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Pérez-Rodríguez L, Martínez-Blanco M, Lozano-Ojalvo D, Fontecha J, Molina E, Benedé S, López-Fandiño R. Triacylglycerides and Phospholipids from Egg Yolk Differently Influence the Immunostimulating Properties of Egg White Proteins. Nutrients 2021; 13:3301. [PMID: 34684302 PMCID: PMC8539141 DOI: 10.3390/nu13103301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/09/2021] [Accepted: 09/17/2021] [Indexed: 11/17/2022] Open
Abstract
As part of a whole egg, egg white proteins are embedded in a lipid matrix that could modify their presentation to the immune system and their allergenic properties. The present study examines the impact of the main egg lipid components, triacylglycerides and phospholipids, in the early events of sensitization to egg. To this end, BALB/c mice were exposed intragastrically to egg lipids and egg lipid fractions, alone and in mixtures with egg white proteins, and Th2-promoting and proinflammatory effects were investigated. Our results highlight that the egg lipid fraction is responsible for Th2 adjuvant effects and point at a different influence of triacylglycerides and phospholipids on the bioavailability and immunomodulating properties of egg white proteins. While triacylglycerides promote type 2 responses at the small intestine level, phospholipids reduce the solubility of EW proteins and induce Th2 skewing in lymphoid intestinal tissues, which may have a direct impact on the development of egg allergy.
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Affiliation(s)
- Leticia Pérez-Rodríguez
- Instituto de Investigación en Ciencias de la Alimentación (CIAL, CSIC-UAM), Nicolás Cabrera 9, 28049 Madrid, Spain; (L.P.-R.); (M.M.-B.); (J.F.); (E.M.); (S.B.)
| | - Mónica Martínez-Blanco
- Instituto de Investigación en Ciencias de la Alimentación (CIAL, CSIC-UAM), Nicolás Cabrera 9, 28049 Madrid, Spain; (L.P.-R.); (M.M.-B.); (J.F.); (E.M.); (S.B.)
| | - Daniel Lozano-Ojalvo
- Icahn School of Medicine at Mount Sinai, 1425 Madison Ave, 11-26, New York, NY 10029, USA;
| | - Javier Fontecha
- Instituto de Investigación en Ciencias de la Alimentación (CIAL, CSIC-UAM), Nicolás Cabrera 9, 28049 Madrid, Spain; (L.P.-R.); (M.M.-B.); (J.F.); (E.M.); (S.B.)
| | - Elena Molina
- Instituto de Investigación en Ciencias de la Alimentación (CIAL, CSIC-UAM), Nicolás Cabrera 9, 28049 Madrid, Spain; (L.P.-R.); (M.M.-B.); (J.F.); (E.M.); (S.B.)
| | - Sara Benedé
- Instituto de Investigación en Ciencias de la Alimentación (CIAL, CSIC-UAM), Nicolás Cabrera 9, 28049 Madrid, Spain; (L.P.-R.); (M.M.-B.); (J.F.); (E.M.); (S.B.)
| | - Rosina López-Fandiño
- Instituto de Investigación en Ciencias de la Alimentación (CIAL, CSIC-UAM), Nicolás Cabrera 9, 28049 Madrid, Spain; (L.P.-R.); (M.M.-B.); (J.F.); (E.M.); (S.B.)
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Mazgaj R, Lipiński P, Szudzik M, Jończy A, Kopeć Z, Stankiewicz AM, Kamyczek M, Swinkels D, Żelazowska B, Starzyński RR. Comparative Evaluation of Sucrosomial Iron and Iron Oxide Nanoparticles as Oral Supplements in Iron Deficiency Anemia in Piglets. Int J Mol Sci 2021; 22:9930. [PMID: 34576090 PMCID: PMC8466487 DOI: 10.3390/ijms22189930] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/06/2021] [Accepted: 09/11/2021] [Indexed: 12/15/2022] Open
Abstract
Iron deficiency is the most common mammalian nutritional disorder. However, among mammalian species iron deficiency anemia (IDA), occurs regularly only in pigs. To cure IDA, piglets are routinely injected with high amounts of iron dextran (FeDex), which can lead to perturbations in iron homeostasis. Here, we evaluate the therapeutic efficacy of non-invasive supplementation with Sucrosomial iron (SI), a highly bioavailable iron supplement preventing IDA in humans and mice and various iron oxide nanoparticles (IONPs). Analysis of red blood cell indices and plasma iron parameters shows that not all iron preparations used in the study efficiently counteracted IDA comparable to FeDex-based supplementation. We found no signs of iron toxicity of any tested iron compounds, as evaluated based on the measurement of several toxicological markers that could indicate the occurrence of oxidative stress or inflammation. Neither SI nor IONPs increased hepcidin expression with alterations in ferroportin (FPN) protein level. Finally, the analysis of the piglet gut microbiota indicates the individual pattern of bacterial diversity across taxonomic levels, independent of the type of supplementation. In light of our results, SI but not IONPs used in the experiment emerges as a promising nutritional iron supplement, with a high potential to correct IDA in piglets.
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Affiliation(s)
- Rafał Mazgaj
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology PAS, 28-130 Jastrzębiec, Poland; (R.M.); (M.S.); (A.J.); (Z.K.); (A.M.S.); (B.Ż.)
| | - Paweł Lipiński
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology PAS, 28-130 Jastrzębiec, Poland; (R.M.); (M.S.); (A.J.); (Z.K.); (A.M.S.); (B.Ż.)
| | - Mateusz Szudzik
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology PAS, 28-130 Jastrzębiec, Poland; (R.M.); (M.S.); (A.J.); (Z.K.); (A.M.S.); (B.Ż.)
| | - Aneta Jończy
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology PAS, 28-130 Jastrzębiec, Poland; (R.M.); (M.S.); (A.J.); (Z.K.); (A.M.S.); (B.Ż.)
| | - Zuzanna Kopeć
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology PAS, 28-130 Jastrzębiec, Poland; (R.M.); (M.S.); (A.J.); (Z.K.); (A.M.S.); (B.Ż.)
| | - Adrian M. Stankiewicz
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology PAS, 28-130 Jastrzębiec, Poland; (R.M.); (M.S.); (A.J.); (Z.K.); (A.M.S.); (B.Ż.)
| | - Marian Kamyczek
- Pig Hybridization Centre, National Research Institute of Animal Production, 43-246 Pawłowice, Poland;
| | - Dorine Swinkels
- Department of Laboratory Medicine (TLM 830), Radboud University Nijmegen Medical Center, 6525 GA Nijmegen, The Netherlands;
- Hepcidin Analysis, Department of Laboratory Medicine, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Beata Żelazowska
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology PAS, 28-130 Jastrzębiec, Poland; (R.M.); (M.S.); (A.J.); (Z.K.); (A.M.S.); (B.Ż.)
| | - Rafał R. Starzyński
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology PAS, 28-130 Jastrzębiec, Poland; (R.M.); (M.S.); (A.J.); (Z.K.); (A.M.S.); (B.Ż.)
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Sweed N, Kim HJ, Hultenby K, Barros R, Parini P, Sancisi V, Strandvik B, Gabbi C. Liver X receptor β regulates bile volume and the expression of aquaporins and cystic fibrosis transmembrane conductance regulator in the gallbladder. Am J Physiol Gastrointest Liver Physiol 2021; 321:G243-G251. [PMID: 34259574 PMCID: PMC8815792 DOI: 10.1152/ajpgi.00024.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 07/02/2021] [Accepted: 07/12/2021] [Indexed: 01/31/2023]
Abstract
The gallbladder is considered an important organ in maintaining digestive and metabolic homeostasis. Given that therapeutic options for gallbladder diseases are often limited to cholecystectomy, understanding gallbladder pathophysiology is essential in developing novel therapeutic strategies. Since liver X receptor β (LXRβ), an oxysterol-activated transcription factor, is strongly expressed in gallbladder cholangiocytes, the aim was to investigate LXRβ physiological function in the gallbladder. Thus, we studied the gallbladders of WT and LXRβ-/- male mice using immunohistochemistry, electron microscopy, qRT-PCR, bile duct cannulation, bile and blood biochemistry, and duodenal pH measurements. LXRβ-/- mice presented a large gallbladder bile volume with high duodenal mRNA levels of the vasoactive intestinal polypeptide (VIP), a strong mediator of gallbladder relaxation. LXRβ-/- gallbladders showed low mRNA and protein expression of Aquaporin-1, Aquaporin-8, and cystic fibrosis transmembrane conductance regulator (CFTR). A cystic fibrosis-resembling phenotype was evident in the liver showing high serum cholestatic markers and the presence of reactive cholangiocytes. For LXRβ being a transcription factor, we identified eight putative binding sites of LXR on the promoter and enhancer of the Cftr gene, suggesting Cftr as a novel LXRβ regulated gene. In conclusion, LXRβ was recognized as a regulator of gallbladder bile volume through multiple mechanisms involving CFTR and aquaporins.NEW & NOTEWORTHY This report reveals a novel and specific role of the nuclear receptor liver X receptor β (LXRβ) in controlling biliary tree pathophysiology. LXRβ-/- mice have high gallbladder bile volume and are affected by a cholangiopathy that resembles cystic fibrosis. We found LXRβ to regulate the expression of both aquaporins water channels and the cystic fibrosis transmembrane conductance regulator. This opens a new field in biliary tree pathophysiology, enlightening a possible transcription factor controlling CFTR expression.
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Affiliation(s)
- Nathan Sweed
- Center for Nuclear Receptors and Cell Signaling, University of Houston, Houston, Texas
| | - Hyun-Jin Kim
- Center for Nuclear Receptors and Cell Signaling, University of Houston, Houston, Texas
| | - Kjell Hultenby
- Department of Laboratory Medicine, Karolinska Institutet, NEO, Stockholm, Sweden
| | - Rodrigo Barros
- Center for Nuclear Receptors and Cell Signaling, University of Houston, Houston, Texas
| | - Paoo Parini
- Division of Clinical Chemistry, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Valentina Sancisi
- Laboratory of Translational Research, Azienda USL Reggio Emilia-IRCCS, Reggio Emilia, Italy
| | - Birgitta Strandvik
- Department of Biosciences and Nutrition, Karolinska Institutet, NEO, Stockholm, Sweden
| | - Chiara Gabbi
- Center for Nuclear Receptors and Cell Signaling, University of Houston, Houston, Texas
- Department of Biosciences and Nutrition, Karolinska Institutet, NEO, Stockholm, Sweden
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Jatko JT, Darling CL, Kellett MP, Bain LJ. Arsenic exposure in drinking water reduces Lgr5 and secretory cell marker gene expression in mouse intestines. Toxicol Appl Pharmacol 2021; 422:115561. [PMID: 33957193 DOI: 10.1016/j.taap.2021.115561] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 02/28/2021] [Accepted: 04/30/2021] [Indexed: 12/12/2022]
Abstract
Arsenic is a global health concern that causes toxicity through ingestion of contaminated water and food. In vitro studies suggest that arsenic reduces stem and progenitor cell differentiation. Thus, this study determined if arsenic disrupted intestinal stem cell (ISC) differentiation, thereby altering the number, location, and/or function of intestinal epithelial cells. Adult male C57BL/6 mice were exposed to 0 or 100 ppb sodium arsenite (AsIII) through drinking water for 5 weeks. Duodenal sections were collected to assess changes in morphology, proliferation, and cell types. qPCR analysis revealed a 40% reduction in Lgr5 transcripts, an ISC marker, in the arsenic-exposed mice, although there were no changes in the protein expression of Olfm4. Secretory cell-specific transcript markers of Paneth (Defa1), Goblet (Tff3), and secretory transit amplifying (Math1) cells were reduced by 51%, 44%, and 30% respectively, in the arsenic-exposed mice, indicating significant impacts on the Wnt-dependent differentiation pathway. Further, protein levels of phosphorylated β-catenin were reduced in the arsenic-exposed mice, which increased the expression of Wnt-dependent transcripts CD44 and c-myc. PCA analysis, followed by MANOVA and regression analyses, revealed significant changes and correlations between Lgr5 and the transit amplifying (TA) cell markers Math1 and Hes1, which are in the secretory cell pathway. Similar comparisons between Math1 and Defa1 show that terminal differentiation into Paneth cells is also reduced in the arsenic-exposed mice. The data suggests that ISCs are not lost following arsenic exposure, but rather, specific Wnt-dependent progenitor cell formation and terminal differentiation in the small intestine is reduced.
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Affiliation(s)
- Jordan T Jatko
- Environmental Toxicology Graduate Program, Clemson University, 132 Long Hall, Clemson, SC 29634, USA
| | - Caitlin L Darling
- Department of Biological Sciences, Clemson University, 132 Long Hall, Clemson, SC 29634, USA
| | - Michael P Kellett
- Department of Biological Sciences, Clemson University, 132 Long Hall, Clemson, SC 29634, USA
| | - Lisa J Bain
- Environmental Toxicology Graduate Program, Clemson University, 132 Long Hall, Clemson, SC 29634, USA; Department of Biological Sciences, Clemson University, 132 Long Hall, Clemson, SC 29634, USA.
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Ivashkin V, Poluektov Y, Kogan E, Shifrin O, Sheptulin A, Kovaleva A, Kurbatova A, Krasnov G, Poluektova E. Disruption of the pro-inflammatory, anti-inflammatory cytokines and tight junction proteins expression, associated with changes of the composition of the gut microbiota in patients with irritable bowel syndrome. PLoS One 2021; 16:e0252930. [PMID: 34115808 PMCID: PMC8195381 DOI: 10.1371/journal.pone.0252930] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 05/25/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Irritable bowel syndrome (IBS) is a pathologic condition characterized by changes in gut microbiome composition, low-grade inflammation, and disruption of intestinal wall permeability. The interaction between the gut microbiome and the disease manifestation remains unclear. The changing of tight junction proteins and cytokines expression throughout the gastrointestinal tract in IBS patients has not been studied yet. AIM OF THE STUDY To assess the changes of gut microbiome composition, tight junction proteins, and cytokines expression of intestinal mucosa from the duodenum to the distal part of the colon in IBS patients and healthy volunteers. METHODS In 31 IBS patients (16 patients with IBS-D; 15 patients with IBS-C) and 10 healthy volunteers the expression of CLD-2, CLD-3, CLD-5, IL-2, IL-10, and TNF-α in mucosal biopsy specimens was determined by morphological and immune-histochemical methods. The qualitative and quantitative composition of the intestinal microbiota was assessed based on 16S rRNA gene sequencing in both groups of patients. RESULTS The expression of IL-2 and TNF-α was significantly increased in IBS patients compared with the controls (p<0.001), with a gradual increase from the duodenum to the sigmoid colon. The expression of IL-10, CLD-3, and CLD-5 in mucosal biopsy specimens of these patients was lower than in the control group (p<0.001). Increased ratios of Bacteroidetes and decreased ratios of Firmicutes were noted in IBS patients compared to healthy volunteers (p<0.05). CONCLUSION IBS patients have impaired gut permeability and persisting low-grade inflammation throughout the gastrointestinal tract. Changes in the gut microbiota may support or exacerbate these changes.
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Affiliation(s)
- V. Ivashkin
- I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation
| | - Y. Poluektov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - E. Kogan
- I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation
| | - O. Shifrin
- I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation
| | - A. Sheptulin
- I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation
| | - A. Kovaleva
- I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation
| | - A. Kurbatova
- I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation
| | - G. Krasnov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - E. Poluektova
- I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation
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Yokota J, Yamashita T, Inui T, Nomoto R, Kishimoto W, Nakase H, Mizuguchi H. Comparison of culture media for human intestinal organoids from the viewpoint of pharmacokinetic studies. Biochem Biophys Res Commun 2021; 566:115-122. [PMID: 34119823 DOI: 10.1016/j.bbrc.2021.06.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 06/01/2021] [Indexed: 12/11/2022]
Abstract
Human intestinal organoids are expected to be applied in pharmaceutical research. Various culture media for human intestinal organoids have been developed, but it remains unclear which media are preferable for pharmacokinetic studies. Here, we cultured human intestinal organoids with three major culture media that are already used widely around the world: the medium of Sato et al. (S-medium; reported in 2011), Fujii et al. (F-medium; 2018), and Miyoshi et al. (M-medium; 2013). The growth of human intestinal organoids cultured in S-medium was faster than that in F- or M-medium. The gene expression levels of most pharmacokinetic-related enzymes or transporters in human intestinal organoids cultured in M-medium were higher than those in S- or F-medium, and comparable to those in the adult human small intestine. The level of cytochrome P450 (CYP) 3A4 activity was also highest in human intestinal organoids cultured in M-medium. Collectively, the results underscored the importance of selection and optimization of culture medium for various applications using human intestinal organoids, including pharmacokinetic studies.
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Affiliation(s)
- Jumpei Yokota
- Laboratory of Biochemistry and Molecular Biology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan.
| | - Tomoki Yamashita
- Laboratory of Biochemistry and Molecular Biology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan; Integrated Frontier Research for Medical Science Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Suita, Osaka, 565-0871, Japan.
| | - Tatsuya Inui
- Laboratory of Biochemistry and Molecular Biology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan.
| | - Ryuga Nomoto
- Laboratory of Biochemistry and Molecular Biology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan.
| | - Wataru Kishimoto
- Department of Pharmacokinetics and Nonclinical Safety, Nippon Boehringer Ingelheim Co Ltd, Kobe, Hyogo, 650-0047, Japan.
| | - Hiroshi Nakase
- Department of Gastroenterology and Hepatology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, 060-8556, Japan.
| | - Hiroyuki Mizuguchi
- Laboratory of Biochemistry and Molecular Biology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan; Laboratory of Hepatocyte Regulation, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Osaka, 567-0085, Japan; Global Center for Medical Engineering and Informatics, Osaka University, Suita, Osaka, 565-0871, Japan; Integrated Frontier Research for Medical Science Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Suita, Osaka, 565-0871, Japan.
