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Stojanović O, Miguel-Aliaga I, Trajkovski M. Intestinal plasticity and metabolism as regulators of organismal energy homeostasis. Nat Metab 2022; 4:1444-1458. [PMID: 36396854 DOI: 10.1038/s42255-022-00679-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 10/06/2022] [Indexed: 11/18/2022]
Abstract
The small intestine displays marked anatomical and functional plasticity that includes adaptive alterations in adult gut morphology, enteroendocrine cell profile and their hormone secretion, as well as nutrient utilization and storage. In this Perspective, we examine how shifts in dietary and environmental conditions bring about changes in gut size, and describe how the intestine adapts to changes in internal state, bowel resection and gastric bypass surgery. We highlight the critical importance of these intestinal remodelling processes in maintaining energy balance of the organism, and in protecting the metabolism of other organs. The intestinal resizing is supported by changes in the microbiota composition, and by activation of carbohydrate and fatty acid metabolism, which govern the intestinal stem cell proliferation, intestinal cell fate, as well as survivability of differentiated epithelial cells. The discovery that intestinal remodelling is part of the normal physiological adaptation to various triggers, and the potential for harnessing the reversible gut plasticity, in our view, holds extraordinary promise for developing therapeutic approaches against metabolic and inflammatory diseases.
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Affiliation(s)
- Ozren Stojanović
- Department of Cell Physiology and Metabolism, Centre Medical Universitaire (CMU), Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Diabetes Centre, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK
| | - Irene Miguel-Aliaga
- MRC London Institute of Medical Sciences, London, UK.
- Institute of Clinical Sciences, Faculty of Medicine, Imperial College London, London, UK.
| | - Mirko Trajkovski
- Department of Cell Physiology and Metabolism, Centre Medical Universitaire (CMU), Faculty of Medicine, University of Geneva, Geneva, Switzerland.
- Diabetes Centre, Faculty of Medicine, University of Geneva, Geneva, Switzerland.
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Dietary excess regulates absorption and surface of gut epithelium through intestinal PPARα. Nat Commun 2021; 12:7031. [PMID: 34857752 PMCID: PMC8639731 DOI: 10.1038/s41467-021-27133-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 11/05/2021] [Indexed: 02/08/2023] Open
Abstract
Intestinal surface changes in size and function, but what propels these alterations and what are their metabolic consequences is unknown. Here we report that the food amount is a positive determinant of the gut surface area contributing to an increased absorptive function, reversible by reducing daily food. While several upregulated intestinal energetic pathways are dispensable, the intestinal PPARα is instead necessary for the genetic and environment overeating-induced increase of the gut absorptive capacity. In presence of dietary lipids, intestinal PPARα knock-out or its pharmacological antagonism suppress intestinal crypt expansion and shorten villi in mice and in human intestinal biopsies, diminishing the postprandial triglyceride transport and nutrient uptake. Intestinal PPARα ablation limits systemic lipid absorption and restricts lipid droplet expansion and PLIN2 levels, critical for droplet formation. This improves the lipid metabolism, and reduces body adiposity and liver steatosis, suggesting an alternative target for treating obesity.
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Abstract
Palmitic acid (16:0) is a saturated fatty acid present in the diet and synthesized endogenously. Although often considered to have adverse effects on chronic disease in adults, 16:0 is an essential component of membrane, secretory, and transport lipids, with crucial roles in protein palmitoylation and signal molecules. At birth, the term infant is 13-15% body fat, with 45-50% 16:0, much of which is derived from endogenous synthesis in the fetus. After birth, the infant accumulates adipose tissue at high rates, reaching 25% body weight as fat by 4-5 months age. Over this time, human milk provides 10% dietary energy as 16:0, but in unusual triglycerides with 16:0 on the glycerol center carbon. This paper reviews the synthesis and oxidation of 16:0 and possible reasons why the infant is endowed with large amounts of fat and 16:0. The marked deviations in tissues with displacement of 16:0 that can occur in infants fed vegetable oil formulas is introduced. Assuming fetal fatty acid synthesis and the unusual delivery of 16:0 in human milk evolved to afford survival advantage to the neonate, it is timely to question if 16:0 is an essential component of tissue lipids whereby both deficiency and excess are detrimental.
