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Li S, Liu M, Cao S, Liu B, Li D, Wang Z, Sun H, Cui Y, Shi Y. The Mechanism of the Gut-Brain Axis in Regulating Food Intake. Nutrients 2023; 15:3728. [PMID: 37686760 PMCID: PMC10490484 DOI: 10.3390/nu15173728] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/16/2023] [Accepted: 08/23/2023] [Indexed: 09/10/2023] Open
Abstract
With the increasing prevalence of energy metabolism disorders such as diabetes, cardiovascular disease, obesity, and anorexia, the regulation of feeding has become the focus of global attention. The gastrointestinal tract is not only the site of food digestion and absorption but also contains a variety of appetite-regulating signals such as gut-brain peptides, short-chain fatty acids (SCFAs), bile acids (BAs), bacterial proteins, and cellular components produced by gut microbes. While the central nervous system (CNS), as the core of appetite regulation, can receive and integrate these appetite signals and send instructions to downstream effector organs to promote or inhibit the body's feeding behaviour. This review will focus on the gut-brain axis mechanism of feeding behaviour, discussing how the peripheral appetite signal is sensed by the CNS via the gut-brain axis and the role of the central "first order neural nuclei" in the process of appetite regulation. Here, elucidation of the gut-brain axis mechanism of feeding regulation may provide new strategies for future production practises and the treatment of diseases such as anorexia and obesity.
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Affiliation(s)
- Shouren Li
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.L.); (M.L.)
| | - Mengqi Liu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.L.); (M.L.)
| | - Shixi Cao
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.L.); (M.L.)
| | - Boshuai Liu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.L.); (M.L.)
- Henan Key Laboratory of Innovation and Utilization of Grassland Resources, Zhengzhou 450002, China
- Henan Forage Engineering Technology Research Center, Zhengzhou 450002, China
| | - Defeng Li
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.L.); (M.L.)
- Henan Key Laboratory of Innovation and Utilization of Grassland Resources, Zhengzhou 450002, China
- Henan Forage Engineering Technology Research Center, Zhengzhou 450002, China
| | - Zhichang Wang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.L.); (M.L.)
- Henan Key Laboratory of Innovation and Utilization of Grassland Resources, Zhengzhou 450002, China
- Henan Forage Engineering Technology Research Center, Zhengzhou 450002, China
| | - Hao Sun
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.L.); (M.L.)
- Henan Key Laboratory of Innovation and Utilization of Grassland Resources, Zhengzhou 450002, China
- Henan Forage Engineering Technology Research Center, Zhengzhou 450002, China
| | - Yalei Cui
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.L.); (M.L.)
- Henan Key Laboratory of Innovation and Utilization of Grassland Resources, Zhengzhou 450002, China
- Henan Forage Engineering Technology Research Center, Zhengzhou 450002, China
| | - Yinghua Shi
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China; (S.L.); (M.L.)
- Henan Key Laboratory of Innovation and Utilization of Grassland Resources, Zhengzhou 450002, China
- Henan Forage Engineering Technology Research Center, Zhengzhou 450002, China
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Pierre JF, Peters BM, La Torre D, Sidebottom AM, Tao Y, Zhu X, Cham CM, Wang L, Kambal A, Harris KG, Silva JF, Zaborina O, Alverdy JC, Herzog H, Witchley J, Noble SM, Leone VA, Chang EB. Peptide YY: A Paneth cell antimicrobial peptide that maintains Candida gut commensalism. Science 2023; 381:502-508. [PMID: 37535745 PMCID: PMC10876062 DOI: 10.1126/science.abq3178] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 06/02/2023] [Indexed: 08/05/2023]
Abstract
The mammalian gut secretes a family of multifunctional peptides that affect appetite, intestinal secretions, and motility whereas others regulate the microbiota. We have found that peptide YY (PYY1-36), but not endocrine PYY3-36, acts as an antimicrobial peptide (AMP) expressed by gut epithelial paneth cells (PC). PC-PYY is packaged into secretory granules and is secreted into and retained by surface mucus, which optimizes PC-PYY activity. Although PC-PYY shows some antibacterial activity, it displays selective antifungal activity against virulent Candida albicans hyphae-but not the yeast form. PC-PYY is a cationic molecule that interacts with the anionic surfaces of fungal hyphae to cause membrane disruption and transcriptional reprogramming that selects for the yeast phenotype. Hence, PC-PYY is an antifungal AMP that contributes to the maintenance of gut fungal commensalism.