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Nahmias A, Stahel P, Tian L, Xiao C, Lewis GF. GLP-1 (Glucagon-Like Peptide-1) Is Physiologically Relevant for Chylomicron Secretion Beyond Its Known Pharmacological Role. Arterioscler Thromb Vasc Biol 2021; 41:1893-1900. [PMID: 33951941 DOI: 10.1161/atvbaha.121.316311] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Avital Nahmias
- Division of Endocrinology, Department of Medicine and Banting and Best Diabetes Centre, University of Toronto, Ontario, Canada (A.N., P.S., L.T., G.F.L.)
| | - Priska Stahel
- Division of Endocrinology, Department of Medicine and Banting and Best Diabetes Centre, University of Toronto, Ontario, Canada (A.N., P.S., L.T., G.F.L.)
| | - Lili Tian
- Division of Endocrinology, Department of Medicine and Banting and Best Diabetes Centre, University of Toronto, Ontario, Canada (A.N., P.S., L.T., G.F.L.)
| | - Changting Xiao
- Department of Anatomy, Physiology and Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, Canada (C.X.)
| | - Gary F Lewis
- Division of Endocrinology, Department of Medicine and Banting and Best Diabetes Centre, University of Toronto, Ontario, Canada (A.N., P.S., L.T., G.F.L.)
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Wang X, Zhang M, Woloshun RR, Yu Y, Lee JK, Flores SRL, Merlin D, Collins JF. Oral Administration of Ginger-Derived Lipid Nanoparticles and Dmt1 siRNA Potentiates the Effect of Dietary Iron Restriction and Mitigates Pre-Existing Iron Overload in Hamp KO Mice. Nutrients 2021; 13:1686. [PMID: 34063414 PMCID: PMC8157040 DOI: 10.3390/nu13051686] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 12/28/2022] Open
Abstract
Intestinal iron transport requires an iron importer (Dmt1) and an iron exporter (Fpn1). The hormone hepcidin regulates iron absorption by modulating Fpn1 protein levels on the basolateral surface of duodenal enterocytes. In the genetic, iron-loading disorder hereditary hemochromatosis (HH), hepcidin production is low and Fpn1 protein expression is elevated. High Fpn1-mediated iron export depletes intracellular iron, causing a paradoxical increase in Dmt1-mediated iron import. Increased activity of both transporters causes excessive iron absorption, thus initiating body iron loading. Logically then, silencing of intestinal Dmt1 or Fpn1 could be an effective therapeutic intervention in HH. It was previously established that Dmt1 knock down prevented iron-loading in weanling Hamp (encoding hepcidin) KO mice (modeling type 2B HH). Here, we tested the hypothesis that Dmt1 silencing combined with dietary iron restriction (which may be recommended for HH patients) will mitigate iron loading once already established. Accordingly, adult Hamp KO mice were switched to a low-iron (LFe) diet and (non-toxic) folic acid-coupled, ginger nanoparticle-derived lipid vectors (FA-GDLVs) were used to deliver negative-control (NC) or Dmt1 siRNA by oral, intragastric gavage daily for 21 days. The LFe diet reduced body iron burden, and experimental interventions potentiated iron losses. For example, Dmt1 siRNA treatment suppressed duodenal Dmt1 mRNA expression (by ~50%) and reduced serum and liver non-heme iron levels (by ~60% and >85%, respectively). Interestingly, some iron-related parameters were repressed similarly by FA-GDLVs carrying either siRNA, including 59Fe (as FeCl3) absorption (~20% lower), pancreatic non-heme iron (reduced by ~65%), and serum ferritin (decreased 40-50%). Ginger may thus contain bioactive lipids that also influence iron homeostasis. In conclusion, the combinatorial approach of FA-GDLV and Dmt1 siRNA treatment, with dietary iron restriction, mitigated pre-existing iron overload in a murine model of HH.
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Affiliation(s)
- Xiaoyu Wang
- Key Laboratory of Precision Nutrition and Food Quality, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China;
- Food Science & Human Nutrition Department, University of Florida, Gainesville, FL 32611, USA; (R.R.W.); (Y.Y.); (J.K.L.); (S.R.L.F.)
| | - Mingzhen Zhang
- Center for Diagnostics and Therapeutics, Institute for Biomedical Science, Georgia State University, Atlanta, GA 30303, USA; (M.Z.); (D.M.)
- School of Basic Medical Science, Health Science Center, Institute of Medical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
| | - Regina R. Woloshun
- Food Science & Human Nutrition Department, University of Florida, Gainesville, FL 32611, USA; (R.R.W.); (Y.Y.); (J.K.L.); (S.R.L.F.)
| | - Yang Yu
- Food Science & Human Nutrition Department, University of Florida, Gainesville, FL 32611, USA; (R.R.W.); (Y.Y.); (J.K.L.); (S.R.L.F.)
| | - Jennifer K. Lee
- Food Science & Human Nutrition Department, University of Florida, Gainesville, FL 32611, USA; (R.R.W.); (Y.Y.); (J.K.L.); (S.R.L.F.)
| | - Shireen R. L. Flores
- Food Science & Human Nutrition Department, University of Florida, Gainesville, FL 32611, USA; (R.R.W.); (Y.Y.); (J.K.L.); (S.R.L.F.)
| | - Didier Merlin
- Center for Diagnostics and Therapeutics, Institute for Biomedical Science, Georgia State University, Atlanta, GA 30303, USA; (M.Z.); (D.M.)
- Atlanta Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - James F. Collins
- Food Science & Human Nutrition Department, University of Florida, Gainesville, FL 32611, USA; (R.R.W.); (Y.Y.); (J.K.L.); (S.R.L.F.)
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Wilbrink J, Masclee G, Klaassen T, van Avesaat M, Keszthelyi D, Masclee A. Review on the Regional Effects of Gastrointestinal Luminal Stimulation on Appetite and Energy Intake: (Pre)clinical Observations. Nutrients 2021; 13:nu13051601. [PMID: 34064724 PMCID: PMC8151500 DOI: 10.3390/nu13051601] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/22/2021] [Accepted: 05/05/2021] [Indexed: 02/06/2023] Open
Abstract
Macronutrients in the gastrointestinal (GI) lumen are able to activate “intestinal brakes”, feedback mechanisms on proximal GI motility and secretion including appetite and energy intake. In this review, we provide a detailed overview of the current evidence with respect to four questions: (1) are regional differences (duodenum, jejunum, ileum) present in the intestinal luminal nutrient modulation of appetite and energy intake? (2) is this “intestinal brake” effect macronutrient specific? (3) is this “intestinal brake” effect maintained during repetitive activation? (4) can the “intestinal brake” effect be activated via non-caloric tastants? Recent evidence indicates that: (1) regional differences exist in the intestinal modulation of appetite and energy intake with a proximal to distal gradient for inhibition of energy intake: ileum and jejunum > duodenum at low but not at high caloric infusion rates. (2) the “intestinal brake” effect on appetite and energy appears not to be macronutrient specific. At equi-caloric amounts, the inhibition on energy intake and appetite is in the same range for fat, protein and carbohydrate. (3) data on repetitive ileal brake activation are scarce because of the need for prolonged intestinal intubation. During repetitive activation of the ileal brake for up to 4 days, no adaptation was observed but overall the inhibitory effect on energy intake was small. (4) the concept of influencing energy intake by intra-intestinal delivery of non-caloric tastants is intriguing. Among tastants, the bitter compounds appear to be more effective in influencing energy intake. Energy intake decreases modestly after post-oral delivery of bitter tastants or a combination of tastants (bitter, sweet and umami). Intestinal brake activation provides an interesting concept for preventive and therapeutic approaches in weight management strategies.
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Affiliation(s)
- Jennifer Wilbrink
- Division of Gastroenterology-Hepatology, Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands; (J.W.); (G.M.); (T.K.); (M.v.A.); (D.K.)
| | - Gwen Masclee
- Division of Gastroenterology-Hepatology, Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands; (J.W.); (G.M.); (T.K.); (M.v.A.); (D.K.)
| | - Tim Klaassen
- Division of Gastroenterology-Hepatology, Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands; (J.W.); (G.M.); (T.K.); (M.v.A.); (D.K.)
| | - Mark van Avesaat
- Division of Gastroenterology-Hepatology, Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands; (J.W.); (G.M.); (T.K.); (M.v.A.); (D.K.)
| | - Daniel Keszthelyi
- Division of Gastroenterology-Hepatology, Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands; (J.W.); (G.M.); (T.K.); (M.v.A.); (D.K.)
- NUTRIM School of Nutrition and Translational Research in Metabolism, 6229 ER Maastricht, The Netherlands
| | - Adrian Masclee
- Division of Gastroenterology-Hepatology, Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands; (J.W.); (G.M.); (T.K.); (M.v.A.); (D.K.)
- NUTRIM School of Nutrition and Translational Research in Metabolism, 6229 ER Maastricht, The Netherlands
- Correspondence: ; Tel.: +31-43-3875021
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Dong Z, Li L, Zhang Y, Guo L, Wu X, Yin Y, Wan D. Effects of circadian iron administration on iron bioavailability and biological rhythm in pigs. J Sci Food Agric 2021; 101:2712-2717. [PMID: 33124038 DOI: 10.1002/jsfa.10897] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 10/15/2020] [Accepted: 10/30/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Iron supplements are limited by their poor absorption and low efficacy. A circadian feeding schedule would affect the circadian rhythm and improve nutrient metabolism. In this study, 18 iron-deficient piglets were randomly assigned to three groups: a control group receiving a constant diet with mid-iron (MI), a 'HL' group receiving a high-iron (HI) diet at 8:00 h and a low-iron (LI) diet at 18:00, and an 'LH' group receiving a LI diet at 8:00 and a HI diet at 18:00. The effects of circadian iron administration on iron absorption, iron status, and biological rhythm in iron-deficient piglets were investigated. RESULTS Serum iron and hemoglobin improved significantly (P < 0.05) but did not significantly differ in the circadian iron-feeding groups (P > 0.05). Iron concentration in the liver and spleen was significantly higher in the LH group than in the HL group (P < 0.05), and mRNA expression of divalent metal transport 1 (DMT1), cytochrome B (CYBRD1) and ferroportin (FPN) genes in the duodenum was significantly elevated in the LH group (P < 0.05). The clock-related genes showed differential expression in the duodenum, with greater mRNA expression for period (Per2) and cryptochrome (Cry1 and Cry2) in the LH group (P < 0.05). CONCLUSION Circadian iron administration affected iron absorption and iron storage in pigs. Iron supplementation in the evening might be a more effective pattern for iron utilization. The rhythmic system in the intestine, driven by the time, played an important role in this process. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Zhenglin Dong
- Key Laboratory of Agro-Ecological Processess in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, China
- Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan international joint laboratory of Animal Intestinal Ecology and Health, College of Life Sciences, Hunan Normal University, Changsha, China
| | - Lan Li
- Key Laboratory of Agro-Ecological Processess in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, China
- Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan international joint laboratory of Animal Intestinal Ecology and Health, College of Life Sciences, Hunan Normal University, Changsha, China
| | - Yiming Zhang
- Key Laboratory of Agro-Ecological Processess in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, China
- Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan international joint laboratory of Animal Intestinal Ecology and Health, College of Life Sciences, Hunan Normal University, Changsha, China
| | - Liu Guo
- Key Laboratory of Agro-Ecological Processess in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, China
| | - Xin Wu
- Key Laboratory of Agro-Ecological Processess in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, China
| | - Yulong Yin
- Key Laboratory of Agro-Ecological Processess in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, China
- Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan international joint laboratory of Animal Intestinal Ecology and Health, College of Life Sciences, Hunan Normal University, Changsha, China
| | - Dan Wan
- Key Laboratory of Agro-Ecological Processess in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, China
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Enomoto H, Yeatts J, Carbajal L, Krishnan BR, Madan JP, Laumas S, Blikslager AT, Messenger KM. In vivo assessment of a delayed release formulation of larazotide acetate indicated for celiac disease using a porcine model. PLoS One 2021; 16:e0249179. [PMID: 33844694 PMCID: PMC8041193 DOI: 10.1371/journal.pone.0249179] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 03/12/2021] [Indexed: 12/13/2022] Open
Abstract
There is no FDA approved therapy for the treatment of celiac disease (CeD), aside from avoidance of dietary gluten. Larazotide acetate (LA) is a first in class oral peptide developed as a tight junction regulator, which is a lead candidate for management of CeD. A delayed release formulation was tested in vitro and predicted release in the mid duodenum and jejunum, the target site of CeD. The aim of this study was to follow the concentration versus time profile of orally administered LA in the small intestine using a porcine model. A sensitive liquid chromatography/tandem mass spectrometry method was developed to quantify LA concentrations in porcine intestinal fluid samples. Oral dosing of LA (1 mg total) in overnight fasted pigs resulted in time dependent appearance of LA in the distal duodenum and proximal jejunum. Peak LA concentrations (0.32–1.76 μM) occurred at 1 hour in the duodenum and in proximal jejunum following oral dosing, with the continued presence of LA (0.02–0.47 μM) in the distal duodenum and in proximal jejunum (0.00–0.43 μM) from 2 to 4 hours following oral dosing. The data shows that LA is available in detectable concentrations at the site of CeD.
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Affiliation(s)
- Hiroko Enomoto
- Comparative Medicine Institute, North Carolina State University, Raleigh, NC, United States of America
| | - James Yeatts
- Comparative Medicine Institute, North Carolina State University, Raleigh, NC, United States of America
| | - Liliana Carbajal
- Comparative Medicine Institute, North Carolina State University, Raleigh, NC, United States of America
| | - B. Radha Krishnan
- Innovate Biopharmaceuticals Inc., Raleigh, NC, United States of America
| | - Jay P. Madan
- Innovate Biopharmaceuticals Inc., Raleigh, NC, United States of America
| | - Sandeep Laumas
- Innovate Biopharmaceuticals Inc., Raleigh, NC, United States of America
| | - Anthony T. Blikslager
- Comparative Medicine Institute, North Carolina State University, Raleigh, NC, United States of America
| | - Kristen M. Messenger
- Comparative Medicine Institute, North Carolina State University, Raleigh, NC, United States of America
- * E-mail:
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Reynaud Y, Couvent A, Manach A, Forest D, Lopez M, Picque D, Souchon I, Rémond D, Dupont D. Food-dependent set-up of the DiDGI® dynamic in vitro system: Correlation with the porcine model for protein digestion of soya-based food. Food Chem 2021; 341:128276. [PMID: 33068848 DOI: 10.1016/j.foodchem.2020.128276] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 09/25/2020] [Accepted: 09/29/2020] [Indexed: 02/07/2023]
Abstract
The present study compared in vivo protein digestion in a miniature pig model with the dynamic in vitro system DiDGI®, using three digestive compartments (stomach, duodenum, and jejunum + ileum). Two soya-based meals-commercial soya milk and tofu-were studied, each with the same macronutrient content but different macrostructures. Our aim was to first deduce from the in vivo experiments in pigs key digestive parameters such as gastric pH, stomach emptying kinetics, and intestinal transit time, in order to design a relevant set-up for the dynamic in vitro system. Then, we compared digestive samples collected at fixed sampling times from both in vivo and in vitro models regarding different values related to proteolysis. We observed similar evolutions of gastric peptide distribution and duodenal proteolysis between models. Overall, apparent ileal digestibility of nitrogen was similar in vitro and in vivo and the differences between the two meals were conserved between models.
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Affiliation(s)
- Yohan Reynaud
- IMPROVE SAS, F-80480 Dury, France; STLO, INRAE, INSTITUT AGRO, F-35042 Rennes, France.
| | | | - Aline Manach
- Université Paris-Saclay, INRAE, AgroParisTech, SayFood, F-78850 Thiverval-Grignon, France.
| | - David Forest
- Université Paris-Saclay, INRAE, AgroParisTech, SayFood, F-78850 Thiverval-Grignon, France.
| | | | - Daniel Picque
- Université Paris-Saclay, INRAE, AgroParisTech, SayFood, F-78850 Thiverval-Grignon, France.
| | - Isabelle Souchon
- Université Paris-Saclay, INRAE, AgroParisTech, SayFood, F-78850 Thiverval-Grignon, France.
| | - Didier Rémond
- Université Clermont Auvergne, INRAE, UNH, Unité de Nutrition Humaine, F-63000 Clermont-Ferrand, France.
