Development of an Affordable, Sustainable and Efficacious Plant-Based Immunomodulatory Food Ingredient Based on Bell Pepper or Carrot RG-I Pectic Polysaccharides

The prevalence of acute respiratory infections and their impact on quality of life underlies the need for efficacious solutions that are safe, sustainable and economically viable. Polysaccharides in several (traditional) plant extracts have been shown to be immunostimulatory, and some studies sugges...

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Veröffentlicht in:Nutrients 2021-03, Vol.13 (3), p.963
Hauptverfasser: McKay, Sue, Oranje, Paul, Helin, Jari, Koek, Jean H, Kreijveld, Ellen, van den Abbeele, Pieter, Pohl, Ute, Bothe, Gordana, Tzoumaki, Maria, Aparicio-Vergara, Marcela, Mercenier, Annick, Schols, Henk, Albers, Ruud
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container_issue 3
container_start_page 963
container_title Nutrients
container_volume 13
creator McKay, Sue
Oranje, Paul
Helin, Jari
Koek, Jean H
Kreijveld, Ellen
van den Abbeele, Pieter
Pohl, Ute
Bothe, Gordana
Tzoumaki, Maria
Aparicio-Vergara, Marcela
Mercenier, Annick
Schols, Henk
Albers, Ruud
description The prevalence of acute respiratory infections and their impact on quality of life underlies the need for efficacious solutions that are safe, sustainable and economically viable. Polysaccharides in several (traditional) plant extracts have been shown to be immunostimulatory, and some studies suggest beneficial effects against respiratory infections. The aim of this study was to (i) identify the active polysaccharide constituents from affordable and renewable crops (bell pepper and carrot) using activity-guided fractionation, (ii) evaluate in vitro effects on innate immune responses (phagocytosis and cytokine secretion), microbiota modulation and production of short chain fatty acids, followed by (iii) the evaluation of effects of a bell pepper extract enriched for the active component in a human proof of concept study. We identified rhamnogalacturonan-I (RG-I) as the nutricophore responsible for the immunostimulatory activity with substantial structural and functional equivalence between bell pepper (bp) and carrot (c). The in vitro studies showed that bpRG-I and cRG-I comprise similar immune- and microbiota modulatory potential and the human study demonstrated that bpRG-I was well tolerated and enhanced innate immune responsiveness in vivo. This is an important step towards testing the efficacy of RG-I from bpRG-I or cRG-I in an infection trial in humans.
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Polysaccharides in several (traditional) plant extracts have been shown to be immunostimulatory, and some studies suggest beneficial effects against respiratory infections. The aim of this study was to (i) identify the active polysaccharide constituents from affordable and renewable crops (bell pepper and carrot) using activity-guided fractionation, (ii) evaluate in vitro effects on innate immune responses (phagocytosis and cytokine secretion), microbiota modulation and production of short chain fatty acids, followed by (iii) the evaluation of effects of a bell pepper extract enriched for the active component in a human proof of concept study. We identified rhamnogalacturonan-I (RG-I) as the nutricophore responsible for the immunostimulatory activity with substantial structural and functional equivalence between bell pepper (bp) and carrot (c). The in vitro studies showed that bpRG-I and cRG-I comprise similar immune- and microbiota modulatory potential and the human study demonstrated that bpRG-I was well tolerated and enhanced innate immune responsiveness in vivo. 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The in vitro studies showed that bpRG-I and cRG-I comprise similar immune- and microbiota modulatory potential and the human study demonstrated that bpRG-I was well tolerated and enhanced innate immune responsiveness in vivo. 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source MDPI - Multidisciplinary Digital Publishing Institute; MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central; PubMed Central Open Access
subjects Adult
Aged
Biological activity
Capsicum - chemistry
Carrots
Chromatography
Cytokines
Cytokines - metabolism
Daucus carota - chemistry
Double-Blind Method
Enzymes
Female
Food products
Fractionation
Gastrointestinal Microbiome - drug effects
Humans
Immune response
Immune system
Immunologic Factors - isolation & purification
Immunologic Factors - pharmacology
Immunomodulation
Immunomodulators
Immunostimulation
In vivo methods and tests
Infections
Innate immunity
Killer Cells, Natural - drug effects
Killer Cells, Natural - physiology
Male
Metabolites
Microbiota
Middle Aged
Molecular weight
NMR
Nuclear magnetic resonance
Pectins - isolation & purification
Pectins - pharmacology
Phagocytosis
Phagocytosis - drug effects
Phytotherapy - methods
Plant extracts
Plant Extracts - isolation & purification
Plant Extracts - pharmacology
Polysaccharides
Proof of Concept Study
Quality of life
Rhamnogalacturonan
Saccharides
Spectrum analysis
Structure-function relationships
Sustainable development
Vegetables
Young Adult
title Development of an Affordable, Sustainable and Efficacious Plant-Based Immunomodulatory Food Ingredient Based on Bell Pepper or Carrot RG-I Pectic Polysaccharides
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