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Affiliation(s)
- Joseph F Pierre
- Department of Medicine, University of Chicago, Chicago, IL, USA
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI, USA
| | - Brian M Peters
- Department of Clinical Pharmacy and Translational Science, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Diana La Torre
- Department of Medicine, University of Chicago, Chicago, IL, USA
| | | | - Yun Tao
- Department of Medicine, University of Chicago, Chicago, IL, USA
| | - Xiaorong Zhu
- Department of Medicine, University of Chicago, Chicago, IL, USA
| | - Candace M Cham
- Department of Medicine, University of Chicago, Chicago, IL, USA
| | - Ling Wang
- Department of Medicine, University of Chicago, Chicago, IL, USA
| | - Amal Kambal
- Department of Medicine, University of Chicago, Chicago, IL, USA
| | - Katharine G Harris
- Department of Medicine, University of Chicago, Chicago, IL, USA
- Department of Biology, Franklin College, Franklin, IN, USA
| | - Julian F Silva
- Department of Medicine, University of Chicago, Chicago, IL, USA
| | - Olga Zaborina
- Department of Surgery, University of Chicago, Chicago, IL, USA
| | - John C Alverdy
- Department of Surgery, University of Chicago, Chicago, IL, USA
| | | | - Jessica Witchley
- Department of Microbiology and Immunology, School of Medicine, University of California San Francisco, San Francisco, CA, USA
- Department of Molecular and Cell Biology, Immunology and Molecular Medicine Division, University of California-Berkeley, CA, USA
| | - Suzanne M Noble
- Department of Microbiology and Immunology, School of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Vanessa A Leone
- Department of Medicine, University of Chicago, Chicago, IL, USA
- Department of Animal & Dairy Sciences, University of Wisconsin-Madison, Madison, WI, USA
| | - Eugene B Chang
- Department of Medicine, University of Chicago, Chicago, IL, USA
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Yakabi S, Wang L, Karasawa H, Yuan PQ, Koike K, Yakabi K, Taché Y. VIP is involved in peripheral CRF-induced stimulation of propulsive colonic motor function and diarrhea in male rats. Am J Physiol Gastrointest Liver Physiol 2018; 314:G610-G622. [PMID: 29420068 PMCID: PMC6008061 DOI: 10.1152/ajpgi.00308.2017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 01/31/2018] [Accepted: 02/06/2018] [Indexed: 01/31/2023]
Abstract
We investigated whether vasoactive intestinal peptide (VIP) and/or prostaglandins contribute to peripheral corticotropin-releasing factor (CRF)-induced CRF1 receptor-mediated stimulation of colonic motor function and diarrhea in rats. The VIP antagonist, [4Cl-D-Phe6, Leu17]VIP injected intraperitoneally completely prevented CRF (10 µg/kg ip)-induced fecal output and diarrhea occurring within the first hour after injection, whereas pretreatment with the prostaglandins synthesis inhibitor, indomethacin, had no effect. In submucosal plexus neurons, CRF induced significant c-Fos expression most prominently in the terminal ileum compared with duodenum and jejunum, whereas no c-Fos was observed in the proximal colon. c-Fos expression in ileal submucosa was colocalized in 93.4% of VIP-positive neurons and 31.1% of non-VIP-labeled neurons. CRF1 receptor immunoreactivity was found on the VIP neurons. In myenteric neurons, CRF induced only a few c-Fos-positive neurons in the ileum and a robust expression in the proximal colon (17.5 ± 2.4 vs. 0.4 ± 0.3 cells/ganglion in vehicle). The VIP antagonist prevented intraperitoneal CRF-induced c-Fos induction in the ileal submucosal plexus and proximal colon myenteric plexus. At 60 min after injection, CRF decreased VIP levels in the terminal ileum compared with saline (0.8 ± 0.3 vs. 2.5 ± 0.7 ng/g), whereas VIP mRNA level detected by qPCR was not changed. These data indicate that intraperitoneal CRF activates intestinal submucosal VIP neurons most prominently in the ileum and myenteric neurons in the colon. It also implicates VIP signaling as part of underlying mechanisms driving the acute colonic secretomotor response to a peripheral injection of CRF, whereas prostaglandins do not play a role. NEW & NOTEWORTHY Corticotropin-releasing factor (CRF) in the gut plays a physiological role in the stimulation of lower gut secretomotor function induced by stress. We showed that vasoactive intestinal peptide (VIP)-immunoreactive neurons in the ileal submucosal plexus expressed CRF1 receptor and were prominently activated by CRF, unlike colonic submucosal neurons. VIP antagonist abrogated CRF-induced ileal submucosal and colonic myenteric activation along with functional responses (defecation and diarrhea). These data point to VIP signaling in ileum and colon as downstream effectors of CRF.