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De Angelis M, Siragusa S, Vacca M, Di Cagno R, Cristofori F, Schwarm M, Pelzer S, Flügel M, Speckmann B, Francavilla R, Gobbetti M. Selection of Gut-Resistant Bacteria and Construction of Microbial Consortia for Improving Gluten Digestion under Simulated Gastrointestinal Conditions. Nutrients 2021; 13:nu13030992. [PMID: 33808622 PMCID: PMC8003469 DOI: 10.3390/nu13030992] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 03/11/2021] [Accepted: 03/17/2021] [Indexed: 12/12/2022] Open
Abstract
This work aimed to define the microbial consortia that are able to digest gluten into non-toxic and non-immunogenic peptides in the human gastrointestinal tract. Methods: 131 out of 504 tested Bacillus and lactic acid bacteria, specifically Bacillus (64), lactobacilli (63), Pediococcus (1), and Weissella (3), showed strong gastrointestinal resistance and were selected for their PepN, PepI, PepX, PepO, and PepP activities toward synthetic substrates. Based on multivariate analysis, 24 strains were clearly distinct from the other tested strains based on having the highest enzymatic activities. As estimated by RP-HPLC and nano-ESI–MS/MS, 6 cytoplasmic extracts out of 24 selected strains showed the ability to hydrolyze immunogenic epitopes, specifically 57–68 of α9-gliadin, 62–75 of A-gliadin, 134–153 of γ-gliadin, and 57–89 (33-mer) of α2-gliadin. Live and lysed cells of selected strains were combined into different microbial consortia for hydrolyzing gluten under gastrointestinal conditions. Commercial proteolytic enzymes (Aspergillusoryzae E1, Aspergillusniger E2, Bacillussubtilis Veron HPP, and Veron PS proteases) were also added to each microbial consortium. Consortium activity was evaluated by ELISA tests, RP-HPLC-nano-ESI–MS/MS, and duodenal explants from celiac disease patients. Results: two microbial consortia (Consortium 4: Lactiplantibacillus (Lp.) plantarum DSM33363 and DSM33364, Lacticaseibacillus (Lc.) paracasei DSM33373, Bacillussubtilis DSM33298, and Bacilluspumilus DSM33301; and Consortium 16: Lp. plantarum DSM33363 and DSM33364, Lc. paracasei DSM33373, Limosilactobacillusreuteri DSM33374, Bacillusmegaterium DSM33300, B.pumilus DSM33297 and DSM33355), containing commercial enzymes, were able to hydrolyze gluten to non-toxic and non-immunogenic peptides under gastrointestinal conditions. Conclusions: the results of this study provide evidence that selected microbial consortia could potentially improve the digestion of gluten in gluten-sensitive patients by hydrolyzing the immunogenic peptides during gastrointestinal digestion.
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Affiliation(s)
- Maria De Angelis
- Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, 70126 Bari, Italy; (M.D.A.); (S.S.); (M.V.)
| | - Sonya Siragusa
- Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, 70126 Bari, Italy; (M.D.A.); (S.S.); (M.V.)
| | - Mirco Vacca
- Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, 70126 Bari, Italy; (M.D.A.); (S.S.); (M.V.)
| | - Raffaella Di Cagno
- Faculty of Science and Technology, Free University of Bozen, 39100 Bolzano, Italy;
| | - Fernanda Cristofori
- Interdisciplinary Department of Medicine-Pediatric Section, University of Bari Aldo Moro, Ospedale Pediatrico Giovanni XXIII, 70125 Bari, Italy; (F.C.); (R.F.)
| | - Michael Schwarm
- Evonik Operations GmbH, 63457 Hanau-Wolfgang, Germany; (M.S.); (S.P.); (M.F.); (B.S.)
| | - Stefan Pelzer
- Evonik Operations GmbH, 63457 Hanau-Wolfgang, Germany; (M.S.); (S.P.); (M.F.); (B.S.)
| | - Monika Flügel
- Evonik Operations GmbH, 63457 Hanau-Wolfgang, Germany; (M.S.); (S.P.); (M.F.); (B.S.)
| | - Bodo Speckmann
- Evonik Operations GmbH, 63457 Hanau-Wolfgang, Germany; (M.S.); (S.P.); (M.F.); (B.S.)
| | - Ruggiero Francavilla
- Interdisciplinary Department of Medicine-Pediatric Section, University of Bari Aldo Moro, Ospedale Pediatrico Giovanni XXIII, 70125 Bari, Italy; (F.C.); (R.F.)
| | - Marco Gobbetti
- Faculty of Science and Technology, Free University of Bozen, 39100 Bolzano, Italy;
- Correspondence: ; Tel.: +39-0471-017215
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Busslinger GA, Weusten BLA, Bogte A, Begthel H, Brosens LAA, Clevers H. Human gastrointestinal epithelia of the esophagus, stomach, and duodenum resolved at single-cell resolution. Cell Rep 2021; 34:108819. [PMID: 33691112 DOI: 10.1016/j.celrep.2021.108819] [Citation(s) in RCA: 118] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 12/23/2020] [Accepted: 02/10/2021] [Indexed: 12/12/2022] Open
Abstract
The upper gastrointestinal tract, consisting of the esophagus, stomach, and duodenum, controls food transport, digestion, nutrient uptake, and hormone production. By single-cell analysis of healthy epithelia of these human organs, we molecularly define their distinct cell types. We identify a quiescent COL17A1high KRT15high stem/progenitor cell population in the most basal cell layer of the esophagus and detect substantial gene expression differences between identical cell types of the human and mouse stomach. Selective expression of BEST4, CFTR, guanylin, and uroguanylin identifies a rare duodenal cell type, referred to as BCHE cell, which likely mediates high-volume fluid secretion because of continual activation of the CFTR channel by guanylin/uroguanylin-mediated autocrine signaling. Serotonin-producing enterochromaffin cells in the antral stomach significantly differ in gene expression from duodenal enterochromaffin cells. We, furthermore, discover that the histamine-producing enterochromaffin-like cells in the oxyntic stomach express the luteinizing hormone, yet another member of the enteroendocrine hormone family.
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Affiliation(s)
- Georg A Busslinger
- Hubrecht Institute and Oncode Institute, Royal Netherlands Academy of Arts and Sciences (KNAW), Utrecht, the Netherlands; Princess Maxima Center for Pediatric Oncology, Utrecht, the Netherlands
| | - Bas L A Weusten
- Department of Gastroenterology and Hepatology, UMC Utrecht, University of Utrecht, Utrecht, the Netherlands
| | - Auke Bogte
- Department of Gastroenterology and Hepatology, UMC Utrecht, University of Utrecht, Utrecht, the Netherlands
| | - Harry Begthel
- Hubrecht Institute and Oncode Institute, Royal Netherlands Academy of Arts and Sciences (KNAW), Utrecht, the Netherlands
| | - Lodewijk A A Brosens
- Department of Pathology, UMC Utrecht, University of Utrecht, Utrecht, the Netherlands
| | - Hans Clevers
- Hubrecht Institute and Oncode Institute, Royal Netherlands Academy of Arts and Sciences (KNAW), Utrecht, the Netherlands; Princess Maxima Center for Pediatric Oncology, Utrecht, the Netherlands.
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Phillips CL, Welch BA, Garrett MR, Grayson BE. Regional heterogeneity in rat Peyer's patches through whole transcriptome analysis. Exp Biol Med (Maywood) 2021; 246:513-522. [PMID: 33236653 PMCID: PMC7934146 DOI: 10.1177/1535370220973014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 10/20/2020] [Indexed: 11/17/2022] Open
Abstract
Peyer's patches are gut-associated lymphoid tissue located throughout the intestinal wall. Peyer's patches consist of highly organized ovoid-shaped follicles, classified as non-encapsulated lymphatic tissues, populated with B cells, T cells, macrophages, and dendritic cells and function as an organism's intestinal surveillance. Limited work compares the gene profiles of Peyer's patches derived from different intestinal regions. In the current study, we first performed whole transcriptome analysis using RNAseq to compare duodenal and ileal Peyer's patches obtained from the small intestine of Long Evans rats. Of the 12,300 genes that were highly expressed, 18.5% were significantly different between the duodenum and ileum. Using samples obtained from additional subjects (n = 10), we validated the novel gene expression patterns in Peyer's patches obtained from the three regions of the small intestine. Rats had a significantly reduced number of Peyer's patches in the duodenum in comparison to either the jejunum or ileum. Regional differences in structural, metabolic, and immune-related genes were validated. Genes such as alcohol dehydrogenase 1, gap junction protein beta 2, and serine peptidase inhibitor clade b, member 1a were significantly reduced in the ileum in comparison to other regions. On the other hand, genes such as complement C3d receptor type, lymphocyte cytosolic protein 1, and lysozyme C2 precursor were significantly lower in the duodenum. In summary, the gene expression pattern of Peyer's patches is influenced by intestinal location and may contribute to its role in that segment.
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Affiliation(s)
- Charles L Phillips
- Program in Pathology, University of Mississippi Medical Center, Jackson, MS 39216, USA
- Department of Neurobiology and Anatomical Sciences, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Bradley A Welch
- Department of Neurobiology and Anatomical Sciences, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Michael R Garrett
- Department of Pharmacology, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Bernadette E Grayson
- Department of Neurobiology and Anatomical Sciences, University of Mississippi Medical Center, Jackson, MS 39216, USA
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Pianezze S, Corazzin M, Perini M, Camin F, Paolini M, Sepulcri A, Saccà E, Fabro C, Piasentier E. Fatty acids stable carbon isotope fractionation in the bovine organism. A compound-specific isotope analysis through gas chromatography combustion isotope ratio mass spectrometry. J Chromatogr A 2021; 1641:461966. [PMID: 33618180 DOI: 10.1016/j.chroma.2021.461966] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 01/25/2021] [Accepted: 01/31/2021] [Indexed: 11/17/2022]
Abstract
The contribution of dietary fatty acids to the quality of the meat and their path through the bovine organism is currently the subject of a lot of research. Stable isotope ratio analysis represents a powerful tool for this aim, one that has not been studied in depth yet. In this work, for the first time, the carbon isotopic ratios of six fatty acids (myristic 14:0, palmitic 16:0, stearic 18:0, oleic 18:1n-9, linoleic 18:2n-6 and linolenic 18:3n-3 acids) in different matrixes (diet, rumen, duodenal content, liver and loin) were analysed through gas chromatography combustion isotope ratio mass spectrometry. Moreover, the quantification of the single fatty acids was carried out, providing important information supporting the carbon isotopic ratio results. The variation in the concentration of the fatty acids in the different matrices depends on the chemical modifications they undergo in the sequential steps of the metabolic path. GC-C-IRMS turned out to be a powerful tool to investigate the fate of dietary fatty acids, providing information about the processes they undergo inside the bovine organism.
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Affiliation(s)
- Silvia Pianezze
- Fondazione Edmund Mach, Via Mach 1, San Michele All'Adige, Trento, Italy; Department of Agricultural, Food, Environmental and Animal Sciences DI4A, University of Udine (UD), Italy
| | - Mirco Corazzin
- Department of Agricultural, Food, Environmental and Animal Sciences DI4A, University of Udine (UD), Italy
| | - Matteo Perini
- Fondazione Edmund Mach, Via Mach 1, San Michele All'Adige, Trento, Italy.
| | - Federica Camin
- Fondazione Edmund Mach, Via Mach 1, San Michele All'Adige, Trento, Italy; Centre Agriculture Food Environment C3A, University of Trento, San Michele all'Adige, Trento, Italy
| | - Mauro Paolini
- Fondazione Edmund Mach, Via Mach 1, San Michele All'Adige, Trento, Italy
| | - Angela Sepulcri
- Department of Agricultural, Food, Environmental and Animal Sciences DI4A, University of Udine (UD), Italy
| | - Elena Saccà
- Department of Agricultural, Food, Environmental and Animal Sciences DI4A, University of Udine (UD), Italy
| | - Carla Fabro
- Department of Agricultural, Food, Environmental and Animal Sciences DI4A, University of Udine (UD), Italy
| | - Edi Piasentier
- Department of Agricultural, Food, Environmental and Animal Sciences DI4A, University of Udine (UD), Italy
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Franco R. Geoffrey Burnstock (1929-2020): the finest pharmacologist and an inspiring scientist. Purinergic Signal 2021; 17:135. [PMID: 33528695 DOI: 10.1007/s11302-021-09769-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 01/21/2021] [Indexed: 11/26/2022] Open
Affiliation(s)
- Rafael Franco
- Department of Biochemistry and Molecular Biomedicine, Facultat de Biologia, University of Barcelona, Diagonal 643, 08028, Barcelona, Spain.
- Centro de Investigación en Red, Enfermedades Neurodegenerativas (CiberNed), Carlos iii National Health Institute, Madrid, Spain.
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Pereira JNB, Murata GM, Sato FT, Marosti AR, Carvalho CRDO, Curi R. Small intestine remodeling in male Goto-Kakizaki rats. Physiol Rep 2021; 9:e14755. [PMID: 33580916 PMCID: PMC7881800 DOI: 10.14814/phy2.14755] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 01/19/2021] [Accepted: 01/19/2021] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Obesity is associated with the development of insulin resistance (IR) and type-2 diabetes mellitus (T2DM); however, not all patients with T2DM are obese. The Goto-Kakizaki (GK) rat is an experimental model of spontaneous and non-obese T2DM. There is evidence that the intestine contributes to IR development in GK animals. This information prompted us to investigate small intestine remodeling in this animal model. METHODS Four-month-old male Wistar (control) and GK rats were utilized for the present study. After removing the small intestine, the duodenum, proximal jejunum, and distal ileum were separated. We then measured villi and muscular and mucosa layer histomorphometry, goblet cells abundance, total myenteric and submucosal neuron populations, and inflammatory marker expression in the small intestinal segments and intestinal transit of both groups of animals. KEY RESULTS We found that the GK rats exhibited decreased intestinal area (p < 0.0001), decreased crypt depth in the duodenum (p = 0.01) and ileum (p < 0.0001), increased crypt depth in the jejunum (p < 0.0001), longer villi in the jejunum and ileum (p < 0.0001), thicker villi in the duodenum (p < 0.01) and ileum (p < 0.0001), thicker muscular layers in the duodenum, jejunum, and ileum (p < 0.0001), increased IL-1β concentrations in the duodenum and jejunum (p < 0.05), and increased concentrations of NF-κB p65 in the duodenum (p < 0.01), jejunum and ileum (p < 0.05). We observed high IL-1β reactivity in the muscle layer, myenteric neurons, and glial cells of the experimental group. GK rats also exhibited a significant reduction in submucosal neuron density in the jejunum and ileum, ganglionic hypertrophy in all intestinal segments studied (p < 0.0001), and a slower intestinal transit (about 25%) compared to controls. CONCLUSIONS The development of IR and T2DM in GK rats is associated with small intestine remodeling that includes marked alterations in small intestine morphology, local inflammation, and reduced intestinal transit.
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Affiliation(s)
| | | | - Fabio Takeo Sato
- Department of GeneticsEvolution, Microbiology and ImmunologyInstitute of BiologyState University of CampinasCampinasBrazil
| | | | | | - Rui Curi
- Interdisciplinary Post‐Graduate Program in Health SciencesCruzeiro do Sul UniversitySão PauloBrazil
- Department of Physiology and BiophysicsInstitute of Biomedical SciencesUniversity of São PauloSão PauloBrazil
- Butantan InstituteSão PauloBrazil
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Behrens JL, Schnepel N, Hansen K, Hustedt K, Burmester M, Klinger S, Breves G, Muscher-Banse AS. Modulation of Intestinal Phosphate Transport in Young Goats Fed a Low Phosphorus Diet. Int J Mol Sci 2021; 22:ijms22020866. [PMID: 33467106 PMCID: PMC7831023 DOI: 10.3390/ijms22020866] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 01/07/2021] [Accepted: 01/13/2021] [Indexed: 12/03/2022] Open
Abstract
The intestinal absorption of phosphate (Pi) takes place transcellularly through the active NaPi-cotransporters type IIb (NaPiIIb) and III (PiT1 and PiT2) and paracellularly by diffusion through tight junction (TJ) proteins. The localisation along the intestines and the regulation of Pi absorption differ between species and are not fully understood. It is known that 1,25-dihydroxy-vitamin D3 (1,25-(OH)2D3) and phosphorus (P) depletion modulate intestinal Pi absorption in vertebrates in different ways. In addition to the apical uptake into the enterocytes, there are uncertainties regarding the basolateral excretion of Pi. Functional ex vivo experiments in Ussing chambers and molecular studies of small intestinal epithelia were carried out on P-deficient goats in order to elucidate the transepithelial Pi route in the intestine as well as the underlying mechanisms of its regulation and the proteins, which may be involved. The dietary P reduction had no effect on the duodenal and ileal Pi transport rate in growing goats. The ileal PiT1 and PiT2 mRNA expressions increased significantly, while the ileal PiT1 protein expression, the mid jejunal claudin-2 mRNA expression and the serum 1,25-(OH)2D3 levels were significantly reduced. These results advance the state of knowledge concerning the complex mechanisms of the Pi homeostasis in vertebrates.
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Wu H, Chen Y, Huang B, Yu Y, Zhao S, Liu J, Jia Z, Xiao H. Aster tataricus alleviates constipation by antagonizing the binding of acetylcholine to muscarinic receptor and inhibiting Ca 2+ influx. Biomed Pharmacother 2021; 133:111005. [PMID: 33378996 DOI: 10.1016/j.biopha.2020.111005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 11/04/2020] [Accepted: 11/08/2020] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND The dried root and rhizome of Aster tataricus (RA), is a traditional Chinese medicine has been used for more than 2000 years with the function of antitussive, expectorant and antiasthmatic. Ancient books and modern pharmacological researches demonstrated that RA may have the function of moistening intestines and relieving constipation, but there was a lack of systematic evidence. The aim of this study was to comprehensively evaluate the efficacy and possible mechanisms of ethanol extract of Aster tataricus (ATE) in treating constipation from in vivo to in vitro. METHODS In vivo, the ATE was studied in loperamide-induced constipation of mice. In vitro, different concentrations of ATE was tested separately or cumulatively on spontaneous and agonists-induced contractions of isolated rat duodenum strips. RESULTS In vivo, at doses of 0.16, 0.8 g/mL, ATE showed significantly promotion of the small intestinal charcoal transit, decrease of the amount of remnant fecal, and increase of the content of fecal water in colon. In addition, ATE could effectively relieve colonic pathological damage caused by loperamide as well. In vitro, with the cumulative concentration increase of ATE from 0.8 to 6.4 mg/mL, it could significantly decrease the contraction caused by KCl or Ach, and gradually restore to near base tension value.Meanwhile, it could also partially but significantly inhibit the contractions induced by Ach and CaCl2 on rat duodenum in a concentration related manner. CONCLUSIONS Taking all these findings together, it could be speculated that ATE may attenuate constipation mainly through antagonizing the binding of acetylcholine to muscarinic receptor, inhibiting Ca2+ influx and anti-inflammation.
