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Effect of cadmium and zinc on intestinal absorption of xylose and tryptophan in the fresh water teleost fish, Heteropneustes fossilis

Journal Article · · Chemosphere; (United States)
OSTI ID:5776022
;
The effect of cadmium and of zinc on the rate of uptake of a pentose sugar xylose and an aminoacid tryptophan by the intestine of a teleost fish, Heteropneustes fossilis was studied under two experimental conditions. In the first, four concentration of cadmium or zinc mixed with the nutrient solution were filled in the intestinal sacs, and the rate of absorption was recorded after 1 h at 23/sup 0/C. In the second experiment fish were exposed by bath to a sublethal concentrations of cadmium or zinc for 15 and 30 days and the rate of absorption of the two nutrients was measured. The activity of intestinal Na/sup +/, K/sup +/ activated adenosine triphosphatase was also assayed. The two heavy metals at all the four concentrations decreased the rate of intestinal transport of nutrients. The rate of intestinal absorption of the two nutrients was also reduced by exposure of fish to the heavy metals in vivo. The activity of Na/sup +/, K/sup +/ ATPase decreased in vitro with all four concentrations of cadmium and zinc and was diminished in fish exposed for 15 and 30 days.
Research Organization:
DAV (PG) Coll., Muzaffarnagar, India
OSTI ID:
5776022
Journal Information:
Chemosphere; (United States), Journal Name: Chemosphere; (United States) Vol. 13:8; ISSN CHESB
Country of Publication:
United States
Language:
English

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Related Subjects

560305* -- Chemicals Metabolism & Toxicology-- Vertebrates-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ABSORPTION
ACID ANHYDRASES
ALDEHYDES
AMINO ACIDS
ANIMALS
AQUATIC ORGANISMS
AROMATICS
ATP-ASE
AZAARENES
AZOLES
BIOLOGICAL EFFECTS
CADMIUM COMPOUNDS
CADMIUM SULFATES
CARBOHYDRATES
CARBOXYLIC ACIDS
ENZYMES
FISHES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROLASES
INDOLES
INTESTINAL ABSORPTION
MONOSACCHARIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PENTOSES
PHOSPHOHYDROLASES
PYRROLES
SACCHARIDES
SULFATES
SULFUR COMPOUNDS
TRYPTOPHAN
UPTAKE
VERTEBRATES
XYLOSE
ZINC COMPOUNDS
ZINC SULFATES