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Affiliation(s)
- Seiichi Yakabi
- CURE: Digestive Diseases Research Center, Vatche and Tamar Manoukian Digestive Diseases Division, David Geffen School of Medicine, University of California, Los Angeles, and Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo , Tokyo , Japan
| | - Lixin Wang
- CURE: Digestive Diseases Research Center, Vatche and Tamar Manoukian Digestive Diseases Division, David Geffen School of Medicine, University of California, Los Angeles, and Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California
| | - Hiroshi Karasawa
- CURE: Digestive Diseases Research Center, Vatche and Tamar Manoukian Digestive Diseases Division, David Geffen School of Medicine, University of California, Los Angeles, and Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California
| | - Pu-Qing Yuan
- CURE: Digestive Diseases Research Center, Vatche and Tamar Manoukian Digestive Diseases Division, David Geffen School of Medicine, University of California, Los Angeles, and Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California
| | - Kazuhiko Koike
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo , Tokyo , Japan
| | - Koji Yakabi
- Department of Gastroenterology and Hepatology, Saitama Medical Center, Saitama Medical University , Saitama , Japan
| | - Yvette Taché
- CURE: Digestive Diseases Research Center, Vatche and Tamar Manoukian Digestive Diseases Division, David Geffen School of Medicine, University of California, Los Angeles, and Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California
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Overduin J, Guérin-Deremaux L, Wils D, Lambers TT. NUTRALYS(®) pea protein: characterization of in vitro gastric digestion and in vivo gastrointestinal peptide responses relevant to satiety. Food Nutr Res 2015; 59:25622. [PMID: 25882536 PMCID: PMC4400298 DOI: 10.3402/fnr.v59.25622] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 02/05/2015] [Accepted: 02/26/2015] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Pea protein (from Pisum sativum) is under consideration as a sustainable, satiety-inducing food ingredient. OBJECTIVE In the current study, pea-protein-induced physiological signals relevant to satiety were characterized in vitro via gastric digestion kinetics and in vivo by monitoring post-meal gastrointestinal hormonal responses in rats. DESIGN Under in vitro simulated gastric conditions, the digestion of NUTRALYS(®) pea protein was compared to that of two dairy proteins, slow-digestible casein and fast-digestible whey. In vivo, blood glucose and gastrointestinal hormonal (insulin, ghrelin, cholecystokinin [CCK], glucagon-like peptide 1 [GLP-1], and peptide YY [PYY]) responses were monitored in nine male Wistar rats following isocaloric (11 kcal) meals containing 35 energy% of either NUTRALYS(®) pea protein, whey protein, or carbohydrate (non-protein). RESULTS In vitro, pea protein transiently aggregated into particles, whereas casein formed a more enduring protein network and whey protein remained dissolved. Pea-protein particle size ranged from 50 to 500 µm, well below the 2 mm threshold for gastric retention in humans. In vivo, pea-protein and whey-protein meals induced comparable responses for CCK, GLP-1, and PYY, that is, the anorexigenic hormones. Pea protein induced weaker initial, but equal 3-h integrated ghrelin and insulin responses than whey protein, possibly due to the slower gastric breakdown of pea protein observed in vitro. Two hours after meals, CCK levels were more elevated in the case of protein meals compared to that of non-protein meals. CONCLUSIONS These results indicate that 1) pea protein transiently aggregates in the stomach and has an intermediately fast intestinal bioavailability in between that of whey and casein; 2) pea-protein- and dairy-protein-containing meals were comparably efficacious in triggering gastrointestinal satiety signals.
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Affiliation(s)
- Joost Overduin
- Department of Health, NIZO Food Research, Ede, The Netherlands;
| | | | - Daniel Wils
- Nutrition Management, Roquette Frères, Lestrem, France
| | - Tim T Lambers
- Department of Health, NIZO Food Research, Ede, The Netherlands
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Dietary galacto-oligosaccharides and calcium: effects on energy intake, fat-pad weight and satiety-related, gastrointestinal hormones in rats. Br J Nutr 2012; 109:1338-48. [PMID: 22850280 DOI: 10.1017/s0007114512003066] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Galacto-oligosaccharides (GOS) are carbohydrates that are fermented by colonic microbiota. The present study examined effects of a 3-week dietary enrichment with 6 % (w/w) GOS on parameters of energy balance in forty-three male Wistar rats. GOS was tested with two doses of calcium phosphate (30 and 100 mmol/kg), known to differently affect colonic fermentation. After 17 d, isoenergetic test meals were presented and plasma responses of ghrelin, glucagon-like peptide-1 (GLP-1) and peptide YY (PYY) were measured. On day 21 (study termination) epididymal fat pads and caecum were weighed. Additionally, gastrointestinal mucosal samples and proximal colonic contents were analysed for gene expression (ghrelin, proglucagon and PYY) and fermentation metabolites (SCFA and lactate), respectively. GOS reduced energy intake most prominently during the first week, without provoking compensatory overeating later on (average intake reduction: 14 %). The GOS-fed rats showed increased caecal and reduced fat-pad weight and increased gene expression of the satiety-related peptides, PYY (1.7-fold) and proglucagon (3.5-fold). Pre-meal baseline and post-meal plasma levels of PYY, but not of ghrelin or GLP-1, were higher in GOS-fed rats than in control rats. Ca enrichment resulted in higher energy intake (average 4.5 %). GOS diets increased lactic acid levels and slightly reduced butyric acid in proximal colonic contents. Ca abolished the GOS-related elevation of lactic acid, while increasing propionic acid levels, but did not inhibit GOS-related effects on energy intake, fat-pad weight or gene expression. These results indicate that dietary GOS stimulate a number of physiological mechanisms that can reduce energy intake, regardless of the calcium phosphate content of the diet.