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Affiliation(s)
- Hao Wu
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Yijun Chen
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China; Beijing Key Laboratory of Syndrome Prescription Basic Research, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Beibei Huang
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Yingting Yu
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Shujun Zhao
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Jie Liu
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China.
| | - Zhixin Jia
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Hongbin Xiao
- Research Center of Chinese Medicine Analysis and Transformation, Beijing University of Chinese Medicine, Beijing, 100029, China; Beijing Key Laboratory of Syndrome Prescription Basic Research, Beijing University of Chinese Medicine, Beijing, 100029, China.
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Jończy A, Mazgaj R, Starzyński RR, Poznański P, Szudzik M, Smuda E, Kamyczek M, Lipiński P. Relationship between Down-Regulation of Copper-Related Genes and Decreased Ferroportin Protein Level in the Duodenum of Iron-Deficient Piglets. Nutrients 2020; 13:nu13010104. [PMID: 33396831 PMCID: PMC7823587 DOI: 10.3390/nu13010104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/26/2020] [Accepted: 12/27/2020] [Indexed: 12/14/2022] Open
Abstract
In mammals, 2 × 1012 red blood cells (RBCs) are produced every day in the bone marrow to ensure a constant supply of iron to maintain effective erythropoiesis. Impaired iron absorption in the duodenum and inefficient iron reutilization from senescent RBCs by macrophages contribute to the development of anemia. Ferroportin (Fpn), the only known cellular iron exporter, as well as hephaestin (Heph) and ceruloplasmin, two copper-dependent ferroxidases involved in the above-mentioned processes, are key elements of the interaction between copper and iron metabolisms. Crosslinks between these metals have been known for many years, but metabolic effects of one on the other have not been elucidated to date. Neonatal iron deficiency anemia in piglets provides an interesting model for studying this interplay. In duodenal enterocytes of young anemic piglets, we identified iron deposits and demonstrated increased expression of ferritin with a concomitant decline in both Fpn and Heph expression. We postulated that the underlying mechanism involves changes in copper distribution within enterocytes as a result of decreased expression of the copper transporter—Atp7b. Obtained results strongly suggest that regulation of iron absorption within enterocytes is based on the interaction between proteins of copper and iron metabolisms and outcompetes systemic regulation.
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Affiliation(s)
- Aneta Jończy
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology, PAS, 05-552 Jastrzębiec, Poland; (R.M.); (R.R.S.); (M.S.); (E.S.)
- Correspondence: (A.J.); (P.L.); Tel.: +48-227-367-058 (A.J.); +48-227-367-046 (P.L.)
| | - Rafał Mazgaj
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology, PAS, 05-552 Jastrzębiec, Poland; (R.M.); (R.R.S.); (M.S.); (E.S.)
| | - Rafał Radosław Starzyński
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology, PAS, 05-552 Jastrzębiec, Poland; (R.M.); (R.R.S.); (M.S.); (E.S.)
| | - Piotr Poznański
- Department of Experimental Genomics, Institute of Genetics and Animal Biotechnology, PAS, 05-552 Jastrzębiec, Poland;
| | - Mateusz Szudzik
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology, PAS, 05-552 Jastrzębiec, Poland; (R.M.); (R.R.S.); (M.S.); (E.S.)
| | - Ewa Smuda
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology, PAS, 05-552 Jastrzębiec, Poland; (R.M.); (R.R.S.); (M.S.); (E.S.)
| | - Marian Kamyczek
- Pig Hybridization Centre, National Research Institute of Animal Production, 64-122 Pawłowice, Poland;
| | - Paweł Lipiński
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology, PAS, 05-552 Jastrzębiec, Poland; (R.M.); (R.R.S.); (M.S.); (E.S.)
- Correspondence: (A.J.); (P.L.); Tel.: +48-227-367-058 (A.J.); +48-227-367-046 (P.L.)
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van Rijn JM, Werner L, Aydemir Y, Spronck JM, Pode-Shakked B, van Hoesel M, Shimshoni E, Polak-Charcon S, Talmi L, Eren M, Weiss B, H.J. Houwen R, Barshack I, Somech R, Nieuwenhuis EE, Sagi I, Raas-Rothschild A, Middendorp S, Shouval DS. Enhanced Collagen Deposition in the Duodenum of Patients with Hyaline Fibromatosis Syndrome and Protein Losing Enteropathy. Int J Mol Sci 2020; 21:E8200. [PMID: 33147779 PMCID: PMC7662532 DOI: 10.3390/ijms21218200] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 10/28/2020] [Accepted: 10/29/2020] [Indexed: 12/25/2022] Open
Abstract
Hyaline fibromatosis syndrome (HFS), resulting from ANTXR2 mutations, is an ultra-rare disease that causes intestinal lymphangiectasia and protein-losing enteropathy (PLE). The mechanisms leading to the gastrointestinal phenotype in these patients are not well defined. We present two patients with congenital diarrhea, severe PLE and unique clinical features resulting from deleterious ANTXR2 mutations. Intestinal organoids were generated from one of the patients, along with CRISPR-Cas9 ANTXR2 knockout, and compared with organoids from two healthy controls. The ANTXR2-deficient organoids displayed normal growth and polarity, compared to controls. Using an anthrax-toxin assay we showed that the c.155C>T mutation causes loss-of-function of ANTXR2 protein. An intrinsic defect of monolayer formation in patient-derived or ANTXR2KO organoids was not apparent, suggesting normal epithelial function. However, electron microscopy and second harmonic generation imaging showed abnormal collagen deposition in duodenal samples of these patients. Specifically, collagen VI, which is known to bind ANTXR2, was highly expressed in the duodenum of these patients. In conclusion, despite resistance to anthrax-toxin, epithelial cell function, and specifically monolayer formation, is intact in patients with HFS. Nevertheless, loss of ANTXR2-mediated signaling leads to collagen VI accumulation in the duodenum and abnormal extracellular matrix composition, which likely plays a role in development of PLE.
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Affiliation(s)
- Jorik M. van Rijn
- Division of Pediatrics, Department of Pediatric Gastroenterology, Wilhelmina Children’s Hospital, University Medical Center Utrecht (UMCU), Utrecht University (UU), 3584 CT Utrecht, The Netherlands; (J.M.v.R.); (J.M.A.S.); (M.v.H.); (R.H.J.H.); (E.E.S.N.)
- Regenerative Medicine Center, UMCU, UU, 3584 CT Utrecht, The Netherlands
| | - Lael Werner
- Pediatric Gastroenterology Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Ramat Gan 5262100, Israel; (L.W.); (B.W.)
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel; (B.P.-S.); (S.P.-C.); (L.T.); (I.B.); (R.S.); (A.R.-R.)
| | - Yusuf Aydemir
- Department of Pediatrics, Division of Pediatric Gastroenterology and Hepatology, Eskisehir Osmangazi University Faculty of Medicine, Eskisehir 26040, Turkey; (Y.A.); (M.E.)
| | - Joey M.A. Spronck
- Division of Pediatrics, Department of Pediatric Gastroenterology, Wilhelmina Children’s Hospital, University Medical Center Utrecht (UMCU), Utrecht University (UU), 3584 CT Utrecht, The Netherlands; (J.M.v.R.); (J.M.A.S.); (M.v.H.); (R.H.J.H.); (E.E.S.N.)
- Regenerative Medicine Center, UMCU, UU, 3584 CT Utrecht, The Netherlands
| | - Ben Pode-Shakked
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel; (B.P.-S.); (S.P.-C.); (L.T.); (I.B.); (R.S.); (A.R.-R.)
- The Institute for Rare Diseases, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Ramat Gan 5262100, Israel
- Talpiot Medical Leadership Program, Sheba Medical Center, Ramat Gan 5262100, Israel
| | - Marliek van Hoesel
- Division of Pediatrics, Department of Pediatric Gastroenterology, Wilhelmina Children’s Hospital, University Medical Center Utrecht (UMCU), Utrecht University (UU), 3584 CT Utrecht, The Netherlands; (J.M.v.R.); (J.M.A.S.); (M.v.H.); (R.H.J.H.); (E.E.S.N.)
- Regenerative Medicine Center, UMCU, UU, 3584 CT Utrecht, The Netherlands
| | - Elee Shimshoni
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel; (E.S.); (I.S.)
| | - Sylvie Polak-Charcon
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel; (B.P.-S.); (S.P.-C.); (L.T.); (I.B.); (R.S.); (A.R.-R.)
- Institute of Pathology, Sheba Medical Center, Ramat Gan 5262100, Israel
| | - Liron Talmi
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel; (B.P.-S.); (S.P.-C.); (L.T.); (I.B.); (R.S.); (A.R.-R.)
- Pediatric Department A, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Ramat Gan 5262100, Israel
| | - Makbule Eren
- Department of Pediatrics, Division of Pediatric Gastroenterology and Hepatology, Eskisehir Osmangazi University Faculty of Medicine, Eskisehir 26040, Turkey; (Y.A.); (M.E.)
| | - Batia Weiss
- Pediatric Gastroenterology Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Ramat Gan 5262100, Israel; (L.W.); (B.W.)
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel; (B.P.-S.); (S.P.-C.); (L.T.); (I.B.); (R.S.); (A.R.-R.)
| | - Roderick H.J. Houwen
- Division of Pediatrics, Department of Pediatric Gastroenterology, Wilhelmina Children’s Hospital, University Medical Center Utrecht (UMCU), Utrecht University (UU), 3584 CT Utrecht, The Netherlands; (J.M.v.R.); (J.M.A.S.); (M.v.H.); (R.H.J.H.); (E.E.S.N.)
| | - Iris Barshack
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel; (B.P.-S.); (S.P.-C.); (L.T.); (I.B.); (R.S.); (A.R.-R.)
- Institute of Pathology, Sheba Medical Center, Ramat Gan 5262100, Israel
| | - Raz Somech
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel; (B.P.-S.); (S.P.-C.); (L.T.); (I.B.); (R.S.); (A.R.-R.)
- Pediatric Department A, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Ramat Gan 5262100, Israel
- Immunology Service, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Ramat Gan 5262100, Israel
- Jeffrey Modell Foundation Center, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Ramat Gan 5262100, Israel
| | - Edward E.S. Nieuwenhuis
- Division of Pediatrics, Department of Pediatric Gastroenterology, Wilhelmina Children’s Hospital, University Medical Center Utrecht (UMCU), Utrecht University (UU), 3584 CT Utrecht, The Netherlands; (J.M.v.R.); (J.M.A.S.); (M.v.H.); (R.H.J.H.); (E.E.S.N.)
| | - Irit Sagi
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel; (E.S.); (I.S.)
| | - Annick Raas-Rothschild
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel; (B.P.-S.); (S.P.-C.); (L.T.); (I.B.); (R.S.); (A.R.-R.)
- The Institute for Rare Diseases, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Ramat Gan 5262100, Israel
| | - Sabine Middendorp
- Division of Pediatrics, Department of Pediatric Gastroenterology, Wilhelmina Children’s Hospital, University Medical Center Utrecht (UMCU), Utrecht University (UU), 3584 CT Utrecht, The Netherlands; (J.M.v.R.); (J.M.A.S.); (M.v.H.); (R.H.J.H.); (E.E.S.N.)
- Regenerative Medicine Center, UMCU, UU, 3584 CT Utrecht, The Netherlands
| | - Dror S. Shouval
- Pediatric Gastroenterology Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Ramat Gan 5262100, Israel; (L.W.); (B.W.)
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel; (B.P.-S.); (S.P.-C.); (L.T.); (I.B.); (R.S.); (A.R.-R.)
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Nojkov B, Zhou SY, Dolan RD, Davis EM, Appelman HD, Guo X, Jackson K, Sturm MB, Wang TD, Owyang C, Liu JJ, Chey WD. Evidence of Duodenal Epithelial Barrier Impairment and Increased Pyroptosis in Patients With Functional Dyspepsia on Confocal Laser Endomicroscopy and "Ex Vivo" Mucosa Analysis. Am J Gastroenterol 2020; 115:1891-1901. [PMID: 33156108 PMCID: PMC8409129 DOI: 10.14309/ajg.0000000000000827] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Duodenal epithelial barrier impairment and immune activation may play a role in the pathogenesis of functional dyspepsia (FD). This study was aimed to evaluate the duodenal epithelium of patients with FD and healthy individuals for detectable microscopic structural abnormalities. METHODS This is a prospective study using esophagogastroduodenoscopy enhanced with duodenal confocal laser endomicroscopy (CLE) and mucosal biopsies in patients with FD (n = 16) and healthy controls (n = 18). Blinded CLE images analysis evaluated the density of epithelial gaps (cell extrusion zones), a validated endoscopic measure of the intestinal barrier status. Analyses of the biopsied duodenal mucosa included standard histology, quantification of mucosal immune cells/cytokines, and immunohistochemistry for inflammatory epithelial cell death called pyroptosis. Transepithelial electrical resistance (TEER) was measured using Ussing chambers. Epithelial cell-to-cell adhesion proteins expression was assessed by real-time polymerase chain reaction. RESULTS Patients with FD had significantly higher epithelial gap density on CLE in the distal duodenum than that of controls (P = 0.002). These mucosal abnormalities corresponded to significant changes in the duodenal biopsy samples of patients with FD, compared with controls, including impaired mucosal integrity by TEER (P = 0.009) and increased number of epithelial cells undergoing pyroptosis (P = 0.04). Reduced TEER inversely correlated with the severity of certain dyspeptic symptoms. Furthermore, patients with FD demonstrated altered duodenal expression of claudin-1 and interleukin-6. No differences in standard histology were found between the groups. DISCUSSION This is the first report of duodenal CLE abnormalities in patients with FD, corroborated by biopsy findings of epithelial barrier impairment and increased cell death, implicating that duodenal barrier disruption is a pathogenesis factor in FD and introducing CLE a potential diagnostic biomarker in FD.
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Affiliation(s)
- Borko Nojkov
- Division of Gastroenterology and Hepatology, Michigan Medicine, Ann Arbor, Michigan, USA
| | - Shi-Yi Zhou
- Division of Gastroenterology and Hepatology, Michigan Medicine, Ann Arbor, Michigan, USA
| | - Russell D. Dolan
- Department of Internal Medicine, Michigan Medicine, Ann Arbor, Michigan, USA
| | - Elisabeth M. Davis
- Division of Gastroenterology and Hepatology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Henry D. Appelman
- Department of Pathology, Michigan Medicine, Ann Arbor, Michigan, USA
| | - Xueyan Guo
- Division of Gastroenterology and Hepatology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Kenya Jackson
- Division of Gastroenterology and Hepatology, Michigan Medicine, Ann Arbor, Michigan, USA
| | - Matthew B. Sturm
- Division of Gastroenterology and Hepatology, Michigan Medicine, Ann Arbor, Michigan, USA
| | - Thomas D. Wang
- Division of Gastroenterology and Hepatology, Michigan Medicine, Ann Arbor, Michigan, USA
| | - Chung Owyang
- Division of Gastroenterology and Hepatology, Michigan Medicine, Ann Arbor, Michigan, USA
| | - Julia J. Liu
- Division of Gastroenterology and Hepatology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - William D. Chey
- Division of Gastroenterology and Hepatology, Michigan Medicine, Ann Arbor, Michigan, USA
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Mohammad MA, Didelija IC, Stoll B, Burrin DG, Marini JC. Modeling age-dependent developmental changes in the expression of genes involved in citrulline synthesis using pig enteroids. Physiol Rep 2020; 8:e14565. [PMID: 33181004 PMCID: PMC7660678 DOI: 10.14814/phy2.14565] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 08/03/2020] [Accepted: 08/07/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Age-dependent changes in the intestinal gene expression of enzymes involved in the metabolism of citrulline and arginine are well characterized. Enteroids, a novel ex-vivo model that recreates the three-dimensional structure of the intestinal crypt-villus unit, have shown to replicate molecular and physiological profiles of the intestinal segment from where they originated ("location memory"). OBJECTIVE The present study tested the hypothesis that enteroids recapitulate the developmental changes observed in vivo regarding citrulline production in pigs ("developmental memory"). METHODS Preterm (10- and 5-d preterm) and term pigs at birth, together with 7- and 35-d-old pigs were studied. Gene expression was measured in jejunal samples and in enteroids derived from this segment. Whole body citrulline production was measured by isotope dilution and enteroid citrulline production by accumulation in the media. RESULTS With the exception of arginase I and inducible nitric oxide synthase, all the genes investigated expressed in jejunum were expressed by enteroids. In the jejunum, established markers of development (lactase and sucrase-isomaltase), as well as genes that code for enzymes involved in the production and utilization of citrulline and arginine, underwent the ontogenic changes described in the literature. However, enteroid expression of these genes, as well as citrulline production, failed to recapitulate the changes observed in vivo. CONCLUSIONS Under culture conditions used in our study, enteroids derived from jejunal crypts of pigs at different ages failed to replicate the gene expression observed in whole tissue and whole body citrulline production. Additional extracellular cues may be needed to reproduce the age-dependent phenotype.
