Resistant Starch Supplementation Research Articles

The Impact of Yoyo Dieting and Resistant Starch on Weight Loss and Gut Microbiome in C57Bl/6 Mice.

Cyclic weight loss and subsequent regain after dieting and non-dieting periods, a phenomenon termed yoyo dieting, places individuals at greater risk of metabolic complications and alters gut microbiome composition. Resistant starch (RS) improves gut health and systemic metabolism. This study aimed to investigate the effect of yoyo dieting and RS on the metabolism and gut microbiome. C57BL/6 mice were assigned to 6 diets for 20 weeks, including control, high fat (HF), yoyo (alternating HF and control diets every 5 weeks), control with RS, HF with RS, and yoyo with RS. Metabolic outcomes and microbiota profiling using 16S rRNA sequencing were examined. Yoyo dieting resulted in short-term weight loss, which led to improved liver health and insulin tolerance but also a greater rate of weight gain compared to continuous HF feeding, as well as a different microbiota profile that was in an intermediate configuration between the control and HF states. Mice fed HF and yoyo diets supplemented with RS gained less weight than those fed without RS. RS supplementation in yoyo mice appeared to shift the gut microbiota composition closer to the control state. In conclusion, yoyo dieting leads to obesity relapse, and increased RS intake reduces weight gain and might help prevent rapid weight regain via gut microbiome restoration.

Resistant starch reduces glycolysis by HK2 and suppresses high-fructose corn syrup-induced colon tumorigenesis

BackgroundThe intake of high-fructose corn syrup (HFCS) may increase the risk of colorectal cancer (CRC). This study aimed to explore the potential effects and mechanisms of resistant starch (RS) in HFCS-induced colon tumorigenesis.MethodsThe azoxymethane/dextran sodium sulfate (AOM/DSS) and ApcMin/+ mice models were used to investigate the roles of HFCS and RS in CRC in vivo. An immunohistochemistry (IHC) staining analysis was used to detect the expression of proliferation-related proteins in tissues. 16S rRNA sequencing for microbial community, gas chromatography for short-chain fatty acids (SCFAs), and mass spectrometry analysis for glycolysis products in the intestines were performed. Furthermore, lactic acid assay kit was used to detect the glycolysis levels in vitro.ResultsRS suppressed HFCS-induced colon tumorigenesis through reshaping the microbial community. Mechanistically, the alteration of the microbial community after RS supplement increased the levels of intestinal SCFAs, especially butyrate, leading to the suppression of glycolysis and CRC cell proliferation by downregulating HK2.ConclusionsOur study identified RS as a candidate of protective factors in CRC and may provide a potential target for HFCS-related CRC treatment.

Effects of Pinto Bean and Resistant Starch Supplementation on Memory and Cognition in an Estrogen Deficiency Mouse Model

Effects of Pinto Bean and Resistant Starch Supplementation on Memory and Cognition in an Estrogen Deficiency Mouse Model

Gut microbial features and dietary fiber intake predict gut microbiota response to resistant starch supplementation

ABSTRACT Resistant starch (RS) consumption can have beneficial effects on metabolic health, but the response, in terms of effects on the gut microbiota and host physiology, varies between individuals. Factors predicting the response to RS are not yet established and would be useful for developing precision nutrition approaches that maximize the benefits of dietary fiber intake. We sought to identify predictors of gut microbiota response to RS supplementation. We enrolled 76 healthy adults into a 7-week crossover study with 59 individuals completing the study. Participants consumed RS type 2 (RS2), RS type 4 (RS4), and digestible starch, for 10 d each with 5-d washout periods in between. We collected fecal and saliva samples and food records during each treatment period. We performed 16S rRNA gene sequencing and measured fecal short-chain fatty acids (SCFAs), salivary amylase (AMY1) gene copy number, and salivary amylase activity (SAA). Dietary fiber intake was predictive of the relative abundance of several amplicon sequence variants (ASVs) at the end of both RS treatments. AMY1-related metrics were not predictive of response to RS. SAA was only predictive of the relative abundance of one ASV after digestible starch supplementation. Interestingly, SCFA concentrations increased the most during digestible starch supplementation. Treatment order (the order of consumption of RS2 and RS4), alpha diversity, and a subset of ASVs were predictive of SCFA changes after RS supplementation. Based on our findings, dietary fiber intake and gut microbiome composition would be informative if assessed prior to recommending RS supplementation because these data can be used to predict changes in specific ASVs and fecal SCFA concentrations. These findings lay a foundation to support the premise that using a precision nutrition approach to optimize the benefits of dietary fibers such as RS could be an effective strategy to compensate for the low consumption of dietary fiber nationwide.