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Affiliation(s)
- Sheila M Innis
- a Faculty of Medicine , Department of Paediatrics , Child and Family Research Institute, University of British Columbia , Vancouver , British Columbia , Canada
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Benoit B, Bruno J, Kayal F, Estienne M, Debard C, Ducroc R, Plaisancié P. Saturated and Unsaturated Fatty Acids Differently Modulate Colonic Goblet Cells In Vitro and in Rat Pups. J Nutr 2015; 145:1754-62. [PMID: 26108543 DOI: 10.3945/jn.115.211441] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 05/29/2015] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND High-fat diets induce intestinal barrier alterations and promote intestinal diseases. Little is known about the effects of long-chain fatty acids (LCFAs) on mucin 2 (MUC2) production by goblet cells, which are crucial for intestinal protection. OBJECTIVE We investigated the effects of LCFAs on the differentiation of colonic goblet cells, MUC2 expression, and colonic barrier function. METHODS Upon reaching confluence, human colonic mucus-secreting HT29-MTX cells were stimulated (21 d) with a saturated LCFA (palmitic or stearic acid), a monounsaturated LCFA (oleic acid), or a polyunsaturated LCFA (linoleic, γ-linolenic, α-linolenic, or eicosapentaenoic acid). In addition, rat pups underwent oral administration of oil (palm, rapeseed, or sunflower oil) or water (10 μL/g body weight, postnatal days 10-15). Subsequently, colon goblet cells were studied by Western blotting, reverse transcriptase-quantitative polymerase chain reaction, and immunohistochemistry and colonic transmucosal electrical resistance was measured by using Ussing chambers. RESULTS In vitro, palmitic acid enhanced MUC2 production (140% of control) and hepatocyte nuclear factor 4α expression, whereas oleic, linoleic, γ-linolenic, α-linolenic, and eicosapentaenoic acids reduced MUC2 expression (at least -50% of control). All unsaturated LCFAs decreased the expression of human atonal homolog 1, a transcription factor controlling goblet cell differentiation (at least -31% vs. control). In vivo, rats fed palm oil had higher palmitic acid concentrations (3-fold) in their colonic contents and increased mucus granule surfaces in their goblet cells (>2-fold) than did all other groups. Palm oil also increased colonic transmucosal electrical resistance (245% of control), yet had no effect on occludin and zonula occludens-1 expression. In contrast, sunflower and rapeseed oils decreased goblet cell number when compared with control (at least -10%) and palm oil (at least -14%) groups. CONCLUSIONS Palm oil in rat pups and palmitic acid in HT29-MTX cells increase the production of MUC2 and strengthen the intestinal barrier. In contrast, unsaturated LCFAs decrease MUC2 expression. These data should be taken into account in the context of preventive or therapeutic nutritional programs.
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Affiliation(s)
- Bérengère Benoit
- Lyon University, Villeurbanne, France; National Institute of Applied Sciences-Lyon, Pluridisciplinary Institute of Lipid Biochemistry, Villeurbanne, France
| | - Jérémie Bruno
- Lyon University, Villeurbanne, France; National Institute of Applied Sciences-Lyon, Pluridisciplinary Institute of Lipid Biochemistry, Villeurbanne, France
| | - Fanny Kayal
- Lyon University, Villeurbanne, France; National Institute of Applied Sciences-Lyon, Pluridisciplinary Institute of Lipid Biochemistry, Villeurbanne, France
| | - Monique Estienne
- National Institute of Applied Sciences-Lyon, Pluridisciplinary Institute of Lipid Biochemistry, Villeurbanne, France; National Institute of Agronomic Research, Research Unit 1397, French Institute of Health and Medical Research U1060, Cardiovascular, Metabolism, Diabetology and Nutrition Laboratory, Villeurbanne, France
| | - Cyrille Debard
- National Institute of Agronomic Research, Research Unit 1397, French Institute of Health and Medical Research U1060, Cardiovascular, Metabolism, Diabetology and Nutrition Laboratory, Villeurbanne, France; French Institute of Health and Medical Research U1060, Cardiovascular, Metabolism, Diabetology and Nutrition Laboratory, Oullins, France; and
| | - Robert Ducroc
- French Institute of Health and Medical Research U773, Bichat Beaujon Biomedical Research Centre, Paris, France
| | - Pascale Plaisancié
