title: Cadmium-induced enteropathy in domestic cocks: a biochemical and histological study after subchronic exposure.
abstract: The biochemical and histological sequelae resulting from a diet containing 50.20 mg cadmium/kg were studied in Lohmann brown cockerels from hatching until 30 days of age. The additional cadmium chloride (CdCl(2)) to the diet induced the formation of lipid peroxides, which via a chain reaction led to accumulation of malondialdehyde in intestinal mucosa. At the end of the study (after 30 days of cadmium exposure) total protein and metallothionein levels in the intestinal mucosa and the relative ileal and duodenal weight increased. Histological data show that CdCl(2) causes an increase in number of goblet cells and granular lymphocytes in the intestinal mucosa. Down-regulation of the serotonin-positive cells in the cadmium-treated animals was observed. Growth retardation (by 27%) occurred in chicken fed the cadmium-enriched diet for 30 days. Cadmium accumulation in the intestine was markedly higher (154 times) in the cadmium-treated animals compared to the control group. Cadmium induced a decrease in zinc (but not copper) content in intestinal mucosa. We suggest that cadmium uptake triggers an inflammatory and secretory response in chicken small intestine.
authors.affiliation: Laboratory of Biochemistry and Physiology of Animals, Institute of Biology of the University of Latvia, Salaspils, Latvia. nemo@pit.lv
authors.forename: Nadezhda
authors.initials: N
authors.lastname: Berzina
authors.forename: Jurijs
authors.initials: J
authors.lastname: Markovs
authors.forename: Sergejs
authors.initials: S
authors.lastname: Isajevs
authors.forename: Mirdza
authors.initials: M
authors.lastname: Apsite
authors.forename: Galina
authors.initials: G
authors.lastname: Smirnova
mesh_terms: D000818:Animals; D001835:Body Weight; D019256:Cadmium Chloride / Q000633:toxicity*; D002645:Chickens; D007410:Intestinal Diseases / Q000139:chemically induced / Q000378:metabolism / Q000473:pathology / Q000662:veterinary*; D007413:Intestinal Mucosa / Q000378:metabolism / Q000473:pathology; D008054:Lipid Peroxides / Q000378:metabolism; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism; D008668:Metallothionein / Q000097:blood; D011201:Poultry Diseases / Q000139:chemically induced* / Q000378:metabolism / Q000473:pathology
chemical_list: D008054:Lipid Peroxides; D008315:Malondialdehyde; D008668:Metallothionein; D019256:Cadmium Chloride