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Affiliation(s)
- Mahmoud A. Mohammad
- USDA/ARS Children’s Nutrition Research CenterBaylor College of MedicineHoustonTXUSA
- Food Science and Nutrition DepartmentNational Research CentreDokki, GizaEgypt
| | - Inka C. Didelija
- USDA/ARS Children’s Nutrition Research CenterBaylor College of MedicineHoustonTXUSA
| | - Barbara Stoll
- USDA/ARS Children’s Nutrition Research CenterBaylor College of MedicineHoustonTXUSA
| | - Douglas G. Burrin
- USDA/ARS Children’s Nutrition Research CenterBaylor College of MedicineHoustonTXUSA
| | - Juan C. Marini
- USDA/ARS Children’s Nutrition Research CenterBaylor College of MedicineHoustonTXUSA
- Pediatric Critical Care MedicineDepartment of PediatricsBaylor College of MedicineHoustonTXUSA
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Bolla AM, Butera E, Pellegrini S, Caretto A, Bonfanti R, Zuppardo RA, Barera G, Cavestro GM, Sordi V, Bosi E. Expression of glucose transporters in duodenal mucosa of patients with type 1 diabetes. Acta Diabetol 2020; 57:1367-1373. [PMID: 32617672 DOI: 10.1007/s00592-020-01558-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 06/10/2020] [Indexed: 12/29/2022]
Abstract
AIMS A higher SGLT1 and GLUT2 gene expression was shown in the intestine of subjects with type 2 diabetes, while no data have been reported in type 1 diabetes (T1D). The purpose of our study was to evaluate the expression of glucose transporters in duodenal mucosa of subjects with T1D, compared to healthy controls (CTRL) and to patients with celiac disease (CD), as gut inflammatory disease control group. MATERIALS AND METHODS Gene expression of GLUT1, GLUT2, SGLT1 and SGLT2 was quantified on duodenal mucosa biopsies of subjects with T1D (n = 19), CD (n = 16), T1D and CD (n = 6) and CTRL (n = 12), recruited at San Raffaele Hospital (Milan, Italy), between 2009 and 2018. SGLT2 expression was further evaluated by immunohistochemical and immunofluorescence staining. RESULTS The expression of all four glucose transporters was detected in duodenal mucosa of all groups. A reduced GLUT2, SGLT1 and SGLT2 expression was observed in CD in comparison with T1D and CTRL, as expected; GLUT1 was significantly more expressed in T1D compared to CTRL. SGLT2 expression was quantified at much lower levels than other transporters, with no differences between groups. SGLT2 expression was confirmed by immunohistochemistry in a restricted number of enterocytes lining in the mucosa of intestinal villi, also shown on immunofluorescence. CONCLUSIONS Our results show that glucose transporters expression in duodenal mucosa of subjects with T1D, except an increased GLUT1, is not different from that observed in healthy controls. The expression of SGLT2 in human duodenal mucosa, although at low intensity, represents a novel finding.
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Affiliation(s)
- Andrea Mario Bolla
- Diabetes Research Institute, IRCCS San Raffaele Hospital, 20132, Milan, Italy
| | - Elena Butera
- Diabetes Research Institute, IRCCS San Raffaele Hospital, 20132, Milan, Italy
- San Raffaele Vita Salute University, Via Olgettina 60, 20132, Milan, Italy
| | - Silvia Pellegrini
- Diabetes Research Institute, IRCCS San Raffaele Hospital, 20132, Milan, Italy
| | - Amelia Caretto
- Diabetes Research Institute, IRCCS San Raffaele Hospital, 20132, Milan, Italy
| | - Riccardo Bonfanti
- Pediatrics and Neonatal Disease Unit, IRCCS San Raffaele Hospital, 20132, Milan, Italy
| | | | - Graziano Barera
- Pediatrics and Neonatal Disease Unit, IRCCS San Raffaele Hospital, 20132, Milan, Italy
| | - Giulia Martina Cavestro
- San Raffaele Vita Salute University, Via Olgettina 60, 20132, Milan, Italy
- Gastroenterology and Digestive Endoscopy Unit, IRCCS San Raffaele Hospital, 20132, Milan, Italy
| | - Valeria Sordi
- Diabetes Research Institute, IRCCS San Raffaele Hospital, 20132, Milan, Italy
| | - Emanuele Bosi
- Diabetes Research Institute, IRCCS San Raffaele Hospital, 20132, Milan, Italy.
- San Raffaele Vita Salute University, Via Olgettina 60, 20132, Milan, Italy.
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76
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Ansia I, Stein HH, Brøkner C, Drackley JK. Short communication: A pilot study to describe duodenal and ileal flows of nutrients and to estimate small intestine endogenous protein losses in weaned calves. J Dairy Sci 2020; 103:9102-9109. [PMID: 32773308 DOI: 10.3168/jds.2020-18281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 05/28/2020] [Indexed: 11/19/2022]
Abstract
The aims of this pilot study were (1) to evaluate the effect of an ileal and duodenal cannulation surgery on body weight and dry matter intake, (2) to estimate endogenous losses of crude protein (CP) and AA in the small intestine, and (3) to describe duodenal and ileal flows of nutrients in weaned dairy calves. Three Holstein male calves were fitted at 7 wk of life with a T-cannula at the terminal ileum and another cannula at the proximal duodenum. On wk 14 of life, calves were randomly assigned to a single 3 × 3 Latin square with 10-d periods. The 3 diets were fed ad libitum and consisted of a control calf starter (CS) with conventional soybean meal (SBM) as the main source of protein (CTRL), an isonitrogenous (20% CP) CS with an enzyme-treated SBM as the main source of protein (ENZT), and a CS with low content of CP (10%) and no soy protein (LOCP). Flows and digestibilities of nutrients were compared between the soy-based high-protein diets (HICP) and LOCP, and between CTRL and ENZT. Final data were only available from 2 calves per diet (n = 2) because cannulas from 1 calf became inoperative after the first collection period. Duodenal flows of CP, total AA, nonprotein nitrogen, microbial N, and fatty acids, as well as apparent duodenal digestibility of starch, were greater for HICP than for LOCP, indicating a greater foregut microbial activity and digestion. The apparent ileal digestibility (AID) of organic matter, CP, and total AA were greater for HICP than for LOCP. Duodenal net flow of CP was greater for ENZT than for CTRL, but flow of AA was not different. On the other hand, duodenal flow of microbial N was greater, and flows of nonprotein N and starch were lower for the ENZT diet, suggesting a more efficient microbial activity in the rumen. Even though CTRL had a greater AID when compared with ENZT, the AID of CP and AA were greater for enzyme-treated SBM than for SBM. Endogenous losses in the small intestine per kilogram of duodenal dry matter flow were 47 ± 15 and 37 ± 12 g/d, and the true ileal digestibilities for the HICP diets were 86 ± 0.1 and 87 ± 0.1% for CP and AA, respectively. An optimal supply of CP and the inclusion of an enzyme-treated SBM improved the efficiency of microbial digestion and increased AA absorption. Although further research with greater biological replication is needed, our results indicate that there is potential to improve digestion and absorption of proteins through dietary strategies in young weaned calves.
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Affiliation(s)
- I Ansia
- Department of Animal Sciences, University of Illinois, Urbana 61801
| | - H H Stein
- Department of Animal Sciences, University of Illinois, Urbana 61801
| | - C Brøkner
- Hamlet Protein A/S, Horsens, Denmark 8700
| | - J K Drackley
- Department of Animal Sciences, University of Illinois, Urbana 61801.
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Kang C, Wang L, Feng J, Zhu W, Hang S. l-Glutamate stimulates cholecystokinin secretion via the T1R1/T1R3 mediated PLC/TRPM5 transduction pathway. J Sci Food Agric 2020; 100:4818-4825. [PMID: 32478409 DOI: 10.1002/jsfa.10541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 05/17/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND It is known that cholecystokinin (CCK) plays an essential role in reducing food intake and driving weight loss. Previous studies demonstrated that amino acids were capable of triggering CCK release through G protein-coupled receptors, but the sensing mechanism remains obscure, especially the intracellular signaling pathway. RESULTS l-Glu, rather than its d-isomer, robustly stimulated CCK secretion in a porcine duodenal model, and the secretory response was augmented by incubation with the allosteric ligand of T1R1, while T1R3 antagonist attenuated it. Upon inhibiting phospholipase C (PLC) or transient receptor potential M5 (TRPM5) activity, l-Glu failed to increase CCK release. Oral administration of monosodium glutamate in rats also suppressed food intake and increased plasma CCK levels, accompanied by elevated expression of T1R1, PLCβ2 and TRPM5 in the duodenum. CONCLUSION These data demonstrated that l-Glu stimulated CCK secretion through the activation of T1R1/T1R3 in a PLC/TRPM5-dependent manner. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Cuicui Kang
- National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing, China
- Laboratory of Gastrointestinal Microbiology, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Lvyang Wang
- National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing, China
- Laboratory of Gastrointestinal Microbiology, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Jiangyin Feng
- National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing, China
- Laboratory of Gastrointestinal Microbiology, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Weiyun Zhu
- National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing, China
- Laboratory of Gastrointestinal Microbiology, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Suqin Hang
- National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing, China
- Laboratory of Gastrointestinal Microbiology, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
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78
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Ho-Plagaro A, Santiago-Fernandez C, Rodríguez-Díaz C, Lopez-Gómez C, Garcia-Serrano S, Rodríguez-Pacheco F, Valdes S, Rodríguez-Cañete A, Alcaín-Martínez G, Ruiz-Santana N, Vázquez-Pedreño L, García-Fuentes E. Different Expression of Duodenal Genes Related to Insulin Resistance Between Nonobese Women and Those with Severe Obesity. Obesity (Silver Spring) 2020; 28:1708-1717. [PMID: 32729246 DOI: 10.1002/oby.22902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 04/14/2020] [Accepted: 05/07/2020] [Indexed: 12/26/2022]
Abstract
OBJECTIVE The study aim was to identify changes in duodenal gene expression associated with the development of insulin resistance according to the BMI of women. METHODS Duodenal samples were assessed by microarray in four groups of women, nonobese women and women with severe obesity, with both low and high insulin resistance. RESULTS There was a group of shared downregulated differentially expressed genes (DEGs) related to tissue homeostasis and antimicrobial humoral response in women with higher insulin resistance both with severe obesity and without obesity. In the exclusive DEGs found in severe obesity, downregulated DEGs related to the regulation of the defense response to bacterium and cell adhesion, involving pathways related to the immune system, inflammation, and xenobiotic metabolism, were observed. In the exclusive DEGs from nonobese women with higher insulin resistance, upregulated DEGs mainly related to the regulation of lipoprotein lipase activity, very low-density lipoprotein particle remodeling, lipid metabolic process, antigen processing, and the presentation of peptide antigen were found. CONCLUSIONS Independent of BMI, higher insulin resistance was associated with a downregulation of duodenal DEGs mainly related to the immune system, inflammation, and xenobiotic metabolism. Also, intestinal lipoprotein metabolism may have a certain relevance in the regulation of insulin resistance in nonobese women.
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Affiliation(s)
- Ailec Ho-Plagaro
- Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain
- Unidad de Gestión Clínica de Aparato Digestivo, Hospital Universitario Virgen de la Victoria, Málaga, Spain
- Departamento de Biología Celular, Genética y Fisiología, Universidad de Málaga, Málaga, Spain
| | - Concepción Santiago-Fernandez
- Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain
- Unidad de Gestión Clínica de Aparato Digestivo, Hospital Universitario Virgen de la Victoria, Málaga, Spain
- Departamento de Medicina y Dermatología, Universidad de Málaga, Málaga, Spain
| | - Cristina Rodríguez-Díaz
- Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain
- Unidad de Gestión Clínica de Aparato Digestivo, Hospital Universitario Virgen de la Victoria, Málaga, Spain
| | - Carlos Lopez-Gómez
- Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain
- Unidad de Gestión Clínica de Aparato Digestivo, Hospital Universitario Virgen de la Victoria, Málaga, Spain
| | - Sara Garcia-Serrano
- Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain
- Unidad de Gestión Clínica de Endocrinología y Nutrición, Hospital Regional Universitario de Málaga, Málaga, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas-CIBERDEM, Málaga, Spain
| | - Francisca Rodríguez-Pacheco
- Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain
- Unidad de Gestión Clínica de Aparato Digestivo, Hospital Universitario Virgen de la Victoria, Málaga, Spain
| | - Sergio Valdes
- Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain
- Unidad de Gestión Clínica de Endocrinología y Nutrición, Hospital Regional Universitario de Málaga, Málaga, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas-CIBERDEM, Málaga, Spain
| | - Alberto Rodríguez-Cañete
- Unidad de Gestión Clínica de Cirugía General, Digestiva y Trasplantes, Hospital Regional Universitario de Málaga, Málaga, Spain
| | - Guillermo Alcaín-Martínez
- Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain
- Unidad de Gestión Clínica de Aparato Digestivo, Hospital Universitario Virgen de la Victoria, Málaga, Spain
| | - Natalia Ruiz-Santana
- Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain
- Unidad de Gestión Clínica de Aparato Digestivo, Hospital Universitario Virgen de la Victoria, Málaga, Spain
| | - Luis Vázquez-Pedreño
- Unidad de Gestión Clínica de Aparato Digestivo, Hospital Regional Universitario de Málaga, Málaga, Spain
| | - Eduardo García-Fuentes
- Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain
- Unidad de Gestión Clínica de Aparato Digestivo, Hospital Universitario Virgen de la Victoria, Málaga, Spain
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Han SI, Lee SW, Cho MG, Yoo JM, Oh MH, Jeong B, Kim D, Park OK, Kim J, Namkoong E, Jo J, Lee N, Lim C, Soh M, Sung YE, Yoo J, Park K, Hyeon T. Epitaxially Strained CeO 2 /Mn 3 O 4 Nanocrystals as an Enhanced Antioxidant for Radioprotection. Adv Mater 2020; 32:e2001566. [PMID: 32520432 DOI: 10.1002/adma.202001566] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 05/08/2020] [Indexed: 05/26/2023]
Abstract
Nanomaterials with antioxidant properties are promising for treating reactive oxygen species (ROS)-related diseases. However, maintaining efficacy at low doses to minimize toxicity is a critical for clinical applications. Tuning the surface strain of metallic nanoparticles can enhance catalytic reactivity, which has rarely been demonstrated in metal oxide nanomaterials. Here, it is shown that inducing surface strains of CeO2 /Mn3 O4 nanocrystals produces highly catalytic antioxidants that can protect tissue-resident stem cells from irradiation-induced ROS damage. Manganese ions deposited on the surface of cerium oxide (CeO2 ) nanocrystals form strained layers of manganese oxide (Mn3 O4 ) islands, increasing the number of oxygen vacancies. CeO2 /Mn3 O4 nanocrystals show better catalytic activity than CeO2 or Mn3 O4 alone and can protect the regenerative capabilities of intestinal stem cells in an organoid model after a lethal dose of irradiation. A small amount of the nanocrystals prevents acute radiation syndrome and increases the survival rate of mice treated with a lethal dose of total body irradiation.
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Affiliation(s)
- Sang Ihn Han
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sang-Woo Lee
- Department of Physiology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, 03080, Republic of Korea
| | - Min Gee Cho
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Ji Mun Yoo
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Myoung Hwan Oh
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Beomgyun Jeong
- Advanced Nano Surface Research Group, Korea Basic Science Institute, Daejeon, 34133, Republic of Korea
| | - Dokyoon Kim
- Department of Bionano Engineering and Bionanotechnology, Hanyang University, Ansan, 15588, Republic of Korea
| | - Ok Kyu Park
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Junchul Kim
- Department of Physiology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, 03080, Republic of Korea
| | - Eun Namkoong
- Department of Physiology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, 03080, Republic of Korea
| | - Jinwoung Jo
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Nohyun Lee
- School of Advanced Materials Engineering, Kookmin University, Seoul, 136-702, Republic of Korea
| | - Chaehong Lim
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Min Soh
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Yung-Eun Sung
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jongman Yoo
- Department of Microbiology, School of Medicine, CHA University, Sungnam, 13488, Republic of Korea
| | - Kyungpyo Park
- Department of Physiology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, 03080, Republic of Korea
| | - Taeghwan Hyeon
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
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Simpson RE, Yip-Schneider M, Flick KF, Soufi M, Ceppa EP, Al-Haddad MA, Easler JJ, Sherman S, Dewitt JM, Schmidt CM. Secretin-induced Duodenal Aspirate of Pancreatic Juice (SIDA): Utility of Commercial Genetic Analysis. Anticancer Res 2020; 40:4215-4221. [PMID: 32727747 DOI: 10.21873/anticanres.14422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 06/26/2020] [Accepted: 06/29/2020] [Indexed: 11/10/2022]
Abstract
BACKGROUND Secretin-induced duodenal aspiration (SIDA) of pancreatic duct fluid has been proposed for pancreatic neoplasm screening in very high-risk patients. We sought to determine the clinical yield and safety of commercially-analyzed SIDA samples in patients at moderately elevated risk. PATIENTS AND METHODS A prospectively maintained institutional database of pancreatic fluid DNA profiles was retrospectively reviewed. RESULTS Fifty-seven patients underwent SIDA testing, most commonly for intraductal papillary mucinous neoplasms (n=43) and not otherwise specified solitary cysts (n=9). SIDA mutation yield was low compared to 37 concomitant endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) samples of pancreatic fluid: KRAS (2.5% vs. 40.0%), GNAS (2.6% vs. 11.1%) and allelic loss of heterozygosity (3.1% vs. 0%). Patients undergoing SIDA alone experienced no complications while 3 patients with concomitant EUS-FNA had post-procedural pancreatitis. CONCLUSION The genetic yield of commercially-analyzed SIDA samples was relatively low in a moderately elevated risk cohort. SIDA testing may have a better safety profile than EUS-FNA.