- National Institute of Applied Sciences-Lyon, Pluridisciplinary Institute of Lipid Biochemistry, Villeurbanne, France; National Institute of Agronomic Research, Research Unit 1397, French Institute of Health and Medical Research U1060, Cardiovascular, Metabolism, Diabetology and Nutrition Laboratory, Villeurbanne, France;
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Roy CC, Groleau V, Bouthillier L, Pineault M, Thibault M, Marchand V. Short bowel syndrome in infants: the critical role of luminal nutrients in a management program. Appl Physiol Nutr Metab 2014; 39:745-53. [DOI: 10.1139/apnm-2013-0211] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Short bowel syndrome develops when the remnant mass of functioning enterocytes following massive resections cannot support growth or maintain fluid–electrolyte balance and requires parenteral nutrition. Resection itself stimulates the intestine’s inherent ability to adapt morphologically and functionally. The capacity to change is very much related to the high turnover rate of enterocytes and is mediated by several signals; these signals are mediated in large part by enteral nutrition. Early initiation of enteral feeding, close clinical monitoring, and ongoing assessment of intestinal adaptation are key to the prevention of irreversible intestinal failure. The length of the functional small bowel remnant is the most important variable affecting outcome. The major objective of intestinal rehabilitation programs is to achieve early oral nutritional autonomy while maintaining normal growth and nutrition status and minimizing total parenteral nutrition related comorbidities such as chronic progressive liver disease. Remarkable progress has been made in terms of survivability and quality of life, especially in the context of coordinated multidisciplinary programs, but much work remains to be done.
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Affiliation(s)
- Claude C. Roy
- Département de Pédiatrie, Service de gastroentérologie, hépatologie et nutrition, CHU Sainte-Justine et Université de Montréal, 3175 chemin de la Côte Ste-Catherine, Montréal, QC H3T 1C5, Canada
| | - Véronique Groleau
- Département de Pédiatrie, Service de gastroentérologie, hépatologie et nutrition, CHU Sainte-Justine et Université de Montréal, 3175 chemin de la Côte Ste-Catherine, Montréal, QC H3T 1C5, Canada
| | - Lise Bouthillier
- Service de nutrition, CHU Sainte-Justine, Montréal, QC H3T 1C5, Canada
| | - Marjolain Pineault
- Département de pharmacie, CHU Sainte-Justine, Montréal, QC H3T 1C5, Canada
| | - Maxime Thibault
- Département de pharmacie, CHU Sainte-Justine, Montréal, QC H3T 1C5, Canada
| | - Valérie Marchand
- Département de Pédiatrie, Service de gastroentérologie, hépatologie et nutrition, CHU Sainte-Justine et Université de Montréal, 3175 chemin de la Côte Ste-Catherine, Montréal, QC H3T 1C5, Canada
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Abstract
Intestinal adaptation is a natural compensatory process that occurs following extensive intestinal resection, whereby structural and functional changes in the intestine improve nutrient and fluid absorption in the remnant bowel. In animal studies, postresection structural adaptations include bowel lengthening and thickening and increases in villus height and crypt depth. Functional changes include increased nutrient transporter expression, accelerated crypt cell differentiation, and slowed transit time. In adult humans, data regarding adaptive changes are sparse, and the mechanisms underlying intestinal adaptation remain to be fully elucidated. Several factors influence the degree of intestinal adaptation that occurs post resection, including site and extent of resection, luminal stimulation with enteral nutrients, and intestinotrophic factors. Two intestinotrophic growth factors, the glucagon-like peptide 2 analog teduglutide and recombinant growth hormone (somatropin), are now approved for clinical use in patients with short bowel syndrome (SBS). Both agents enhance fluid absorption and decrease requirements for parenteral nutrition (PN) and/or intravenous fluid. Intestinal adaptation has been thought to be limited to the first 1-2 years following resection in humans. However, recent data suggest that a significant proportion of adult patients with SBS can achieve enteral autonomy, even after many years of PN dependence, particularly with trophic stimulation.
