... community. Chyme Stomach Intestine Gut microbiome Mucosal chemistry Natural Sciences and Engineering Research Council of Canada http://dx.doi.org/10.13039/501100000038 RGPIN-2023-03714 Natural Environment Research Council http://dx.doi.org/10.13039/501100000270 NE...

... incorporation and the subsequent synthesis of nitrogenous compounds (urea, glutamine, bulk amino acids, protein) in the intestinal spiral valve, plasma, liver and muscle. Within 20 h post-feeding, we found labelled nitrogen was incorporated into all tissues examined. The highest δ 15 N values were seen...

..., the activities of apical intestinal peptidases increase within 15 h, in some cases by rapid increase in enzyme transcription followed by rapid translation and translocation to the intestine's apical, brush-border membrane (BBM). Focusing on aminopeptidase-N (APN), we studied intestinal digestive enzyme...

...Yoshio Takei; Marty K. S. Wong; Masaaki Ando ABSTRACT The intestine of marine teleosts secretes HCO 3 − into the lumen and precipitates Ca 2+ and Mg 2+ in the imbibed seawater as carbonates to decrease luminal fluid osmolality and facilitate water absorption. However, the hormonal regulation of HCO...

... nitrogen in the gills, kidney, rectal gland and gut, but as yet, the latter are not well characterized. Intestinal sac preparations of the Pacific spiny dogfish shark ( Squalus acanthias suckleyi ) incubated in vitro strongly reabsorbed urea from the lumen after feeding, but mucosal fluid ammonia...

...Ilan M. Ruhr; Kevin L. Schauer; Yoshio Takei; Martin Grosell ABSTRACT The guanylin peptides – guanylin, uroguanylin and renoguanylin (RGN) – are endogenously produced hormones in teleost fish enterocytes that are activators of guanylyl cyclase-C (GC-C) and are potent modulators of intestinal...

... also uncovered the importance of this regulation in coupling nutrient inputs with dILP secretion, and distantly controlling insulin/IGF signaling (IIS) in the intestine. Our results provide fundamental mechanistic insights into the top-down control involving tissues that play key roles in metabolic...

.... , Caviedes-Vidal , E. , Fasulo , V. , Yamin , L. J. and Karasov , W. H. ( 2003 ). Intestinal passive absorption of water soluble compounds by sparrows: effect of molecular size and luminal nutrients . J. Comp. Physiol. B   173 , 187 - 197 . Du , P. and Anumula , K. R...

...Antonio Brun; Edwin R. Price; Manuel N. Gontero-Fourcade; Guido Fernandez-Marinone; Ariovaldo P. Cruz-Neto; William H. Karasov; Enrique Caviedes-Vidal Water-soluble nutrients are absorbed by the small intestine via transcellular and paracellular mechanisms. Based on a few previous studies...

... and aqp10a had a broad tissue distribution, and several were affected by salinity in both osmoregulatory and non-osmoregulatory tissues. In the intestine, aqp1a, aqp7, aqp8ab and aqp10a decreased upon seawater (SW) acclimation in both long-term acclimated fish and during 1–3 days of the transition period...

...Carol Bucking; Chris M. Wood; Martin Grosell SUMMARY A radiotracer approach using diets labelled with 22 Na + , 36 Cl − and [ 14 C]polyethylene-4000 (PEG-4000) was employed to investigate the role of intestinal uptake from the food in ion homeostasis in the killifish Fundulus heteroclitus...

...Morten B. Engelund; François Chauvigné; Birgitte Mønster Christensen; Roderick Nigel Finn; Joan Cerdà; Steffen S. Madsen SUMMARY Aquaporins may facilitate transepithelial water absorption in the intestine of seawater (SW)-acclimated fish. Here we have characterized three full-length aqp8 paralogs...

...Hon Jung Liew; Gudrun De Boeck; Chris M. Wood SUMMARY In vitro gut sac preparations made from the cardiac stomach (stomach 1), pyloric stomach (stomach 2), intestine (spiral valve) and colon were used to examine the impact of feeding on transport processes in the gastrointestinal tract...

...Sílvia F. Gregório; Edison S. M. Carvalho; Sandra Encarnação; Jonathan M. Wilson; Deborah M. Power; Adelino V. M. Canário; Juan Fuentes SUMMARY The processing of intestinal fluid, in addition to a high drinking rate, is essential for osmoregulation in marine fish. This study analyzed the long-term...

... and kidney. The role of prolactin in intestinal ion transport remains little studied. In marine fish, which have high drinking rates, epithelial bicarbonate secretion in the intestine produces luminal carbonate aggregates believed to play a key role in water and ion homeostasis. The present study...

...Noura J. Al-Jandal; Jonathan M. Whittamore; Eduarda M. Santos; Rod W. Wilson SUMMARY The intestine of marine teleosts produces carbonate precipitates from ingested calcium as part of their osmoregulatory strategy in seawater. The potential for estrogens to control the production of intestinal...

...Ijeoma E. Obi; Kenneth M. Sterling; Gregory A. Ahearn SUMMARY Transepithelial transport of dietary d -glucose and d -fructose was examined in the lobster Homarus americanus intestine using d -[ 3 H]glucose and d -[ 3 H]fructose. Lobster intestines were mounted in a perfusion chamber to determine...

... in the high calcium environment, whereas efflux had the opposite relationship. A significant difference in the concentration of 45 Ca in the gastrointestinal tract (GIT) of fish in the low calcium environment led to the examination of drinking rate and calcium flux across the anterior-middle (mid) intestine...

...Chris M. Wood; Carol Bucking; Martin Grosell SUMMARY Marine teleosts generally secrete basic equivalents (HCO 3 – ) and take up Na + and Cl – in the intestine so as to promote absorption of H 2 O. However, neither the integration of these functions with feeding nor the potential role of the gut...

...C. K. Tipsmark; K. J. Sørensen; S. S. Madsen SUMMARY Osmotic balance in fish is maintained through the coordinated regulation of water and ion transport performed by epithelia in intestine, kidney and gill. In the current study, six aquaporin (AQP) isoforms found in Atlantic salmon ( Salmo salar...