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Affiliation(s)
- Rachel E Simpson
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, U.S.A
| | - Michele Yip-Schneider
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, U.S.A
- Indiana University Health Pancreatic Cyst and Cancer Early Detection Center, Indianapolis, IN, U.S.A
| | - Katelyn F Flick
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, U.S.A
| | - Mazhar Soufi
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, U.S.A
| | - Eugene P Ceppa
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, U.S.A
- Indiana University Health Pancreatic Cyst and Cancer Early Detection Center, Indianapolis, IN, U.S.A
| | - Mohammad A Al-Haddad
- Indiana University Health Pancreatic Cyst and Cancer Early Detection Center, Indianapolis, IN, U.S.A
- Department of Medicine, Division of Gastroenterology, Indiana University School of Medicine, Indianapolis, IN, U.S.A
| | - Jeffrey J Easler
- Department of Medicine, Division of Gastroenterology, Indiana University School of Medicine, Indianapolis, IN, U.S.A
| | - Stuart Sherman
- Department of Medicine, Division of Gastroenterology, Indiana University School of Medicine, Indianapolis, IN, U.S.A
| | - John M Dewitt
- Department of Medicine, Division of Gastroenterology, Indiana University School of Medicine, Indianapolis, IN, U.S.A
| | - C Max Schmidt
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, U.S.A.
- Indiana University Health Pancreatic Cyst and Cancer Early Detection Center, Indianapolis, IN, U.S.A
- Department of Biochemistry/Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, U.S.A
- Walther Oncology Center, Indianapolis, IN, U.S.A
- Indiana University Simon Cancer Center, Indianapolis, IN, U.S.A
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Abo Ghanima MM, Abd El-Aziz AH, Noreldin AE, Atta MS, Mousa SA, El-Far AH. β-glucan administration improves growth performance and gut health in New Zealand White and APRI rabbits with different breed responses. PLoS One 2020; 15:e0234076. [PMID: 32520965 PMCID: PMC7286524 DOI: 10.1371/journal.pone.0234076] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Accepted: 05/18/2020] [Indexed: 12/16/2022] Open
Abstract
This study investigated the effects of oral administration of β-glucan 1,3 (pharmaceutical grade 10%) on growth performance and carcass traits in two breeds of weanling rabbits adapted to survive in Egypt, New Zealand White (NZW) and Animal Production Research Institute (APRI) rabbits, with special attention to relative mRNA expression of interleukins and antioxidant enzyme genes, biochemical, and histological alterations. Oral administration of β-glucan with doses 0.25 and 0.5 ml per one-liter of drinking water significantly accelerated body weight gain (BWG) in both rabbits’ breeds, reduced total feed consumption (FC), and reduced feed conversion ratio (FCR), especially the 0.5 ml per one-liter dose in both rabbit breeds. There are remarkable differences in all the growth performance traits due to breed effect. The interaction effect between β-glucan and breed significantly improved BWG, FC, and FCR. There were non-significant differences in all carcass traits studied due to oral administration of β-glucan with both doses, except in dressing percentages. The highest of the dressing percentages were observed at doses 0.25 ml per one-liter (51%) and 0.5 ml per one-liter (52%) compared with control (50%). Our findings show significant variations in the final BW, total daily gain, feed consumption, and total feed conversion ratio between NZW and APRI rabbits. Absence of significant differences in the hot carcass weight and dressing percentage between the genetic groups had been reported in this study. Supplementing NZW and APRI rabbits with β-glucan increased blood total protein and globulin. The duodenal villi dimensions, splenic lymphoid diameter, muscular fiber diameter, and muscular glycogen areas were significantly increased by β-glucan administration. Expression of intestinal interleukin-18 (IL-18) in NZW rabbits treated with 0.25 and 0.5 doses of β-glucan was significantly upregulated and enhanced the immune response. β-glucan upregulated the expression of intestinal occludin mRNA particularly at dose 0.5 β-glucan as well as upregulated intestinal superoxide dismutase 1 (SOD1) and glutathione peroxidase 1 (GPx1), which modulates anti-inflammatory and antioxidant properties. In conclusion, oral administration of β-glucan at a dose of 0.25 or 0.5 ml per one-liter drinking water provided beneficial effects in the growth performance and health status of rabbits.
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Affiliation(s)
- Mahmoud M. Abo Ghanima
- Department of Animal Husbandry and Animal Wealth Development, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt
| | - Ayman H. Abd El-Aziz
- Department of Animal Husbandry and Animal Wealth Development, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt
| | - Ahmed E. Noreldin
- Department of Histology and Cytology, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt
| | - Mustafa S. Atta
- Department of Physiology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh, Egypt
| | - Shaker A. Mousa
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, NY, United States of America
| | - Ali H. El-Far
- Department of Biochemistry, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt
- * E-mail:
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Suksridechacin N, Kulwong P, Chamniansawat S, Thongon N. Effect of prolonged omeprazole administration on segmental intestinal Mg 2+ absorption in male Sprague-Dawley rats. World J Gastroenterol 2020; 26:1142-1155. [PMID: 32231419 PMCID: PMC7093313 DOI: 10.3748/wjg.v26.i11.1142] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/06/2020] [Accepted: 03/05/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The exact mechanism of proton pump inhibitors (PPIs)-induced hypomagnesemia (PPIH) is largely unknown. Previous studies proposed that PPIH is a consequence of intestinal Mg2+ malabsorption. However, the mechanism of PPIs-suppressed intestinal Mg2+ absorption is under debate.
AIM To investigate the effect of 12-wk and 24-wk omeprazole injection on the total, transcellular, and paracellular Mg2+ absorption in the duodenum, jejunum, ileum, and colon of male Sprague-Dawley rats.
METHODS The rats received 20 mg/kg∙d subcutaneous omeprazole injection for 12 or 24 wk. Plasma and urinary Mg2+, Ca2+, and PO43− levels were measured. The plasma concentrations of 1α,25-dihydroxyvitamin D3 (1α,25(OH)2D3), parathyroid hormone (PTH), fibroblast growth factor 23 (FGF-23), epidermal growth factor (EGF), and insulin were also observed. The duodenum, jejunum, ileum, and colon of each rat were mounted onto individual modified Using chamber setups to study the rates of total, transcellular, and paracellular Mg2+ absorption simultaneously. The expression of transient receptor potential melastatin 6 (TRPM6) and cyclin M4 (CNNM4) in the entire intestinal tract was also measured.
RESULTS Single-dose omeprazole injection significantly increased the intraluminal pH of the stomach, duodenum, and jejunum. Omeprazole injection for 12 and 24 wk induced hypomagnesemia with reduced urinary Mg2+ excretion. The plasma Ca2+ was normal but the urinary Ca2+ excretion was reduced in rats with PPIH. The plasma and urinary PO43− levels increased in PPIH rats. The levels of 1α,25(OH)2D3 and FGF-23 increased, whereas that of plasma EGF decreased in the omeprazole-treated rats. The rates of the total, transcellular, and paracellular Mg2+ absorption was significantly lower in the duodenum, jejunum, ileum, and colon of the rats with PPIH than in those of the control rats. The percent suppression of Mg2+ absorption in the duodenum, jejunum, ileum, and colon of the rats with PPIH compared with the control rats was 81.86%, 70.59%, 69.45%, and 39.25%, respectively. Compared with the control rats, the rats with PPIH had significantly higher TRPM6 and CNNM4 expression levels throughout the intestinal tract.
CONCLUSION Intestinal Mg2+ malabsorption was observed throughout the intestinal tract of rats with PPIH. PPIs mainly suppressed small intestinal Mg2+ absorption. Omeprazole exerted no effect on the intraluminal acidic pH in the colon. Thus, the lowest percent suppression of total Mg2+ absorption was found in the colon. The expression levels of TRPM6 and CNNM4 increased, indicating the presence of a compensatory response to Mg2+ malabsorption in rats with PPIH. Therefore, the small intestine is an appropriate segment that should be modulated to counteract PPIH.
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Affiliation(s)
- Nasisorn Suksridechacin
- Division of Physiology, Department of Biomedical Sciences, Faculty of Allied Health Sciences, Burapha University, Chonburi 20131, Thailand
| | - Punnisa Kulwong
- Division of Physiology, Department of Biomedical Sciences, Faculty of Allied Health Sciences, Burapha University, Chonburi 20131, Thailand
| | - Siriporn Chamniansawat
- Division of Anatomy, Department of Biomedical Sciences, Faculty of Allied Health Sciences, Burapha University, Chonburi 20131, Thailand
| | - Narongrit Thongon
- Division of Physiology, Department of Biomedical Sciences, Faculty of Allied Health Sciences, Burapha University, Chonburi 20131, Thailand
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González J, Díaz-Royón F, Vanegas JL, Arroyo JM, Carro MD. Ruminal use of undegraded-feed soluble protein and accuracy of the estimations of the nutrient content in ruminal bacteria. J Sci Food Agric 2020; 100:1608-1615. [PMID: 31773732 DOI: 10.1002/jsfa.10169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 10/21/2019] [Accepted: 11/21/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND The possible escape from the rumen of undegraded-feed soluble proteins (SP) was investigated using nitrogen-15 (15 N) infusions (25 mg) in three rumen and duodenum cannulated wethers. Animals were fed three isoproteic diets differing in SP content and including protein concentrates either untreated (control) or treated with solutions of either malic acid (MHT) or orthophosphoric acid (OHT) and heat. RESULTS Compared with control, MHT and OHT diets reduced ruminal concentrations of ammonia-nitrogen (NH3 -N) by 35.9% (P = 0.007), non-ammonia nitrogen (NAN) by 36.8% (P = 0.007), and SP-nitrogen (SP-N) by 45.2% (P = 0.072) over the post-feeding period. Both NAN and SP-N were lower (P ≤ 0.040) for OHT than for MHT diet. The 15 N enrichment of NAN and SP-N did not vary either among diets or with time, and both values were closely related (R2 = 0.965; P < 0.001). Estimations, either using solid-associated bacteria (SAB) or liquid-associated bacteria (LAB) as a reference, indicated that 0.983 and 0.894 of SP-N (values averaged across diets) was of microbial origin, respectively, which would indicate a practically negligible ruminal escape of feed SP-N. Values of 15 N-enrichment in SAB and LAB fitted well to previously published SAB-LAB relationships, indicating a 22% underevaluation of the N supply from SAB when only LAB is used as a reference. CONCLUSION Both the negligible ruminal escape of feed SP and the underevaluation of the bacterial nutrient supply as a consequence of the use of LAB as the only bacterial reference should be considered to improve ruminant protein feeding systems. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Javier González
- Departamento de Producción Agraria, Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain
| | - Fernando Díaz-Royón
- Departamento de Producción Agraria, Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain
| | - Jorge L Vanegas
- Departamento de Producción Agraria, Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain
| | - José M Arroyo
- Departamento de Producción Agraria, Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain
| | - María D Carro
- Departamento de Producción Agraria, Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain
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Varghese J, Varghese James J, Karthikeyan M, Rasalkar K, Raghavan R, Sukumaran A, Premkumar PS, Eapen CE, Jacob M. Iron homeostasis is dysregulated, but the iron-hepcidin axis is functional, in chronic liver disease. J Trace Elem Med Biol 2020; 58:126442. [PMID: 31835128 DOI: 10.1016/j.jtemb.2019.126442] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 11/17/2019] [Accepted: 11/25/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Perturbations in iron homeostasis have been reported to be associated with irreversible liver injury in chronic liver disease (CLD). However, it is not clear whether liver dysfunction per se underlies such dysregulation or whether other factors also contribute to it. This study attempted to examine the issues involved. METHODS Patients diagnosed to have chronic liver disease (n = 63), who underwent a medically-indicated upper gastrointestinal endoscopy, were the subjects of this study. Patients with dyspepsia, who underwent such a procedure, and were found to have no endoscopic abnormalities, were used as control subjects (n = 49). Duodenal mucosal samples were obtained to study mRNA and protein levels of duodenal proteins involved in iron absorption. A blood sample was also obtained for estimation of hematological, iron-related, inflammatory and liver function-related parameters. RESULTS Patients with CLD had impaired liver function, anemia of inflammation and lower serum levels of hepcidin than control subjects. Gene (mRNA) expression levels of duodenal ferroportin and duodenal cytochrome b (proteins involved in iron absorption) were decreased, while that of divalent metal transporter-1 (DMT-1) was unchanged. Protein expression of DMT-1 was, however, decreased while that of ferroportin was unchanged. In the CLD group, serum hepcidin was predicted independently by serum ferritin and hemoglobin, but not by C-reactive protein (a marker of inflammation). CLD patients with serum ferritin greater than 300 μg/dL had significantly greater liver dysfunction (as indicated by significantly higher serum concentrations of bilirubin, AST and ALT, and MELD scores), higher serum concentrations of CRP and hepcidin, and higher ferroportin protein expression, than those with serum ferritin ≤ 300 μg/dL. CONCLUSIONS In patients with CLD, anemia of inflammation and low serum hepcidin levels were found to paradoxically co-exist. Expression of duodenal proteins involved in iron absorption were either decreased or unaltered in these patients. The hepcidin response to higher body iron levels and/or inflammation appeared to be functional in these patients, despite the presence of liver disease.
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Affiliation(s)
- Joe Varghese
- Department of Biochemistry, Christian Medical College, Vellore, 632002, India
| | | | | | - Kavita Rasalkar
- Department of Biochemistry, Christian Medical College, Vellore, 632002, India
| | - Ramya Raghavan
- Department of Biochemistry, Christian Medical College, Vellore, 632002, India
| | - Abitha Sukumaran
- Department of Biochemistry, Christian Medical College, Vellore, 632002, India
| | - Prasanna S Premkumar
- Department of Biostatistics, Christian Medical College, Vellore, 632002, India; Wellcome Trust Research Laboratory, Christian Medical College, Vellore, 632002, India
| | - C E Eapen
- Department of Gastroenterology and Hepatology, Christian Medical College, Vellore, 632002, India
| | - Molly Jacob
- Department of Biochemistry, Christian Medical College, Vellore, 632002, India.
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Abstract
Clinical interest into the function of tuft cells in human intestine has increased in recent years. However, no quantitative study has examined intestinal tuft cells in pathological specimens from patients. This study quantified tuft cell density by using a recently identified marker, specific for tyrosine phosphorylation (pY1798) of girdin (also known as CCDC88A or GIV) in the duodenum of pediatric patients. Deidentified sections with pathological diagnosis of acute duodenitis, ulcer, or celiac disease, and age-matched normal control were analyzed under double-blind conditions. Immunostaining for pY1798-girdin demonstrated the distinct shape of tuft cells with and filopodia-like basolateral membrane structure and a small apical area, which densely expressed gamma-actin. As compared to normal tissues, the specimens diagnosed as celiac disease and duodenal ulcer had significantly fewer tuft cell numbers. In contrast, acute duodenitis showed varied population of tuft cells. The mucosa with severe inflammation showed lower tuft cell numbers than the specimens with none to mild inflammation. These results suggest that loss of tuft cells may be involved in prolonged inflammation in the duodenal mucosa and disrupted mucosal integrity. pY1798-girdin and gamma-actin are useful markers for investigating the distribution and morphologies of human intestinal tuft cells under healthy and pathological conditions.
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Affiliation(s)
- Won Jae Huh
- Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Joseph TE Roland
- Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, TN, USA
- Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Masato Asai
- Institute for Developmental Research, Aichi Developmental Disability Center, Kasugai, Japan
| | - Izumi Kaji
- Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, TN, USA
- Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
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Palus K, Całka J. Influence of Acrylamide Administration on the Neurochemical Characteristics of Enteric Nervous System (ENS) Neurons in the Porcine Duodenum. Int J Mol Sci 2019; 21:ijms21010015. [PMID: 31861419 PMCID: PMC6982244 DOI: 10.3390/ijms21010015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 12/13/2019] [Accepted: 12/15/2019] [Indexed: 12/23/2022] Open
Abstract
The digestive tract, especially the small intestine, is one of the main routes of acrylamide absorption and is therefore highly exposed to the toxic effect of acrylamide contained in food. The aim of this experiment was to elucidate the effect of low (tolerable daily intake—TDI) and high (ten times higher than TDI) doses of acrylamide on the neurochemical phenotype of duodenal enteric nervous system (ENS) neurons using the pig as an animal model. The experiment was performed on 15 immature gilts of the Danish Landrace assigned to three experimental groups: control (C) group—pigs administered empty gelatine capsules, low dose (LD) group—pigs administered capsules with acrylamide at the TDI dose (0.5 μg/kg body weight (b.w.)/day), and the high dose (HD) group—pigs administered capsules with acrylamide at a ten times higher dose than the TDI (5 μg/kg b.w./day) with a morning feeding for 4 weeks. Administration of acrylamide, even in a low (TDI) dose, led to an increase in the percentage of enteric neurons immunoreactive to substance P (SP), calcitonin gene-related peptide (CGRP), galanin (GAL), neuronal nitric oxide synthase (nNOS), and vesicular acetylcholine transporter (VACHT) in the porcine duodenum. The severity of the changes clearly depended on the dose of acrylamide and the examined plexus. The obtained results suggest the participation of these neuroactive substances in acrylamide-inducted plasticity and the protection of ENS neurons, which may be an important line of defence from the harmful action of acrylamide.