Dietary resistant starch enhances immune health of the kidney in diabetes via promoting microbially-derived metabolites and dampening neutrophil recruitment

BackgroundDietary-resistant starch is emerging as a potential therapeutic tool to limit the negative effects of diabetes on the kidneys. However, its metabolic and immunomodulatory effects have not yet been fully elucidated.MethodsSix-week-old db/db mice were fed a diet containing 12.5% resistant starch or a control diet matched for equivalent regular starch for 10 weeks. db/m mice receiving the control diet were utilised as non-diabetic controls. Freshly collected kidneys were digested for flow cytometry analysis of immune cell populations. Kidney injury was determined by measuring albuminuria, histology, and immunohistochemistry. Portal vein plasma was collected for targeted analysis of microbially-derived metabolites. Intestinal histology and tight junction protein expression were assessed.ResultsResistant starch limited the development of albuminuria in db/db mice. Diabetic db/db mice displayed a decline in portal vein plasma levels of acetate, propionate, and butyrate, which was increased with resistant starch supplementation. Diabetic db/db mice receiving resistant starch had a microbially-derived metabolite profile similar to that of non-diabetic db/m mice. The intestinal permeability markers lipopolysaccharide and lipopolysaccharide binding protein were increased in db/db mice consuming the control diet, which was not seen in db/db mice receiving resistant starch supplementation. Diabetes was associated with an increase in the kidney neutrophil population, neutrophil activation, number of C5aR1+ neutrophils, and urinary complement C5a excretion, all of which were reduced with resistant starch. These pro-inflammatory changes appear independent of fibrotic changes in the kidney.ConclusionsResistant starch supplementation in diabetes promotes beneficial circulating microbially-derived metabolites and improves intestinal permeability, accompanied by a modulation in the inflammatory profile of the kidney including neutrophil infiltration, complement activation, and albuminuria. These findings indicate that resistant starch can regulate immune and inflammatory responses in the kidney and support the therapeutic potential of resistant starch supplementation in diabetes on kidney health.

Effect of resistant starch supplementation on the diversity and composition of human gut microbiota: A systematic review and meta-analysis

Effect of resistant starch supplementation on the diversity and composition of human gut microbiota: A systematic review and meta-analysis

Effects of dietary crude protein content and resistant starch supplementation on growth performance, intestinal histomorphology and microbial metabolites in weaned pigs

ABSTRACT A 4-week study was conducted to evaluate the effects of dietary crude protein (CP) content and resistant starch (RS) supplementation on growth performance, intestinal histomorphology and microbial metabolites of weaned pigs. A total of 96 pigs (7.06 ± 0.45 kg body weight) were assigned to 1 of 4 diets in a randomised complete block design involving a 2 (CP levels) × 2 (without or with RS) factorial arrangement to give 8 replicate pens and 3 pigs per pen. Body weight and feed disappearance were recorded weekly, and the faecal consistency score was determined every morning. Blood was sampled on days 1, 14 and 28 from one pig per pen, and the same pig was euthanised on day 28 to collect ileal tissue and ileal and colon digesta. Data were analysed using the MIXED procedure of SAS. The average daily gain and gain:feed ratio were lower (p < 0.05) in pigs fed low crude protein (LCP) diets compared to those fed high CP (HCP) diets during week 3 and overall period. The analysed Lys, Met+Cys and Thr in feed were lower than calculated values, particularly in LCP diets, which may have affected performance. Pigs fed the LCP diets had longer (p < 0.05) ileal villi and higher villus height to crypt depth ratios than those fed the HCP diets, and RS supplementation increased (p < 0.05) ileal villus height. Interactions (p < 0.05) between dietary CP content and RS inclusion were observed for short-chain fatty acid concentration in the ileum and colon in phase 2. There was no difference in propionic acid (ileum) or butyric acid (colon) concentrations among pigs fed HCP diets, however, the butyric acid concentration increased in pigs fed the LCP diet when supplemented with RS. Reducing dietary CP lowered (p < 0.05) faecal score, plasma urea nitrogen and digesta ammonia content. Overall, feeding LCP diets reduced growth performance but improved gut morphology in weaned pigs. Feeding the LCP diet with RS supplementation modulated concentrations of ileal propionic acid and colonic butyric acid in weaned pigs.

