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Titolo:
Dietary influences on the secretion into and degradation of mucin in the digestive tract of monogastric animals and humans
Autore:
Lien, KA; Sauer, WC; He, JM;
Indirizzi:
Univ Alberta, Dept Agr Food & Nutr Sci, Edmonton, AB T6G 2P5, Canada Univ Alberta Edmonton AB Canada T6G 2P5 Sci, Edmonton, AB T6G 2P5, Canada
Titolo Testata:
JOURNAL OF ANIMAL AND FEED SCIENCES
fascicolo: 2, volume: 10, anno: 2001,
pagine: 223 - 245
SICI:
1230-1388(2001)10:2<223:DIOTSI>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTESTINAL-MUCUS GLYCOPROTEIN; HUMAN-COLON ECOSYSTEMS; RAT GASTRIC-MUCOSA; PROTEIN-SYNTHESIS; GASTROINTESTINAL-TRACT; POLYMERIC STRUCTURE; CELL-PROLIFERATION; GROWING-PIGS; WHEAT BRAN; SURFACE EPITHELIUM;
Keywords:
mucin; ileal digesta; secretion; endogenous protein; pigs;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
116
Recensione:
Indirizzi per estratti:
Indirizzo: Lien, KA Univ Alberta, Dept Agr Food & Nutr Sci, Edmonton, AB T6G 2P5, Canada Univ Alberta Edmonton AB Canada T6G 2P5 nton, AB T6G 2P5, Canada
Citazione:
K.A. Lien et al., "Dietary influences on the secretion into and degradation of mucin in the digestive tract of monogastric animals and humans", J ANIM FEED, 10(2), 2001, pp. 223-245

Abstract

Current information on the effect of diet on the secretion of mucus and the recovery of mucin in ileal digesta is summarized. A general description of mucus structure and its degradation in the small and large intestine is provided. As the protective lining of the entire gastrointestinal tract, mucus gels are exposed to all chemical and physical forces of digestion. Most important among these is the proteolytic breakdown of mucus gels into component mucin subunits and their subsequent release into the intestinal lumen. Erosion of mucus gels is countered by synthesis and secretion from the underlying epithelium. Diets can influence this process, both indirectly by their effects on digestive processes most importantly with respect to the amount and distribution of proteolytic enzymes in the intestinal lumen, and directly by tile physical forces which they exert on the gastrointestinal mucosa. Adaptive changes in goblet cell activity have been noted in response to different diets. Once in the intestinal lumen, little further degradationof mucus occurs prior to the large intestine. Once in the large intestine mucin is fermented by resident microbial populations. The recovery of undegraded mucin in ileal digesta has important implications for nutritional studies: firstly because it may represent a considerable loss of endogenous amino acids and carbohydrates and secondly because it may provide insight into the effects of diets on the digestive tract itself.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 05:15:38