Active transport of lead-210 by everted segments of rat duodenum
Journal Article
·
· Am. J. Physiol.; (United States)
OSTI ID:5774834
Everted gut sacs prepared from rat duodenum can transfer /sup 210/Pb from mucosal to serosal surfaces against concentration gradients in vitro. The mechanism requires oxygen and is significantly inhibited by sodium azide, sodium iodoacetate, 2,4-dinitrophenol, sodium cyanide and sodium fluoride. Lack of oxygen or the presence of metabolic inhibitors produced greater relative inhibition of net serosal transfer but greater absolute decrements of net mucosal uptake. Treatment of rats prior to sac preparation with either intravenous FeCl/sub 2/ or endotoxin, or the addition of FeCl/sub 2/ to the mucosal medium, selectively inhibited net serosal transfer. Net mucosal uptake and net serosal transfer were significantly negatively correlated with animal weight. Jejunal or ileal sacs did not actively transport /sup 210/Pb.
- Research Organization:
- Univ. of Alabama, Birmingham
- OSTI ID:
- 5774834
- Journal Information:
- Am. J. Physiol.; (United States), Journal Name: Am. J. Physiol.; (United States) Vol. 247:2; ISSN AJPHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
550501 -- Metabolism-- Tracer Techniques
560305* -- Chemicals Metabolism & Toxicology-- Vertebrates-- (-1987)
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ABSORPTION
ALKALI METAL COMPOUNDS
ALPHA DECAY RADIOISOTOPES
ANIMALS
ANTIGENS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BODY
CHLORIDES
CHLORINE COMPOUNDS
DIGESTIVE SYSTEM
ELEMENTS
ENDOTOXINS
EVEN-EVEN NUCLEI
GASTROINTESTINAL TRACT
HALIDES
HALOGEN COMPOUNDS
HEAVY NUCLEI
IN VITRO
INHIBITION
INTESTINAL ABSORPTION
INTESTINES
IRON CHLORIDES
IRON COMPOUNDS
ISOTOPES
LEAD
LEAD 210
LEAD ISOTOPES
MAMMALS
MATERIALS
MEMBRANE TRANSPORT
METABOLISM
METALS
NONMETALS
NUCLEI
ORGANS
OXYGEN
RADIOISOTOPES
RATS
RESPONSE MODIFYING FACTORS
RODENTS
SMALL INTESTINE
SODIUM COMPOUNDS
TOXIC MATERIALS
TOXINS
TRANSITION ELEMENT COMPOUNDS
UPTAKE
VERTEBRATES
YEARS LIVING RADIOISOTOPES
560305* -- Chemicals Metabolism & Toxicology-- Vertebrates-- (-1987)
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ABSORPTION
ALKALI METAL COMPOUNDS
ALPHA DECAY RADIOISOTOPES
ANIMALS
ANTIGENS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BODY
CHLORIDES
CHLORINE COMPOUNDS
DIGESTIVE SYSTEM
ELEMENTS
ENDOTOXINS
EVEN-EVEN NUCLEI
GASTROINTESTINAL TRACT
HALIDES
HALOGEN COMPOUNDS
HEAVY NUCLEI
IN VITRO
INHIBITION
INTESTINAL ABSORPTION
INTESTINES
IRON CHLORIDES
IRON COMPOUNDS
ISOTOPES
LEAD
LEAD 210
LEAD ISOTOPES
MAMMALS
MATERIALS
MEMBRANE TRANSPORT
METABOLISM
METALS
NONMETALS
NUCLEI
ORGANS
OXYGEN
RADIOISOTOPES
RATS
RESPONSE MODIFYING FACTORS
RODENTS
SMALL INTESTINE
SODIUM COMPOUNDS
TOXIC MATERIALS
TOXINS
TRANSITION ELEMENT COMPOUNDS
UPTAKE
VERTEBRATES
YEARS LIVING RADIOISOTOPES