Resistant starch intake facilitates weight loss in humans by reshaping the gut microbiota

Emerging evidence suggests that modulation of gut microbiota by dietary fibre may offer solutions for metabolic disorders. In a randomized placebo-controlled crossover design trial (ChiCTR-TTRCC-13003333) in 37 participants with overweight or obesity, we test whether resistant starch (RS) as a dietary supplement influences obesity-related outcomes. Here, we show that RS supplementation for 8 weeks can help to achieve weight loss (mean −2.8 kg) and improve insulin resistance in individuals with excess body weight. The benefits of RS are associated with changes in gut microbiota composition. Supplementation with Bifidobacterium adolescentis, a species that is markedly associated with the alleviation of obesity in the study participants, protects male mice from diet-induced obesity. Mechanistically, the RS-induced changes in the gut microbiota alter the bile acid profile, reduce inflammation by restoring the intestinal barrier and inhibit lipid absorption. We demonstrate that RS can facilitate weight loss at least partially through B. adolescentis and that the gut microbiota is essential for the action of RS.

Dietary resistant starch supplementation increases gut luminal deoxycholic acid abundance in mice

ABSTRACT Bile acids (BA) are among the most abundant metabolites produced by the gut microbiome. Primary BAs produced in the liver are converted by gut bacterial 7-α-dehydroxylation into secondary BAs, which can differentially regulate host health via signaling based on their varying affinity for BA receptors. Despite the importance of secondary BAs in host health, the regulation of 7-α-dehydroxylation and the role of diet in modulating this process is incompletely defined. Understanding this process could lead to dietary guidelines that beneficially shift BA metabolism. Dietary fiber regulates gut microbial composition and metabolite production. We tested the hypothesis that feeding mice a diet rich in a fermentable dietary fiber, resistant starch (RS), would alter gut bacterial BA metabolism. Male and female wild-type mice were fed a diet supplemented with RS or an isocaloric control diet (IC). Metabolic parameters were similar between groups. RS supplementation increased gut luminal deoxycholic acid (DCA) abundance. However, gut luminal cholic acid (CA) abundance, the substrate for 7-α-dehydroxylation in DCA production, was unaltered by RS. Further, RS supplementation did not change the mRNA expression of hepatic BA producing enzymes or ileal BA transporters. Metagenomic assessment of gut bacterial composition revealed no change in the relative abundance of bacteria known to perform 7-α-dehydroxylation. P. ginsenosidimutans and P. multiformis were positively correlated with gut luminal DCA abundance and increased in response to RS supplementation. These data demonstrate that RS supplementation enriches gut luminal DCA abundance without increasing the relative abundance of bacteria known to perform 7-α-dehydroxylation.

Effects of Resistant Starch Supplementation on Metabolic Parameters and Oxidative Stress in C57BL/6 Mice Fed With a High‐Fat Diet

Normolipid supplemented with resistant starch (RS) is a type of dietary fiber with prebiotic properties, potential action on intestinal permeability, and an effect on decreasing glycemic levels, presenting therapeutic potential for issues stemming from excess body fat and associated comorbidities, such as nonalcoholic fatty liver disease (NAFLD). Sixty C57BL/6 mice were allocated to the following diets for 4 months: control (C), normolipid rich in fiber (F), RS, high fat (HL), HL rich in fiber (HLF), and HL supplemented with RS (HLRS). The following parameters were analyzed: animal weight, body composition, food intake, fasting blood glucose, lipid profile, hepatic and intestinal histology, hepatic and intestinal oxidative stress, and assessment of short‐chain fatty acids in feces. Long‐term supplementation with high doses of RS effectively reduced body weight gain and decreased liver and retroperitoneal adipose tissue weights, blood glucose levels, alanine aminotransferase, and serum triglycerides. Intestinal histology showed that the high‐fat diet increased the total diameter of the intestinal lumen (846.81 ± 7.82) and reduced enteric muscle thickness (8.51 ± 0.51), while RS supplementation effectively improved these parameters (658.01 ± 3.82; 30.56 ± 0.66), also increased butyrate production, and reduced oxidative stress in the intestine. RS supplementation was effective in reducing weight, adiposity, and NAFLD in mice with diet‐induced obesity and metabolic syndrome (MS).