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Reidelberger R, Haver A, Chelikani P, Keire DA, Reeve JR. Effects of glycine-extended and serine13-phosphorylated forms of peptide YY on food intake in rats. Peptides 2011; 32:770-5. [PMID: 21262301 PMCID: PMC3060995 DOI: 10.1016/j.peptides.2011.01.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Revised: 12/26/2010] [Accepted: 01/02/2011] [Indexed: 12/21/2022]
Abstract
The gut hormone peptide YY(3-36)-amide [PYY(3-36)-NH(2)] is significantly more potent than PYY(1-36)-NH(2) in reducing food intake in rats and humans. Other Gly-extended and Ser(13)-phosphorylated PYY forms have been detected or predicted based upon known cellular processes of PYY synthesis and modification. Here we compared the effects of 3-h IV infusion of PYY(1-36)-NH(2), PYY(3-36)-NH(2), PYY(1-36)-Gly-OH, PYY(3-36)-Gly-OH, Ser(13)(PO(3))-PYY(1-36)-NH(2), Ser(13)(PO(3))-PYY(3-36)-NH(2), Ser(13)(PO(3))-PYY(1-36)-Gly-OH, and Ser(13)(PO(3))-PYY(3-36)-Gly-OH during the early dark period on food intake in freely feeding rats. PYY(3-36)-NH(2) and Ser(13)(PO(3))-PYY(3-36)-NH(2) reduced food intake similarly at 50 pmol/kg/min, while only PYY(3-36)-NH(2) reduced food intake at 15 pmol/kg/min. PYY(1-36)-NH(2) and Ser(13)(PO(3))-PYY(1-36)-NH(2) reduced food intake similarly at 50 and 150 pmol/kg/min. In contrast, PYY(1-36)-Gly-OH, PYY(3-36)-Gly-OH, Ser(13)(PO(3))-PYY(3-36)-Gly-OH, and Ser(13)(PO(3))-PYY(1-36)-Gly-OH had no effect on food intake at doses of 50 or 150 pmol/kg/min. Taken together, these results indicate that (i) PYY(3-36)-NH(2) is significantly more potent than PYY(1-36)-NH(2) in reducing food intake, (ii) Gly-extended forms of PYY are significantly less potent than non-extended forms, and (iii) Ser(13)-phosphorylation of PYY(3-36)-NH(2) decreases the anorexigenic potency PYY(3-36)-NH(2), but not PYY(1-36)-NH(2). Thus, PYY(3-36)-NH(2) appears to be the most potent PYY form for reducing food intake in rats.
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Affiliation(s)
- Roger Reidelberger
- Department of Veterans Affairs, Nebraska Western Iowa Health Care System, Omaha, NE 68105, USA.
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Moran TH, Dailey MJ. Intestinal feedback signaling and satiety. Physiol Behav 2011; 105:77-81. [PMID: 21315751 DOI: 10.1016/j.physbeh.2011.02.005] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2010] [Revised: 01/28/2011] [Accepted: 02/01/2011] [Indexed: 01/18/2023]
Abstract
Peptidergic and neural signals arising from the presence of food in the gastrointestinal track provide feedback signals to the brain about the nature and quantity of consumed nutrients. Peptide secreting cells are differentially distributed along the gastrointestinal tract. How ingested nutrients activate or inhibit peptide secretion is complex and depends upon local, hormonal and neural mechanisms. The mode of action of the various peptides is equally complex involving endocrine, paracrine and neurocrine signaling. The success of bariatric surgical approaches to obesity treatment is secondary to alterations in gastrointestinal feedback signaling and roles of increased secretion of lower gut peptides such as peptide YY (PYY) and glucagon like peptide 1 (GLP-1) in mediating the superior effects of Roux-en-Y gastric bypass (RYGB) surgery are becoming evident. Direct nutrient delivery to jejunal sites that models the site of gastric-jejunal anastamosis in RYGB is especially effective at inhibiting food intake. Such infusions also stimulate the release of lower gut peptides suggesting a role for increased gut peptide signaling in sustaining such feeding inhibitions. Thus, gut peptides are clear targets for future obesity therapeutic developments.
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Affiliation(s)
- Timothy H Moran
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Ross 618, 720 Rutland Ave., Baltimore, MD 21205, United States.
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