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Affiliation(s)
- Kelly A Tappenden
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, Illinois
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Guo M, Li Y, Wang Z, Wu B, Wang J, Li J. Morphological Adaptation in Adult Short Bowel Syndrome Undergoing Intestinal Rehabilitation. J INVEST SURG 2013; 26:1-5. [DOI: 10.3109/08941939.2011.652728] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Sukhotnik I, Shany A, Bashenko Y, Hayari L, Chemodanov E, Mogilner J, Coran AG, Shaoul R. Parenteral but not enteral omega-3 fatty acids (Omegaven) modulate intestinal regrowth after massive small bowel resection in rats. JPEN J Parenter Enteral Nutr 2011; 34:503-12. [PMID: 20852178 DOI: 10.1177/0148607110362586] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND The purpose of the present study was to evaluate the effects of ω-3 fatty acids (Omegaven) on early intestinal adaptation in rats with short bowel syndrome (SBS). METHODS Male Sprague-Dawley rats were randomly assigned to 1 of 4 groups: sham rats underwent bowel transection; SBS rats underwent 75% bowel resection; SBS-O ω-3 rats underwent bowel resection and were treated with oral Omegaven given by gavage; and SBS-I ω-3 rats underwent bowel resection and were treated with Omegaven given intraperitoneally. Rats were killed on day 14. Parameters of intestinal adaptation (bowel and mucosal weight, mucosal DNA and protein, villus height and crypt depths, cell proliferation and apoptosis) were determined at time of death. Real-time polymerase chain reaction was used to determine the level of Bax and Bcl-2 messenger RNA (mRNA). Statistical analysis was performed using Kruskal-Wallis test followed by post hoc test, with P < .05 considered statistically significant. RESULTS Oral ω-3 supplementation did not significantly change intestinal regrowth. In contrast, parenteral ω-3 in rats that underwent resection resulted in higher bowel and mucosal weights, mucosal DNA and protein in ileum, villus height in ileum, crypt depth in jejunum and ileum, and greater rates of cell proliferation in jejunum and ileum compared with SBS animals. The initial decreased levels of apoptosis corresponded with the early decrease in Bax and increase in Bcl-2 mRNA levels. CONCLUSIONS Parenteral but not enteral Omegaven augments and accelerates structural bowel adaptation in a rat model of SBS. Increased cell proliferation and decreased apoptosis reflect increased cell turnover in Omegaven-treated animals.
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Affiliation(s)
- Igor Sukhotnik
- Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Laboratory of Intestinal Adaptation and Recovery, Bnai Zion Medical Center, Haifa, Israel.
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Obembe AO, Owu DU, Okwari OO, Antai AB, Osim EE. Intestinal Fluid and Glucose Transport in Wistar Rats following Chronic Consumption of Fresh or Oxidised Palm Oil Diet. ISRN GASTROENTEROLOGY 2010; 2011:972838. [PMID: 21991537 PMCID: PMC3168575 DOI: 10.5402/2011/972838] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Accepted: 10/12/2010] [Indexed: 11/23/2022]
Abstract
Chronic ingestion of thermoxidized palm oil causes functional derangement of various tissues. This study was therefore carried out to determine the effect of chronic ingestion of thermoxidized and fresh palm oil diets on intestinal fluid and glucose absorption in rats using the everted sac technique. Thirty Wistar rats were divided into three groups of 10 rats per group. The first group was the control and was fed on normal rat chow while the second (FPO) and third groups (TPO) were fed diet containing either fresh or thermoxidized palm oil (15% wt/wt) for 14 weeks. Villus height and crypt depth were measured. The gut fluid uptake and gut glucose uptake were significantly (P < .001) lower in the TPO group than those in the FPO and control groups, respectively. The villus height in the TPO was significantly (P < .01) lower than that in FPO and control. The villus depth in TPO was significantly (P < .05) higher than that in FPO and control groups, respectively. These results suggest that ingestion of thermoxidized palm oil and not fresh palm oil may lead to distortion in villus morphology with a concomitant malabsorption of fluid and glucose in rats due to its harmful free radicals.
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Affiliation(s)
- Agona O Obembe
- Department of Physiology, College of Medical Sciences, University of Calabar, 540001 Calabar, Nigeria
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