Dietary Resistant Starch Regulates Bile Acid Metabolism by Modulating the FXR/LRH-1 Signaling Pathway in Broilers

This study aimed to investigate the effects of dietary corn-resistant starch on the bile acid metabolism of broilers. In total, 80, 1-day-old male broilers were randomly distributed into two groups fed either the basic normal corn–soybean diet or a diet supplemented with 40 g/kg of corn-resistant starch. The results showed that dietary supplementation of 4% corn-resistant starch increased the F/G during the periods from 21 to 42 d. Resistant starch supplementation reduced the lipid levels in plasma, and the contents of total bile acids were increased with the altered bile acid profile in the ileum. A diet with corn resistant starch decreased the enzyme contents of the classical pathway of bile acid synthesis and activated the signaling pathway of FXR/LRH-1 in the liver. A decreased abundance of Clostridium cluster XIVa was found in the ileal digesta of the resistant starch group, and its abundance was negatively correlated with the level of lithocholic acid. In summary, the RS was effective at reducing broiler plasma and liver lipid levels, which was probably due to the change in bile acid synthesis and reabsorption capacities. These findings provided a unique landscape of the relationship between bile acid metabolism and resistant starch in broilers.

Sixteen Weeks Of Aerobic Training &amp; Resistant Starch Supplementation Reduce Indoxyl Sulphate In Kidney Patients

Sixteen Weeks Of Aerobic Training &amp; Resistant Starch Supplementation Reduce Indoxyl Sulphate In Kidney Patients

Resistant potato starch supplementation reduces serum histamine levels in healthy adults with links to attenuated intestinal permeability

Histamine from our diet or gut microbes can trigger gastrointestinal disturbances, and resistant potato starch (RPS) has previously been shown to alleviate these symptoms while increasing levels of health-associated bacteria such as Akkermansia through unknown mechanisms. Post hoc exploratory metabolomic analysis of serum amino acid, amine, and carnitine metabolites in participants consuming 3.5 g/day RPS or placebo (n = 48) was performed using liquid chromatography-mass spectrometry to determine whether RPS positively influences histamine metabolism and related parameters. Histamine levels were significantly reduced by RPS treatment, but histamine-degrading enzyme products were unaffected by RPS. RPS also reduced histamine-secreting Haemophilus and Lactobacillus. Further, metabolites associated with intestinal permeability, including 5-hydroxylysine, acetylspermidine, and short- and medium-chain carnitines ratios, were significantly reduced by RPS treatment, suggesting decreased serum histamine might be related to enhanced gut barrier function. These metabolomic findings expand the value of supplementing the diet with RPS.

268-LB: Dietary Resistant Starch Supplementation Upregulates Deoxycholic Acid Production in Mice

The gut microbiome plays an important role in the regulation of metabolic health, largely through the metabolites it produces, making it an important target for management and prevention of diabetes. Some of the most abundant metabolites produced by the gut microbiome are bile acids. Primary bile acids produced in the liver are converted into secondary bile acids by bacteria in the gut via 7-ɑ-dehydroxylation. These secondary bile acids are strong ligands for bile acid receptors known to improve glycemic regulation. However, the bacteria and enzymatic pathways involved in 7-ɑ-dehydroxylation have not been fully defined. Therefore, we are developing tools with which to study the dynamic regulation of gut bacterial 7-ɑ-dehydroxylation. In this study, we hypothesized that feeding mice a diet rich in resistant starch (RS) would alter the gut microbiome to favor bacteria capable of executing 7-ɑ-dehydroxylation. To test this, mice were fed a diet supplemented with RS or an isocaloric (IC) control diet. Profiling of gut luminal bile acids shows that RS supplementation proportionally increases the production of the secondary bile acid, deoxycholic acid (DCA) (DCA as a proportion of total bile acids in gut luminal contents: IC = 0.16 ± 0.03 RS = 0.55 ± 0.08, P = 0.001). RS tended to decrease unconjugated cholic acid (CA) concentrations, the substrate for 7-ɑ-dehydroxylation in DCA production, compared to IC-fed controls. Hepatic expression of the enzyme required for production of CA, Cyp8b1, did not differ between groups. Therefore, these data suggest that RS-induced increases in DCA are due to increased gut bacterial conversion of CA to DCA. Determining which bacteria can carry out 7-ɑ-dehydroxylation is critical to targeting gut bacterial bile acid metabolism. This study demonstrates that RS supplementation upregulates DCA production, identifying RS supplementation as a tool with which to define the dynamic regulation of 7-ɑ-dehydroxylation by gut bacteria. Disclosure M. Reuter: None. M. Tucker: None. Z. Marfori: None. R. Shishani: None. J. M. Bustamante: None. R. Moreno: None. B. Cummings: None.

