Different pathways for lysine transport across neonatal pig intestine.

Ion transport across the normal and CF neonatal murine intestine.

Neonatal mice with cystic fibrosis (CF) exhibit a very high mortality due to intestinal obstruction localized primarily to the ileum and colon. It has been hypothesized that lack of Cl- secretion and possibly elevated Na+ absorption contribute to the gut problems in CF neonates. Therefore, intestines (ileum, proximal colon, and distal colon) from normal and CF day-old mouse pups were studied on...

Iron absorptive function of neonatal pig intestine.

To define the iron absorptive phase across the intestinal mucosa of neonatal pigs, the final SgFe concentration ratio of serosal to mucosal medium of everted gut sac at 1 hr incubation was measured. With .2 btg carrier iron (ferric citrate with molecular weight of 1,500) per milliliter of both the serosal and mucosal medium, the duodenum transported the iron against the concentration gradient f...

Lysine Transport across Isolated Rabbit Ileum

Lysine transport by in vitro distal rabbit ileum has been investigated by determining (a) transmural fluxes across short-circuited segments of the tissue; (b) accumulation by mucosal strips; and (c) influx from the mucosal solution across the brush border into the epithelium. Net transmural flux of lysine is considerably smaller than that of alanine. However, lysine influx across the brush bord...

Effects of cortisol on water transport across the eel intestine.

Transepithelial potential difference (PD) and net water flux were estimated simultaneously in the posterior part of the intestine isolated from Japanese eels with special reference to the role of cortisol in the sea-water adaptation of the intestine. When cortisol was previously injected into freshwater eels, the serosa negativity of the PD, water flux and osmotic permeability (Po) increased at...

Transepithelial D-glucose and D-fructose Transport Across Lobster Intestine