Document Detail


The acute toxicity and teratogenicity of cadmium in the pregnant rat.
MedLine Citation:
PMID:  7185887     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Until the 16th day of gestation the intravenous LD50 of Cd2+ in the pregnant Wistar-Porton rat is higher, but not significantly different from that (1.8 mg Cd2+ per kg body weight) in nulliparous females. At 20 days it is 1.1 mg Cd2+ kg per body weight. This decrease is related to the rapid increase in weight of the conceptuses in late gestation and to the retention of most of the dose in the maternal compartment. If the dose is based on body weight at conception, the LD50 for the 20-day pregnant rat (1.6 mg Cd2+ per kg body weight) and non-gravid female do not differ significantly. Nevertheless, after the same Cd2+ dose, hepatic and renal Cd2+ concentrations are less in the pregnant than in the non-pregnant animal. The Cd2+ concentrations, therefore, do not determine the liver and kidney damage, which is restricted to the pregnant rat. Placentae also accumulate Cd2+ and placental haemorrhage follows the injection of the appropriate Cd2+ LD50 on day 12-20 of gestation. In those animals that die between 16 and 30 h after dosing, haemorrhage and death appear to be correlated. Renal damage, therefore, probably results from haemorrhagic shock. It is not dependent on the transfer of protein-bound Cd2+ from the necrotic placentae to the kidney. Between the 8th and 15th day of gestation, Cd2+ (1.25 mg per kg body weight) is highly teratogenic. Hydrocephalus is the most frequent abnormality when the dose is given between the 8th and 12th day. Other malformations include eye defects, gastroschiasis and umbilical hernia.
Authors:
G P Samarawickrama; M Webb
Related Documents :
7080067 - Teratogenic activity of pyrimethamine in göttingen minipig.
8122027 - Teratogenicity of 13-cis retinoic acid and phenobarbital sodium in cf-1 mice.
12176097 - Developmental toxicity of n-methyl-2-pyrrolidone administered orally to rats.
22027887 - Enoxaparin dose adjustment is associated with low incidence of venous thromboembolic ev...
8820417 - Dose-related distribution of codeine and its metabolites into rat hair.
2167787 - Effects of chronic administration of an angiotensin-converting enzyme inhibitor on angi...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of applied toxicology : JAT     Volume:  1     ISSN:  0260-437X     ISO Abbreviation:  J Appl Toxicol     Publication Date:  1981 Oct 
Date Detail:
Created Date:  1983-10-08     Completed Date:  1983-10-08     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8109495     Medline TA:  J Appl Toxicol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  264-9     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Abnormalities, Drug-Induced*
Animals
Body Weight / drug effects
Cadmium / metabolism,  toxicity*
Embryo, Mammalian / drug effects
Female
Fetus / drug effects
Gestational Age
Lethal Dose 50
Male
Pregnancy
Rats
Rats, Inbred Strains
Tissue Distribution
Chemical
Reg. No./Substance:
7440-43-9/Cadmium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Number connection test and continuous reaction times in non-encephalopathic patients: a comparative ...
Next Document:  In vitro metabolism of inorganic arsenic by the gastro-intestinal microflora of the rat.