Effects of Consuming Heat-Treated Dodamssal Brown Rice Containing Resistant Starch on Glucose Metabolism in Humans.

Rice is a major source of carbohydrates. Resistant starch (RS) is digested in the human small intestine but fermented in the large intestine. This study investigated the effect of consuming heat-treated and powdered brown rice cultivars 'Dodamssal' (HBD) and 'Ilmi' (HBI), with relatively high and less than 1% RS content, respectively, on the regulation of glucose metabolism in humans. Clinical trial meals were prepared by adding ~80% HBI or HBD powder to HBI and HBD meals, respectively. There was no statistical difference for protein, dietary fiber, and carbohydrate content, but the median particle diameter was significantly lower in HBI meals than in HBD meals. The RS content of HBD meals was 11.4 ± 0.1%, and the HBD meals also exhibited a low expected glycemic index. In a human clinical trial enrolling 36 obese participants, the homeostasis model assessment for insulin resistance decreased by 0.05 ± 0.14% and 1.5 ± 1.40% after 2 weeks (p = 0.021) in participants in the HBI and HBD groups, respectively. The advanced glycation end-product increased by 0.14 ± 0.18% in the HBI group and decreased by 0.06 ± 0.14% in the HBD group (p = 0.003). In conclusion, RS supplementation for 2 weeks appears to have a beneficial effect on glycemic control in obese participants.

Resistant starch supplementation alters the gut microbial consortium and attenuates kidney inflammation in an experimental model of autoimmune vasculitis

Abstract Anti-neutrophil cytoplasmic antibody (ANCA) associated vasculitis (AAV) is a rare autoimmune disease with suboptimal treatment options which contribute to morbidity and mortality. The characteristic pathological feature is severe inflammation induced by neutrophils which causes life threatening damage to the small blood vessels of the kidney. Neutrophil activity is influenced by microbial metabolites, including short chain fatty acids (SCFAs), produced from fermentation of non-digestible carbohydrates by gut microbiota. We utilised a well-established mouse model of AAV. Mice were randomised to receive either a control diet or a diet supplemented with 15% resistant starch (RS) (n=8 per group). At day 20, mice were culled and kidneys removed to assess injury. Glomerular neutrophil and macrophage infiltration were assessed by immunohistochemistry. Cecal contents were collected, DNA extracted and the V1-V2 hypervariable region amplified using 27F and 338R universal primers to assess the gut microbiota. The resistant starch intervention significantly reduced segmental necrosis in glomeruli (77.63 ± 7.2 % vs 25.59± 4.5 p/gcs, p &amp;lt; 0.0001) and reduced neutrophil (1.3 ± 0.37per glomerular cross section (p/gcs) vs 0.4 ± 0.3p/gcs, p &amp;lt; 0.0001) and macrophage (1.6± 0.3 p/gcs vs 0.4 ± 0.08 p/gcs, p &amp;lt; 0.0001) infiltration into glomeruli. The resistant starch diet significantly altered the gut microbiota consortium and was associated with a substantial expansion of Bacteroidaceae and Muribaculaceae both SCFA producing bacteria. This is the first report of the therapeutic efficacy of a resistant starch supplemented diet in experimental AAV. This data represents a promising therapeutic avenue to limit autoimmune kidney injury in AAV.

Gut Prevotellaceae-GABAergic septohippocampal pathway mediates spatial memory impairment in high-fat diet-fed ovariectomized mice