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Kawamoto K, Sakuma M, Tanaka S, Masuda M, Nakao-Muraoka M, Niida Y, Nakamatsu Y, Ito M, Taketani Y, Arai H. High-fat diets provoke phosphorus absorption from the small intestine in rats. Nutrition 2019; 72:110694. [PMID: 32007805 DOI: 10.1016/j.nut.2019.110694] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 10/31/2019] [Accepted: 11/08/2019] [Indexed: 01/26/2023]
Abstract
OBJECTIVE The ratio of dietary carbohydrate to fat may affect phosphorus metabolism because both calcium and phosphorus are regulated by similar metabolic mechanisms, and a high-fat diet (HFD) induces deleterious effects on the absorption of dietary calcium. We hypothesized that an HFD induces an increase in phosphorus absorption. The aim of this study was to evaluate the effects of differences in the quantity and quality of dietary fat on phosphorus metabolism over the short- and long-term. METHODS Eighteen 8-wk-old Sprague-Dawley male rats were fed an isocaloric diet containing varied ratios of carbohydrates to fat energy and sources of fat (control diet, HFD, and high- saturated fat diet [HF-SFA]). At 3 d and 7 wk after the allocation and initiation of the test diets, feces and urine were collected and used for phosphorus and calcium measurement. RESULTS The fecal phosphorous concentration (F-Pi) was lower in the HF-SFA group than in the other two groups; however, the urine phosphorus concentration (U-Pi) was significantly higher in the HF-SFA group than the other two groups when the rats were fed over the short- (P < 0.01) and long -term (P < 0.01 versus control, P < 0.05 versus HFD group). There were no significant differences in type-IIa sodium-phosphate cotransporter (NaPi-2 a) and type-IIc sodium-phosphate cotransporter (NaPi-2 c) mRNA expression, which are renal phosphate transport-related genes; however, the expression of type-IIb sodium-phosphate cotransporter (NaPi-2 b) and type-III sodium-phosphate cotransporter (Pit-1) mRNA in the duodenum was higher in the HFD and HF-SFA groups than in the control group (P < 0.05), although there were no significant differences in these in the jejunum. CONCLUSIONS The present results indicated that an HFD, particularly HF-SFA, increases intestinal phosphate absorption compared with control.
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Affiliation(s)
- Keisuke Kawamoto
- Laboratory of Clinical Nutrition and Management, Graduate School of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan
| | - Masae Sakuma
- Laboratory of Clinical Nutrition and Management, Graduate School of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan; Department of Human and Nutrition, School of Life Studies, Sugiyama Jogakuen University, Nagoya, Japan.
| | - Sarasa Tanaka
- School of Human Science and Environment, University of Hyogo, Himeji, Japan
| | - Masashi Masuda
- Department of Clinical Nutrition and Food Management, Institute of Biomedical Sciences, University of Tokushima, Tokushima, Japan
| | - Mari Nakao-Muraoka
- Department of Clinical Nutrition and Food Management, Institute of Biomedical Sciences, University of Tokushima, Tokushima, Japan
| | - Yuki Niida
- Department of Clinical Nutrition and Food Management, Institute of Biomedical Sciences, University of Tokushima, Tokushima, Japan
| | - Yurino Nakamatsu
- Laboratory of Clinical Nutrition and Management, Graduate School of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan
| | - Mikiko Ito
- School of Human Science and Environment, University of Hyogo, Himeji, Japan
| | - Yutaka Taketani
- Department of Clinical Nutrition and Food Management, Institute of Biomedical Sciences, University of Tokushima, Tokushima, Japan
| | - Hidekazu Arai
- Laboratory of Clinical Nutrition and Management, Graduate School of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan
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Graves JP, Bradbury JA, Gruzdev A, Li H, Duval C, Lih FB, Edin ML, Zeldin DC. Expression of Cyp2c/ Cyp2j subfamily members and oxylipin levels during LPS-induced inflammation and resolution in mice. FASEB J 2019; 33:14784-14797. [PMID: 31690125 PMCID: PMC6894073 DOI: 10.1096/fj.201901872r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 09/30/2019] [Indexed: 01/08/2023]
Abstract
Inflammatory stimuli, such as bacterial LPS, alter the expression of many cytochromes P450. CYP2C and CYP2J subfamily members actively metabolize fatty acids to bioactive eicosanoids, which exhibit potent anti-inflammatory effects. Herein, we examined mRNA levels of the 15 mouse Cyp2c and 7 mouse Cyp2j isoforms in liver, kidney, duodenum, and brain over a 96-h time course of LPS-induced inflammation and resolution. Plasma and liver eicosanoid levels were also measured by liquid chromatography with tandem mass spectrometry. Expression changes in Cyp2c and Cyp2j isoforms were both isoform and tissue specific. Total liver Cyp2c and Cyp2j mRNA content was reduced by 80% 24 h after LPS but recovered to baseline levels by 96 h. Total Cyp2c and Cyp2j mRNA in kidney (-19%) and duodenum (-64%) were reduced 24 h after LPS but recovered above baseline by 72 h. Total Cyp2c and Cyp2j mRNA content in brain was elevated at all time points after LPS dosing. Plasma eicosanoids transiently increased 3-6 h after administration of LPS. In liver, esterified oxylipin levels decreased during acute inflammation and before recovering. The biphasic suppression and recovery of mouse Cyp2c and Cyp2j isoforms and associated changes in eicosanoid levels during LPS-induced inflammation and resolution may have important physiologic consequences.-Graves, J. P., Bradbury, J. A., Gruzdev, A., Li, H., Duval, C., Lih, F. B., Edin, M. L., Zeldin, D. C. Expression of Cyp2c/Cyp2j subfamily members and oxylipin levels during LPS-induced inflammation and resolution in mice.
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Affiliation(s)
- Joan P. Graves
- Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
| | - J. Alyce Bradbury
- Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
| | - Artiom Gruzdev
- Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
| | - Hong Li
- Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
| | - Caroline Duval
- Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
| | - Fred B. Lih
- Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
| | - Matthew L. Edin
- Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
| | - Darryl C. Zeldin
- Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
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McVeay C, Fitzgerald PCE, Horowitz M, Feinle-Bisset C. Effects of Duodenal Infusion of Lauric Acid and L-Tryptophan, Alone and Combined, on Fasting Glucose, Insulin and Glucagon in Healthy Men. Nutrients 2019; 11:nu11112697. [PMID: 31703434 PMCID: PMC6893799 DOI: 10.3390/nu11112697] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 11/05/2019] [Accepted: 11/06/2019] [Indexed: 02/07/2023] Open
Abstract
The fatty acid, lauric acid ('C12'), and the amino acid, tryptophan ('Trp'), when given intraduodenally at loads that individually do not affect energy intake, have recently been shown to stimulate plasma cholecystokinin, suppress ghrelin and reduce energy intake much more markedly when combined. Both fatty acids and amino acids stimulate insulin secretion by distinct mechanisms; fatty acids enhance glucose-stimulated insulin secretion, while amino acids may have a direct effect on pancreatic β cells. Therefore, it is possible that, by combining these nutrients, their effects to lower blood glucose may be enhanced. We have investigated the potential for the combination of C12 and Trp to have additive effects to reduce blood glucose. To address this question, plasma concentrations of glucose, insulin and glucagon were measured in 16 healthy, lean males during duodenal infusions of saline (control), C12 (0.3 kcal/min), Trp (0.1 kcal/min), or C12+Trp (0.4 kcal/min), for 90 min. Both C12 and C12+Trp moderately reduced plasma glucose compared with control (p < 0.05). C12+Trp, but not C12 or Trp, stimulated insulin and increased the insulin-to-glucose ratio (p < 0.05). There was no effect on plasma glucagon. In conclusion, combined intraduodenal administration of C12 and Trp reduced fasting glucose in healthy men, and this decrease was driven primarily by C12. The effects of these nutrients on postprandial blood glucose and elevated fasting blood glucose in type 2 diabetes warrant evaluation.
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Komori K, Ihara E, Minoda Y, Ogino H, Sasaki T, Fujiwara M, Oda Y, Ogawa Y. The Altered Mucosal Barrier Function in the Duodenum Plays a Role in the Pathogenesis of Functional Dyspepsia. Dig Dis Sci 2019; 64:3228-3239. [PMID: 30673985 DOI: 10.1007/s10620-019-5470-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 01/16/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND An altered gastrointestinal barrier function is reportedly associated with the pathogenesis of functional dyspepsia (FD); however, the pathogenesis of FD has not yet been fully elucidated. AIMS The objective of the present study was to determine whether the mucosal barrier function is impaired in patients with FD and to investigate the mechanisms underlying FD. METHODS The present study included patients with FD (FD group, n = 24), non-FD patients with abdominal symptoms (symptomatic control group, n = 14), and patients with no abdominal symptoms (asymptomatic control group, n = 20). The groups were compared regarding the mucosal electrical impedance (MI) values of the stomach and duodenum, which were measured using a tissue conductance meter during esophagogastroduodenoscopy. RESULTS There were no significant differences between the three groups in the MI of the stomach. In contrast, the duodenal MI of the FD group (17.8 ± 4.3 Ω) was significantly lower than those of the symptomatic control group (27.2 ± 6.4 Ω, p < 0.0001) and asymptomatic control group (23.0 ± 7.4 Ω, p = 0.016). The expression of zonula occludens-1 (ZO-1) was significantly lower in the FD group than in the symptomatic control group (p = 0.011), where ZO-1 was positively correlated with the duodenal MI (β = 0.513, p = 0.017). The interleukin (IL)-1β expression was significantly higher in the FD group than in the symptomatic control group (p = 0.041), where IL-1β was inversely correlated with the duodenal MI (β = - 0.600, p = 0.004). CONCLUSIONS The mucosal barrier function of the duodenum was altered in patients with FD. Both a decreased ZO-1 and increased IL-1β may play a role in the pathogenesis of FD.
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Affiliation(s)
- Keishi Komori
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maedashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Eikichi Ihara
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maedashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Yosuke Minoda
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maedashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Haruei Ogino
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maedashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Taisuke Sasaki
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maedashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Minako Fujiwara
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maedashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yoshinao Oda
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maedashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yoshihiro Ogawa
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maedashi, Higashi-ku, Fukuoka, 812-8582, Japan
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Tomasetti C, Poling J, Roberts NJ, London NR, Pittman ME, Haffner MC, Rizzo A, Baras A, Karim B, Kim A, Heaphy CM, Meeker AK, Hruban RH, Iacobuzio-Donahue CA, Vogelstein B. Cell division rates decrease with age, providing a potential explanation for the age-dependent deceleration in cancer incidence. Proc Natl Acad Sci U S A 2019; 116:20482-20488. [PMID: 31548407 PMCID: PMC6789572 DOI: 10.1073/pnas.1905722116] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A new evaluation of previously published data suggested to us that the accumulation of mutations might slow, rather than increase, as individuals age. To explain this unexpected finding, we hypothesized that normal stem cell division rates might decrease as we age. To test this hypothesis, we evaluated cell division rates in the epithelium of human colonic, duodenal, esophageal, and posterior ethmoid sinonasal tissues. In all 4 tissues, there was a significant decrease in cell division rates with age. In contrast, cell division rates did not decrease in the colon of aged mice, and only small decreases were observed in their small intestine or esophagus. These results have important implications for understanding the relationship between normal stem cells, aging, and cancer. Moreover, they provide a plausible explanation for the enigmatic age-dependent deceleration in cancer incidence in very old humans but not in mice.
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Affiliation(s)
- Cristian Tomasetti
- Division of Biostatistics and Bioinformatics, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21205;
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21205
- Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205
| | - Justin Poling
- Pathology, Williamson Medical Center, Brentwood, TN 37207
| | - Nicholas J Roberts
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21205
- Department of Pathology, The Sol Goldman Pancreatic Cancer Research Center, The Johns Hopkins University, Baltimore, MD 21231
| | - Nyall R London
- Department of Otolaryngology, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Meredith E Pittman
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY 10065
| | - Michael C Haffner
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21205
- Department of Pathology, The Johns Hopkins University, Baltimore, MD 21231
| | - Anthony Rizzo
- Department of Pathology, The Johns Hopkins University, Baltimore, MD 21231
| | - Alex Baras
- Department of Pathology, The Johns Hopkins University, Baltimore, MD 21231
| | - Baktiar Karim
- Pathology & Histotechnology Laboratory, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 21702
| | - Antonio Kim
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21205
| | - Christopher M Heaphy
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21205
- Department of Pathology, The Johns Hopkins University, Baltimore, MD 21231
| | - Alan K Meeker
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21205
- Department of Pathology, The Johns Hopkins University, Baltimore, MD 21231
| | - Ralph H Hruban
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21205
- Department of Pathology, The Sol Goldman Pancreatic Cancer Research Center, The Johns Hopkins University, Baltimore, MD 21231
- Department of Pathology, The Johns Hopkins University, Baltimore, MD 21231
- Ludwig Center, Johns Hopkins University School of Medicine, Baltimore, MD 21205
- Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Christine A Iacobuzio-Donahue
- Department of Pathology, Rubenstein Center for Pancreatic Cancer Research, Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - Bert Vogelstein
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21205;
- Ludwig Center, Johns Hopkins University School of Medicine, Baltimore, MD 21205
- Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21205
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92
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van Dijk LJD, Ubbink R, Terlouw LG, van Noord D, Mik EG, Bruno MJ. Oxygen-dependent delayed fluorescence of protoporphyrin IX measured in the stomach and duodenum during upper gastrointestinal endoscopy. J Biophotonics 2019; 12:e201900025. [PMID: 31140739 PMCID: PMC7065646 DOI: 10.1002/jbio.201900025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 05/20/2019] [Accepted: 05/27/2019] [Indexed: 06/09/2023]
Abstract
Protoporphyrin IX-triplet state lifetime technique (PpIX-TSLT) is a method used to measure oxygen (PO2 ) in human cells. The aim of this study was to assess the technical feasibility and safety of measuring oxygen-dependent delayed fluorescence of 5-aminolevulinic acid (ALA)-induced PpIX during upper gastrointestinal (GI) endoscopy. Endoscopic delayed fluorescence measurements were performed 4 hours after oral administration of ALA in healthy volunteers. The ALA dose administered was 0, 1, 5 or 20 mg/kg. Measurements were performed at three mucosal spots in the gastric antrum, duodenal bulb and descending duodenum with the catheter above the mucosa and while applying pressure to induce local ischemia and monitor mitochondrial respiration. During two endoscopies, measurements were performed both before and after intravenous administration of butylscopolamine. Delayed fluorescence measurements were successfully performed during all 10 upper GI endoscopies. ALA dose of 5 mg/kg showed adequate signal-to-noise ratio (SNR) values >20 without side effects. All pressure measurements showed significant prolongation of delayed fluorescence lifetime compared to measurements performed without pressure (P < .001). Measurements before and after administration of butylscopolamine did not differ significantly in the duodenal bulb and descending duodenum. Measurements of oxygen-dependent delayed fluorescence of ALA-induced PpIX in the GI tract during upper GI endoscopy are technically feasible and safe.
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Affiliation(s)
- Louisa J. D. van Dijk
- Department of Gastroenterology and HepatologyErasmus MC University Medical CenterRotterdamThe Netherlands
- Department of RadiologyErasmus MC University Medical CenterRotterdamThe Netherlands
| | - Rinse Ubbink
- Department of Anesthesiology, Laboratory for Experimental AnesthesiologyErasmus MC University Medical CenterRotterdamThe Netherlands
| | - Luke G. Terlouw
- Department of Gastroenterology and HepatologyErasmus MC University Medical CenterRotterdamThe Netherlands
- Department of RadiologyErasmus MC University Medical CenterRotterdamThe Netherlands
| | - Desirée van Noord
- Department of Gastroenterology and HepatologyErasmus MC University Medical CenterRotterdamThe Netherlands
- Department of Gastroenterology and HepatologyFranciscus Gasthuis and VlietlandRotterdamThe Netherlands
| | - Egbert G. Mik
- Department of Anesthesiology, Laboratory for Experimental AnesthesiologyErasmus MC University Medical CenterRotterdamThe Netherlands
| | - Marco J. Bruno
- Department of Gastroenterology and HepatologyErasmus MC University Medical CenterRotterdamThe Netherlands
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93
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Liu G, Wang B, Huang Y, Li K, Ge W, Zhang M, Yue B, Kong M. The Growth Rate, Immune Status, Duodenal Development, and Cecal Microbial Diversity of 24-Day-Old Offspring of SD Rats Received Bacillus subtilis-Cu or CuSO 4 During Pregnancy and Lactation Periods. Biol Trace Elem Res 2019; 191:435-442. [PMID: 30788719 DOI: 10.1007/s12011-019-1638-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 01/10/2019] [Indexed: 11/29/2022]
Abstract
A total of 108 pregnant and lactation SD rats were divided into six groups, daily and orally dosed with Bacillus subtilis-copper (CuBs) and CuSO4 (CuS) both at three doses equivalent to 1.5 mg (Cu deficiency), 3 mg, and 6 mg Cu per kg diet, and the effects of the Cu source and dosage on the growth rate, immune status, duodenal development, and cecal microbial diversity were examined on 24-day-old offspring rats. The six offspring rats from each group were randomly selected for measuring the body weight gain and taking blood samples, and three rats were sacrificed for taking duodenum and cecum content samples. We found CuBs increased the body weight gain, development of duodenal villi, and survival rate of the offspring; increased the IgM content and lysozyme activity in serum; reduced the intestinal permeability; and increased the abundances of Lachnospiraceae, Ruminococcaceae, and Intestinibacter in the cecal content, when compared with CuS. We also found that Cu deficiency showed detrimental effects on the body weight gain and length, the survival rate of the offspring, and the immune indices in serum, as well as the increased intestinal permeability. We concluded that CuBs is better Cu source than CuSO4 for reproductive rats.
