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Titolo:
Influence of alpha-linked glucose on jejunal sodium-glucose co-transport activity in ruminants
Autore:
Bauer, ML; Harmon, DL; McLeod, KR; Huntington, GB;
Indirizzi:
Univ Kentucky, Dept Anim Sci, Lexington, KY 40546 USA Univ Kentucky Lexington KY USA 40546 pt Anim Sci, Lexington, KY 40546 USA
Titolo Testata:
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR AND INTEGRATIVE PHYSIOLOGY
fascicolo: 2-3, volume: 129, anno: 2001,
pagine: 577 - 583
SICI:
1095-6433(200106)129:2-3<577:IOAGOJ>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
BRUSH-BORDER MEMBRANE; SMALL-INTESTINE; SUCRASE-ISOMALTASE; STARCH DIGESTION; COTRANSPORTER; INFUSION; STEERS; SHEEP; ACID;
Keywords:
absorption; bovine; glucose; jejunum; ovine; ruminant; starch; intestine;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Harmon, DL Univ Kentucky, Dept Anim Sci, Lexington, KY 40546 USA Univ Kentucky Lexington KY USA 40546 , Lexington, KY 40546 USA
Citazione:
M.L. Bauer et al., "Influence of alpha-linked glucose on jejunal sodium-glucose co-transport activity in ruminants", COMP BIOC A, 129(2-3), 2001, pp. 577-583

Abstract

Eight steers and 12 lambs were used in a completely randomized experimental design to determine the effect of partial alpha -amylase starch hydrolysate (SH) on small intestinal sodium-dependent glucose transport activity. Starch hydrolysate was delivered ruminally or abomasally to steers (960 g/day) and sheep (144 g/day) for 7 days. On day 7, the steers were rendered unconscious, exsanguinated and eviscerated. A l-m section of jejunum was collected starting at the duodenojejunal flexure. Sheep were anaesthetized with pentobarbital and the second meter of small intestine (jejunum) was collected. Brush-border membrane vesicles were prepared and sodium-dependent glucose uptake activity was measured using the rapid uptake/filtration technique. Alkaline phosphatase and maltase activity was enriched by 8.2 +/- 0.5- and8.4 +/- 1.2-fold in the vesicle preparation, respectively, and was not different between treatments. Abomasal SH increased (P = 0.03) the Na/glucose co-transport approximately two-fold in both cattle (47.2-114.0 +/- 31.5 pmol/mg x sec) and sheep (77.4-152.0 +/- 25.7 pmol mg(-1) s(-1)). We conclude that Na/glucose co-transport activity by enterocytes responds to luminal alpha -linked glucose (from abomasal infusion) in ruminants, compared with controls. Intestinal maltase-specific activity does not respond to alpha-linked glucose in cattle, and decreases slightly in sheep. (C) 2001 Elsevier Science Inc. All rights reserved.

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Documento generato il 07/07/20 alle ore 17:28:38