Clarifying the risk factors and mechanisms that contribute to the onset of cognitive impairment following estrogen depletion is essential for improving the quality of life of older females. In the current study, using behavioral tests, 16S rDNA sequencing, in vivo and in vitro electrophysiology, optogenetics and chemogenetics, we found that high-fat diet (HFD)-accelerated impairment of hippocampus-dependent memory, gut microbiota, and hippocampal theta rhythmogenesis in ovariectomized (OVX) mice and fecal microbiota transplantation rescued these phenomena. The identification of fasting-activated medial septal neurons showed that PV+ GABAergic neurons in the medial septal area (MSA) respond to gut sensory signals. Optogenetic activation of septohippocampal PV+ GABAergic fibers (but not cholinergic fibers) significantly rescued hippocampal theta rhythmogenesis and spatial memory in HFD-fed OVX mice. Resistant starch supplementation (RSHFD) rectified the gut Prevotellaceae and considerably alleviated reduced septal gut-responsive neurons, decreased hippocampal theta rhythm, and impaired hippocampus-dependent memory in HFD-fed OVX mice. Furthermore, chemogenetic inhibition of septal PV+ GABAergic neurons reversed the neuroprotective effects of resistant starch supplementation. These findings highlight the notable gut-sensory nature of medial septal PV+ GABAergic neurons. A HFD accelerates estrogen deficiency-induced cognitive impairment by disrupting the gut Prevotellaceae-septo-hippocampal pathway. This study contributes to a better understanding of the precise gut-brain control of cognition and cognitive impairment in postmenopausal females.

Effects of Chromium, Inositol and Resistant Starch Supplementation In Pcos

Polycystic ovary syndrome (PCOS) is a diverse condition that has distinct signs and symptoms such as hyperandrogenism and chronic anovulation. It is a major hormonal disorder that affects the health-related quality of life and mental health of young women. The etiology of PCOS still remains uncertain but insulin resistance is one of the major factors seen in PCOS individuals which are characterized by the presence of acanthosis nigricans. Dietary interventions and lifestyle modification are being considered to be a first-line treatment for women with PCOS. Proper diet, adequate nutritional status, and following a physical activity routine help in alleviating the symptoms of PCOS. Dietary interventions should focus on weight management and insulin regulation. An abnormal gut microbiome function results in ovarian dysfunction, immune changes, insulin resistance, and disruption in bile synthesis. Therefore, gut health of women suffering from PCOS should be prioritized and interventions that improve the gut health should be followed. This systematic review is performed to investigate the association between micronutrient supplementation and PCOS. The related articles were searched using the databases PubMed, Science Direct, and Google Scholar. All the studies involving micronutrient supplementation and PCOS were included in this systematic review. Micronutrient supplementation was significantly inversely associated with improving PCOS prognosis. The main finding of the systematic review is that it concludes there is a direct association between micronutrient supplementation as it helps in alleviating the symptoms and maintaining a proper lifestyle in women with PCOS.

Resistant starch supplementation limits kidney injury in an experimental model of anti-neutrophil cytoplasmic antibody associated vasculitis

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Dietary resistant starch ameliorating lipopolysaccharide-induced inflammation in meat ducks associated with the alteration in gut microbiome and glucagon-like peptide 1 signaling

BackgroundConsumption of resistant starch (RS) has been associated with various intestinal and systemic health benefits, but knowledge of its effects on intestinal health and inflammatory response in stressed birds is limited. Here, we examined how dietary RS supplementation from 12% raw potato starch (RPS) modulated inflammatory severity induced by lipopolysaccharide (LPS) in meat ducks.ResultsLPS administration at 14, 16, and 18 d (chronic challenge) decreased body weight (BW) and glucagon-like peptide 1 receptor (GLP-1R) level with higher intestinal permeability and inflammation, evident by higher pro-inflammatory cytokine levels. Dietary 12% RPS supplementation enhanced Claudin-1 and GLP-1R expression, along with lower levels of inflammatory factors in both ileum and serum. Microbiome analysis showed that RS treatment shifted microbial structure reflected by enriched the proportion of Firmicutes, Bifidobacterium, Ruminococcus, etc. Dietary RS addition also significantly increased the concentrations of propionate and butyrate during chronic LPS challenge. Furthermore, response to acute challenge, the ducks received 2 mg/kg BW LPS at 14 d had higher concentrations of serum endotoxins and inflammatory cytokines, as well as upregulated transcription of toll like receptor 4 (TLR4) in ileum when compared to control birds. Analogous to GLP-1 agonist liraglutide, dietary RS addition decreased endotoxins and inflammation cytokines, whereas it upregulated the GLP-1 synthesis related genes expression. Meanwhile, dietary RS supplementation suppressed the acute LPS challenge-induced TLR4 transcription.ConclusionsThese data suggest that dietary 12% RPS supplementation could attenuate the LPS-induced inflammation as well as intestinal injury of meat ducks, which might involve in the alteration in gut microbiota, SCFAs production and the signaling pathways of TLR4 and GLP-1/GLP-1R.