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Title: The effects of plantain non starch polysaccharide upon the gut bacteria
Author: Backman, Ruth Valerie
ISNI:       0000 0004 2689 7397
Awarding Body: University of Aberdeen
Current Institution: University of Aberdeen
Date of Award: 2009
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The non-starch polysaccharide (NSP) components from apple, oat, broccoli and plantain were tested as growth substrates for representatives of the major groups of intestinal bacteria, none of which was able to fully utilise the NSPs for growth.  More bacteria were able to use the soluble plantain NSP fraction for growth than any other NSP tested, with the Bacteroides group showing the strongest growth response.  E. coli strains isolated from healthy people and Inflammatory bowel disease (IBD) patients were all able to utilise the soluble plantain substrate to the same high extent. A wide range of commensal anaerobes were able to bind to the insoluble plantain NSP in a strain specific manner that was independent of the ability to utilize the soluble plantain NSP for growth, with E. coli binding in the highest numbers to the insoluble NSP. The effects of plantain NSP were monitored in vivo, and only the Bacteroides group increased significantly after soluble plantain supplementation.  E. coli populations were volunteer-specific and unaltered after plantain supplementation. Bacteroides and E. coli were the two main groups affected by plantain NSP after the in vitro work, both of which have been implicated in IBD.  Binding to, and growth on plantain may therefore selectively alter the composition of the gut microbiota in patients.  Despite the stimulation of E. coli growth, addition of plantain to the diet may help to prevent colonization of the gut wall by providing this alternative binding substrate.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Gastrointestinal system ; Plantain banana