrocolloids - calcium alginate and soy protein, through microfluidic extrusion and gelation techniques. We characterized the textural and sensorial features of the food assemblies and showed how they can be tuned to mimic key organoleptic features of commercial noodle products through internal spatial segregation of the hydrocolloid materials enabled by microfluidic processing. We also demonstrated various in vivo physiological responses to the food assemblies and examined their potential in the endocrinal control of appetite. Sensory evaluations revealed that participants generally had a similar liking for the microfluidic food assemblies as compared to commercially available noodles. Clinical evaluations on varying microfluidic noodle assemblies reflected minimal changes in postprandial glucose and insulin levels, while eliciting differential gut hormonal (ghrelin and GLP-1) responses from commercial noodles and from each other. However, subjective satiety levels from these assemblies remain comparable with commercial noodles. Our work highlights the potential of microfluidic techniques in precision food design. The food assemblies demonstrated in this work are a functional and adaptable platform for macro- and micronutrient delivery while ensuring nutrient stability, which can be specifically tailored to address targeted nutritional needs.

Determination of Polyphenols Content and Antioxidant Activity of Citrus sinensis Fruit Peel

Citrus fruits have long been qualified as veritable foods in view of the many therapeutic benefits they bring to the body. Several researchers have stud-ied the relationship between the bioactive compounds of Citrus and the health benefits and reduction of the risk of disease. Citrus sinensis, used in the food industry and its extracts have also been used in traditional medicine to activate vital energy, circulation, and weight loss, and appetite control. However, limited efforts have been made on collecting data on antioxidant potential of peels orange from the northern region of Algeria. Our study, therefore, focuses on the evaluation of total polyphenols compounds and in vitro assessment of their antioxidant potential of peels orange from the northern region of Algeria. The ethyl acetate and n-butanolic fractions from peels orange have been tested for their antioxidant activities and their lipid peroxidation inhibiting effects. The total phenolic and flavonoids content showed high levels. The preliminary phytochemical screening of tannins, phenolic compounds, flavonoids, coumarin, and alkaloids was also used. DPPH assay possesses strong potency to scavenge free radicals. The NO. radi-cal scavenging test exerts a good inhibitory effect. Furthermore, orange peels have been shown to suppress the lipid peroxidation of linoleic acid. Results further revealed a strong correlation between antioxidant effects and polyphenolic compounds. The high antioxidant activity of peel orange suggests that it could serve as a good natural antioxidant additive or food dietary supplement.

Neural signalling of gut mechanosensation in ingestive and digestive processes.

Eating and drinking generate sequential mechanosensory signals along the digestive tract. These signals are communicated to the brain for the timely initiation and regulation of diverse ingestive and digestive processes - ranging from appetite control and tactile perception to gut motility, digestive fluid secretion and defecation - that are vital for the proper intake, breakdown and absorption of nutrients and water. Gut mechanosensation has been investigated for over a century as a common pillar of energy, fluid and gastrointestinal homeostasis, and recent discoveries of specific mechanoreceptors, contributing ion channels and the well-defined circuits underlying gut mechanosensation signalling and function have further expanded our understanding of ingestive and digestive processes at the molecular and cellular levels. In this Review, we discuss our current understanding of the generation of mechanosensory signals fromthe digestive periphery, the neural afferent pathways that relay these signals to the brain and the neural circuit mechanisms that control ingestive and digestive processes, focusing on thefour major digestive tract parts: the oral and pharyngeal cavities, oesophagus, stomach and intestines. We also discuss the clinical implications of gut mechanosensation in ingestive and digestive disorders.