Enzymatically synthesized megalo-type isomaltosaccharides enhance the barrier function of the tight junction in the intestinal epithelium.
Biosci Biotechnol Biochem
; 82(4): 629-635, 2018 Apr.
Article
em En
| MEDLINE
| ID: mdl-29173029
ABSTRACT
Megalo-type isomaltosaccharides are an enzymatically synthesized foodstuff produced by transglucosylation from maltodextrin, and they contain a mid-chain length polymer of D-glucose with α-1,6-glycoside linkages. The injection of a solution of megalo-type isomaltosaccharides (1-4%(w/v), average DP = 12.6), but not oligo-type isomaltosaccharides (average DP = 3.3), into the intestinal lumen dose-dependently reduced the transport rates of tight junction permeable markers in a ligated loop of the anesthetized rat jejunum. Application of the megalosaccharide also suppressed the transport of tight junction markers and enhanced transepithelial electrical resistance (TEER) in Caco-2 cell monolayers. Cholesterol sequestration by methyl-ß-cyclodextrin in the Caco-2 monolayers abolished the effect of megalosaccharide. Treatment with anti-caveolin-1 and a caveolae inhibitor, but not clathrin-dependent endocytosis and macropinocytosis inhibitors, suppressed the increase in TEER. These results indicate that isomaltosaccharides promote the barrier function of tight junctions in the intestinal epithelium in a chain-length dependent manner and that caveolae play a role in the effect.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Carboidratos da Dieta
/
Junções Íntimas
/
Mucosa Intestinal
Limite:
Animals
/
Humans
/
Male
Idioma:
En
Revista:
Biosci Biotechnol Biochem
Assunto da revista:
BIOQUIMICA
/
BIOTECNOLOGIA
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Japão