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Affiliation(s)
- Guodong Liu
- Food Science and Engineering of Qingdao Agricultural University, Qingdao, 266109, China
| | - Baowei Wang
- Food Science and Engineering of Qingdao Agricultural University, Qingdao, 266109, China.
- National Waterfowl Industrial Technology System Nutrition and Feed Function Laboratory, Qingdao, 266109, China.
| | - Yanping Huang
- Food Science and Engineering of Qingdao Agricultural University, Qingdao, 266109, China
| | - Kailing Li
- Food Science and Engineering of Qingdao Agricultural University, Qingdao, 266109, China
| | - Wenhua Ge
- National Waterfowl Industrial Technology System Nutrition and Feed Function Laboratory, Qingdao, 266109, China
| | - Mingai Zhang
- Food Science and Engineering of Qingdao Agricultural University, Qingdao, 266109, China
| | - Bin Yue
- National Waterfowl Industrial Technology System Nutrition and Feed Function Laboratory, Qingdao, 266109, China
| | - Min Kong
- National Waterfowl Industrial Technology System Nutrition and Feed Function Laboratory, Qingdao, 266109, China
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94
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Schwarz M, Lossow K, Kopp JF, Schwerdtle T, Kipp AP. Crosstalk of Nrf2 with the Trace Elements Selenium, Iron, Zinc, and Copper. Nutrients 2019; 11:E2112. [PMID: 31491970 PMCID: PMC6770424 DOI: 10.3390/nu11092112] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 08/19/2019] [Accepted: 08/23/2019] [Indexed: 01/14/2023] Open
Abstract
Trace elements, like Cu, Zn, Fe, or Se, are important for the proper functioning of antioxidant enzymes. However, in excessive amounts, they can also act as pro-oxidants. Accordingly, trace elements influence redox-modulated signaling pathways, such as the Nrf2 pathway. Vice versa, Nrf2 target genes belong to the group of transport and metal binding proteins. In order to investigate whether Nrf2 directly regulates the systemic trace element status, we used mice to study the effect of a constitutive, whole-body Nrf2 knockout on the systemic status of Cu, Zn, Fe, and Se. As the loss of selenoproteins under Se-deprived conditions has been described to further enhance Nrf2 activity, we additionally analyzed the combination of Nrf2 knockout with feeding diets that provide either suboptimal, adequate, or supplemented amounts of Se. Experiments revealed that the Nrf2 knockout partially affected the trace element concentrations of Cu, Zn, Fe, or Se in the intestine, liver, and/or plasma. However, aside from Fe, the other three trace elements were only marginally modulated in an Nrf2-dependent manner. Selenium deficiency mainly resulted in increased plasma Zn levels. One putative mediator could be the metal regulatory transcription factor 1, which was up-regulated with an increasing Se supply and downregulated in Se-supplemented Nrf2 knockout mice.
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Affiliation(s)
- Maria Schwarz
- Department of Molecular Nutritional Physiology, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Dornburger Str. 24, 07743 Jena, Germany
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, D-13353 Potsdam-Berlin-Jena, Germany
| | - Kristina Lossow
- Department of Molecular Nutritional Physiology, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Dornburger Str. 24, 07743 Jena, Germany
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, D-13353 Potsdam-Berlin-Jena, Germany
- German Institute of Human Nutrition, Arthur-Scheunert-Allee 114-116, 14558 Nuthetal, Germany
- Department of Food Chemistry, Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, 14558 Nuthetal, Germany
| | - Johannes F Kopp
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, D-13353 Potsdam-Berlin-Jena, Germany
- Department of Food Chemistry, Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, 14558 Nuthetal, Germany
| | - Tanja Schwerdtle
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, D-13353 Potsdam-Berlin-Jena, Germany
- Department of Food Chemistry, Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114-116, 14558 Nuthetal, Germany
| | - Anna P Kipp
- Department of Molecular Nutritional Physiology, Institute of Nutritional Sciences, Friedrich Schiller University Jena, Dornburger Str. 24, 07743 Jena, Germany.
- TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, D-13353 Potsdam-Berlin-Jena, Germany.
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95
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Jin M, Zhang T, Ding Y, Huang T, Cai Z. Enhancement effect of geniposide on solubility and intestinal absorption of baicalin. Pak J Pharm Sci 2019; 32:1933-1940. [PMID: 31813855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Geniposide and baicalin, the main components of Huangqin-Zhizi herb pair, have been combined to increase the efficacy. To reveal the underlying compatibility mechanism of these two components, the synergistic effects of geniposide on the enhancement of solubility, apparent oil-water partition coefficient, and intestinal absorption of baicalin were investigated. The equilibrium solubility and apparent oil-water partition coefficient of baicalin in different solvents were determined through the shake-flask and high-performance liquid chromatography with diode array detection methods. The intestinal absorption of baicalin was investigated through the in situ single-pass intestinal perfusion method. When combined with different amounts of geniposide, the solubility and apparent oil-water partition coefficient of baicalin improved to 98.74-159.03μg/mL and 0.24-0.29, respectively, which were respectively 1.25-2.02-fold and 1.6-1.9-fold higher than those parameters in the baicalin-only control. The intestinal absorption study indicated that geniposide was an absorption-enhancer for baicalin and significantly increased the absorption rate constant value and the apparent absorption constant value of baicalin, especially in duodenum and jejunum when the compatibility concentrations were 1:1 and 1:2. Geniposide had synergistic effects in enhancing the solubility, apparent oil-water partition coefficient, intestinal absorption of baicalin. The study results provide scientific information elucidating the compatibility mechanism of the Huangqin-Zhizi herb pair and its primary components.
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Affiliation(s)
- Minyi Jin
- Experiment Center For Teaching and Learning, Shanghai University of Traditional Chinese Medicine, Cailun Road, Pudong New Area, Shanghai, China
| | - Tong Zhang
- Experiment Center For Teaching and Learning, Shanghai University of Traditional Chinese Medicine, Cailun Road, Pudong New Area, Shanghai, China
| | - Yue Ding
- Experiment Center For Teaching and Learning, Shanghai University of Traditional Chinese Medicine, Cailun Road, Pudong New Area, Shanghai, China
| | - Tingpeng Huang
- Experiment Center For Teaching and Learning, Shanghai University of Traditional Chinese Medicine, Cailun Road, Pudong New Area, Shanghai, China
| | - Zhenzhen Cai
- Experiment Center For Science and Technology, Shanghai University of Traditional Chinese Medicine, Cailun Road, Pudong New Area, Shanghai, China
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96
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Shi Q, Cai L, Jia H, Zhu X, Chen L, Deng S. Low intake of digestible carbohydrates ameliorates duodenal absorption of carbohydrates in mice with glucose metabolism disorders induced by artificial sweeteners. J Sci Food Agric 2019; 99:4952-4962. [PMID: 30953347 DOI: 10.1002/jsfa.9727] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 04/03/2019] [Accepted: 04/05/2019] [Indexed: 05/27/2023]
Abstract
BACKGROUND Long-term artificial sweetener consumption has been reported to induce glucose intolerance, and the intestinal microbiota seems as an important target. While the impacts of artificial sweeteners on energy balance remain controversial, this work aimed to evaluate the protective effects in mice of a low digestible carbohydrate (LDC) diet on plasma glucose, plasma fasting insulin, sweet taste receptors, glucose transporters, and absorption of carbohydrates, together with consumption of acesulfame potassium (AK) or saccharin (SAC). RESULTS Artificial sweetener was administered to mice for 12 weeks to induce glucose metabolism disorders; mice were treated with an LDC diet for the final 6 weeks. The experimental groups were treated with an LDC diet that had the same energy as the normal-diet group. Prolonged administration of artificial sweeteners led to metabolic dysfunction, characterized by significantly increased plasma glucose, insulin resistance, sweet taste receptors, glucose transporters, and absorption of carbohydrates. Treatment with an LDC diet positively modulated these altered parameters, suggesting overall beneficial effects of an LDC diet on detrimental changes associated with artificial sweeteners. CONCLUSIONS Reducing digestible carbohydrates in the diet can significantly reduce the absorption of carbohydrates and improve glucose metabolism disorders caused by dietary factors. These effects may be due to the fact that reducing the amount of digestible carbohydrates in the feed can reduce the number of intestinal sweet receptors induced by exposure to artificial sweeteners. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Qing Shi
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Lei Cai
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Hongzhe Jia
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Xuemei Zhu
- School of Food Science and Technology, National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian, China
| | - Lei Chen
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Shaoping Deng
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
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97
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Fallahshahroudi A, Sorato E, Altimiras J, Jensen P. The Domestic BCO2 Allele Buffers Low-Carotenoid Diets in Chickens: Possible Fitness Increase Through Species Hybridization. Genetics 2019; 212:1445-1452. [PMID: 31160321 PMCID: PMC6707467 DOI: 10.1534/genetics.119.302258] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 05/29/2019] [Indexed: 01/04/2023] Open
Abstract
Domestic animals are adapted to conditions vastly different from those of their wild ancestors, and this is particularly true for their diets. The most numerous of all domestic species, the chicken, originated from the Red Junglefowl (RJF), a native of subtropical forests in Southeast Asia. Surprisingly however, in domestic chicken breeds, a common haplotype of the β-carotene oxygenase 2 (BCO2) gene, which is involved in carotenoid metabolism, is introgressed from a related species, the Gray Junglefowl, and has been under strong selective pressure during domestication. This suggests that a hybridization event may have conferred a fitness advantage on chickens carrying the derived allele. To investigate the possible biological function of the introgressed BCO2 allele in chicken, we introgressed the ancestral BCO2 allele into domestic White Leghorn chickens. We measured gene expression as well as carotenoid accumulation in skin and eggs of chickens carrying either the ancestral or the derived BCO2 allele. The derived haplotype was associated with down-regulation of BCO2 in skin, muscle, and adipose tissue, but not in liver or duodenum, indicating that carotenoid accumulation occurred in the tissues with reduced gene expression. Most importantly, we found that hens with the derived BCO2 genotype were capable of allocating stored carotenoids to their eggs, suggesting a functional benefit through buffering any shortage in the diet during egg production. Nevertheless, it is of interest that loss of function mutations in BCO2 gene are prevalent in other domesticates including cows, rabbits, and sheep, and, given the importance of carotenoids in development, reproduction, and immunity, it is possible that derived BCO2 alleles may provide a general mechanism in multiple domestic species to deal with higher demand for carotenoids in an environment with carotenoid shortage in the diet.
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Affiliation(s)
- Amir Fallahshahroudi
- Department of Medical Biochemistry and Microbiology, Biomedicine Centrum (BMC), Uppsala University, 752 37, Sweden
| | - Enrico Sorato
- Reneco International Wildlife Consultants, Abu Dhabi, UAE
| | - Jordi Altimiras
- AVIAN Behavioural Genomics and Physiology Group, IFM Biology, Linköping University, 58183, Sweden
| | - Per Jensen
- AVIAN Behavioural Genomics and Physiology Group, IFM Biology, Linköping University, 58183, Sweden
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98
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De Cicco M, Mamone G, Di Stasio L, Ferranti P, Addeo F, Picariello G. Hidden "Digestome": Current Analytical Approaches Provide Incomplete Peptide Inventories of Food Digests. J Agric Food Chem 2019; 67:7775-7782. [PMID: 31088053 DOI: 10.1021/acs.jafc.9b02342] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Analyzing an in vitro gastroduodenal digest of whey proteins by high-performance liquid chromatography (HPLC) coupled to high-resolution/high-sensitivity tandem mass spectrometry (MS/MS), we sought to evaluate if state-of-art peptidomics provide comprehensive peptide coverage of food "digestomes". A multitude of small-sized peptides derived from both α-lactalbumin and β-lactoglobulin as well as disulfide cross-linked hetero-oligomers remained unassigned, even when the digests were compared before and after S-S reduction. The precipitation with 12% trichloroacetic acid demonstrated the occurrence of large-sized polypeptides that escaped the bioinformatic identification. The analysis of a HPLC-MS/MS run with different proteomic search engines generated dissimilar peptide subsets, thus emphasizing the demand of refined searching algorithms. Although the MS/MS fragmentation of monocharged ions with exclusion of non-peptide-interfering compounds enlarged the inventory of short peptides, the overall picture of the "digestome" was still incomplete. These findings raise relevant implications for the identification of possible food-derived bioactive peptides or allergenic determinants.
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Affiliation(s)
- Maristella De Cicco
- Institute of Food Sciences , National Research Council (CNR) , Via Roma 64 , 83100 Avellino , Italy
| | - Gianfranco Mamone
- Institute of Food Sciences , National Research Council (CNR) , Via Roma 64 , 83100 Avellino , Italy
| | - Luigia Di Stasio
- Institute of Food Sciences , National Research Council (CNR) , Via Roma 64 , 83100 Avellino , Italy
- Department of Agriculture , University of Naples "Federico II" , Parco Gussone, Via Università 100 , 80055 Portici , Naples, Italy
| | - Pasquale Ferranti
- Department of Agriculture , University of Naples "Federico II" , Parco Gussone, Via Università 100 , 80055 Portici , Naples, Italy
| | - Francesco Addeo
- Department of Agriculture , University of Naples "Federico II" , Parco Gussone, Via Università 100 , 80055 Portici , Naples, Italy
| | - Gianluca Picariello
- Institute of Food Sciences , National Research Council (CNR) , Via Roma 64 , 83100 Avellino , Italy
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99
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Abstract
PURPOSE OF REVIEW The gastroduodenal mucosal layer is a complex and dynamic system that functions in an interdependent manner to resist injury. We review and summarize the most updated knowledge about gastroduodenal defense mechanisms and specifically address (a) the mucous barrier, (b) membrane and cellular properties, and vascular, hormonal, and (c) gaseous mediators. RECENT FINDINGS Trefoil factor family peptides play a crucial role in cellular restitution by increasing cellular permeability and expression of aquaporin channels, aiding cellular migration and tissue repair. Additionally, evidence suggests that the symptoms of functional dyspepsia may be attributed to alterations in the duodenum, including low-grade inflammation and increased mucosal permeability. The interaction of the various mucosal protective components helps maintain structural and functional homeostasis. There is increasing evidence suggesting that the upper GI microbiota plays a crucial role in the defense mechanisms. However, this warrants further investigation.
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Affiliation(s)
- Gian M Galura
- Department of Internal Medicine, Texas Tech University Health Science Center, El Paso, TX, USA
| | - Luis O Chavez
- Department of Internal Medicine, Texas Tech University Health Science Center, El Paso, TX, USA
| | - Alejandro Robles
- Department of Internal Medicine, Texas Tech University Health Science Center, El Paso, TX, USA
| | - Richard McCallum
- Department of Gastroenterology, Texas Tech University Health Science Center, El Paso, TX, USA.
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100
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Abstract
PURPOSE OF REVIEW Short-chain fatty acids (SCFAs), the main bacterial fermentation products in the hindgut of hindgut fermenters, are also present in the foregut lumen. We discuss the impact of SCFAs in the duodenal defense mechanisms and in the gastrointestinal (GI) pathogenesis. RECENT FINDINGS Luminal SCFAs augment the duodenal mucosal defenses via release of serotonin (5-HT) and glucagon-like peptide-2 (GLP-2) from enteroendocrine cells. Released GLP-2 protects the small intestinal mucosa from nonsteroidal anti-inflammatory drug-induced enteropathy. SCFAs are also rapidly absorbed via SCFA transporters and interact with afferent and myenteric nerves. Excessive SCFA signals with 5-HT3 receptor overactivation may be implicated in the pathogenesis of irritable bowel syndrome symptoms. SCFA production exhibits diurnal rhythms with host physiological responses, suggesting that oral SCFA treatment may adjust the GI clocks. SCFAs are not only a source of energy but also signaling molecules for the local regulation of the GI tract and systemic regulation via release of gut hormones. Targeting SCFA signals may be a novel therapeutic for GI diseases and metabolic syndrome.
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Affiliation(s)
- Mari Iwasaki
- West Los Angeles VAMC, 11301 Wilshire Blvd., Los Angeles, CA, 90073, USA
| | - Yasutada Akiba
- West Los Angeles VAMC, 11301 Wilshire Blvd., Los Angeles, CA, 90073, USA
- Department of Medicine, The David Geffen School of Medicine, University of California, Los Angeles, CA, 90073, USA
| | - Jonathan D Kaunitz
- West Los Angeles VAMC, 11301 Wilshire Blvd., Los Angeles, CA, 90073, USA.
- Department of Medicine, The David Geffen School of Medicine, University of California, Los Angeles, CA, 90073, USA.
- Department of Surgery, The David Geffen School of Medicine, University of California, Los Angeles, CA, 90073, USA.
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