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Galvin SG, Larraufie P, Kay RG, Pitt H, Bernard E, McGavigan AK, Brant H, Hood J, Sheldrake L, Conder S, Atherton-Kemp D, Lu VB, O'Flaherty EAA, Roberts GP, Ämmälä C, Jermutus L, Baker D, Gribble FM, Reimann F. Peptidomics of enteroendocrine cells and characterisation of potential effects of a novel preprogastrin derived-peptide on glucose tolerance in lean mice. Peptides 2021; 140:170532. [PMID: 33744371 PMCID: PMC8121762 DOI: 10.1016/j.peptides.2021.170532] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/26/2021] [Accepted: 03/10/2021] [Indexed: 12/15/2022]
Abstract
OBJECTIVES To analyse the peptidomics of mouse enteroendocrine cells (EECs) and human gastrointestinal (GI) tissue and identify novel gut derived peptides. METHODS High resolution nano-flow liquid chromatography mass spectrometry (LC-MS/MS) was performed on (i) flow-cytometry purified NeuroD1 positive cells from mouse and homogenised human intestinal biopsies, (ii) supernatants from primary murine intestinal cultures, (iii) intestinal homogenates from mice fed high fat diet. Candidate bioactive peptides were selected on the basis of species conservation, high expression/biosynthesis in EECs and evidence of regulated secretionin vitro. Candidate novel gut-derived peptides were chronically administered to mice to assess effects on food intake and glucose tolerance. RESULTS A large number of peptide fragments were identified from human and mouse, including known full-length gut hormones and enzymatic degradation products. EEC-specific peptides were largely from vesicular proteins, particularly prohormones, granins and processing enzymes, of which several exhibited regulated secretion in vitro. No regulated peptides were identified from previously unknown genes. High fat feeding particularly affected the distal colon, resulting in reduced peptide levels from GCG, PYY and INSL5. Of the two candidate novel peptides tested in vivo, a peptide from Chromogranin A (ChgA 435-462a) had no measurable effect, but a progastrin-derived peptide (Gast p59-79), modestly improved glucose tolerance in lean mice. CONCLUSION LC-MS/MS peptidomic analysis of murine EECs and human GI tissue identified the spectrum of peptides produced by EECs, including a potential novel gut hormone, Gast p59-79, with minor effects on glucose tolerance.
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Affiliation(s)
- Sam G Galvin
- University of Cambridge Metabolic Research Laboratories, WT-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 0QQ, UK
| | - Pierre Larraufie
- University of Cambridge Metabolic Research Laboratories, WT-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 0QQ, UK
| | - Richard G Kay
- University of Cambridge Metabolic Research Laboratories, WT-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 0QQ, UK
| | - Haidee Pitt
- Animal Science and Technologies - UK, AstraZeneca, The Babraham Institute, Cambridge, UK
| | - Elise Bernard
- ADPE, AstraZeneca Ltd, Granta Park, Cambridge, CB21 6GH, UK
| | - Anne K McGavigan
- University of Cambridge Metabolic Research Laboratories, WT-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 0QQ, UK
| | - Helen Brant
- Animal Science and Technologies - UK, AstraZeneca, The Babraham Institute, Cambridge, UK
| | - John Hood
- Pharmacokinetics, AstraZeneca Ltd, Granta Park, Cambridge, UK
| | - Laura Sheldrake
- Animal Science and Technologies - UK, AstraZeneca, The Babraham Institute, Cambridge, UK
| | - Shannon Conder
- Animal Science and Technologies - UK, AstraZeneca, The Babraham Institute, Cambridge, UK
| | - Dawn Atherton-Kemp
- Animal Science and Technologies - UK, AstraZeneca, The Babraham Institute, Cambridge, UK
| | - Van B Lu
- University of Cambridge Metabolic Research Laboratories, WT-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 0QQ, UK
| | - Elisabeth A A O'Flaherty
- University of Cambridge Metabolic Research Laboratories, WT-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 0QQ, UK
| | - Geoffrey P Roberts
- University of Cambridge Metabolic Research Laboratories, WT-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 0QQ, UK
| | - Carina Ämmälä
- Bioscience Metabolism, Research and Early Development Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, 431 83 Mölndal, Sweden
| | - Lutz Jermutus
- Research and Early Development Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca Ltd, Cambridge, UK
| | - David Baker
- Research and Early Development Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca Ltd, Cambridge, UK
| | - Fiona M Gribble
- University of Cambridge Metabolic Research Laboratories, WT-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 0QQ, UK.
| | - Frank Reimann
- University of Cambridge Metabolic Research Laboratories, WT-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 0QQ, UK.
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Tsermoula P, Virgili C, Ortega RG, Mullen AM, Álvarez C, O'Brien NM, O'Flaherty EAA, O'Neill EE. Functional protein rich extracts from bovine and porcine hearts using acid or alkali solubilisation and isoelectric precipitation. Int J Food Sci Technol 2018. [DOI: 10.1111/ijfs.14065] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Paraskevi Tsermoula
- School of Food and Nutritional Sciences University College Cork Western Road Cork T12 YN60 Ireland
| | - Claudia Virgili
- School of Food and Nutritional Sciences University College Cork Western Road Cork T12 YN60 Ireland
| | - Rodrigo G. Ortega
- School of Food and Nutritional Sciences University College Cork Western Road Cork T12 YN60 Ireland
| | - Anne M. Mullen
- Food Chemistry and Technology Department Teagasc Food Research Center Ashtown, Dublin15 D15 DY05 Ireland
| | - Carlos Álvarez
- Food Chemistry and Technology Department Teagasc Food Research Center Ashtown, Dublin15 D15 DY05 Ireland
| | - Nora M. O'Brien
- School of Food and Nutritional Sciences University College Cork Western Road Cork T12 YN60 Ireland
| | | | - Eileen E. O'Neill
- School of Food and Nutritional Sciences University College Cork Western Road Cork T12 YN60 Ireland
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